CN110082839A - A kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting - Google Patents
A kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting Download PDFInfo
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Abstract
The invention discloses a kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit methods of prospecting, according to geology background and Intermediate acidity rock distributed area, crypto-explosion breccia spatial is tentatively identified using high-precision remote Sensing Interpretation, accurate establishment crypto-explosion breccia remote Sensing Interpretation regularity of distribution figure, preliminary screening go out crypto-explosion breccia distributed area.Ten thousand geochemical survey of 1:5 is carried out, element hydrographic name distribution map is drawn a circle to approve out.Control recourse is carried out in the deployment 1:5000 magnetic survey of emphasis exception section, tentatively preferably marks off crypto-explosion breccia containing mine；Deployment exploratory trench carries out exposure control, draws a circle to approve out mineralization body or ore body；According to ore body or mineralising body characteristics, preferably grade height, the deployment drilling of sweeping crypto-explosion breccia, deep verifying is carried out, and specifically draw a circle to approve out ore body.The present invention has quickly identification crypto-explosion breccia, provides accurate crypto-explosion breccia containing mine for trenching, probing deployment；The characteristics of can effectively improving and reconnoitre efficiency, shortening Collate checing cycle.
Description
Technical field
The invention belongs to mineral products technical fields, are related to a kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting.
Background technique
Ore-bearing formation, Ore-controlling factor and the ore body exposure feature of crypto-explosion breccia and general intrusive rock or Volcanic area
Difference may extend and reconnoitre if being reconnoitred according to the methods of conventional soil surveying, transient electromagnetic, low resolution remote sensing
Period, effect of ore-prospect are low and prospecting result is unobvious etc..
Summary of the invention
The purpose of the present invention is to provide a kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit methods of prospecting.This method is to make in land
Under the environment of mountain, efficient geo-exploration technology, the party are provided with the cryptoexplosive-breccia-rock type Cu-polymetallic deposit in Intermediate acidity rock
Method can quickly shorten Collate checing cycle, save capital investment, realize exploration breakthrough.
Itself the specific technical proposal is:
A kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting, comprising the following steps:
Step 1, the intermediate acidity magmatic rock for choosing extensive exposure in survey area, pass through mineralogy, petrogeochemistry
The analysis such as feature, determines its structural environment output in syn-collision Intra-continental orogen environment.
Magmatic activity is strong in area, and the distribution of igneous rocks is extensive, predominantly Intermediate acidity rock, and lithology is like the long flower of plaque-like two
Gang Yan, granodiorite, diabase, granodiorite-porphyry, quartz diorite porphyrite etc..Main Rock-forming Minerals be plagioclase, quartz,
Orthoclase, hornblend, biotite and a small amount of accessory mineral；Rock has the spy of high potassium calc-alkaline, aluminium supersaturation type, S I type granite
Sign, and characteristic remarkable is lost in Big ion lithophile elements enrichment, High field side injection；According to geology background and digital seismograph network figure
Solution analysis, Intermediate acidity rock output are provided in syn-collision Intra-continental orogen environment, Crust-mantle interaction for Cu-polymetallic deposit matter
Power and substance source.
Step 2 selects Worldview, IKONOS high-precision satellite data, and crypto-explosion breccia is interpreted in area in reconnoitring
The spatial Correlation Analysis such as the analysis of the feature correlations such as Intermediate-acid Intrusive and hydroxyl, Ferric contamination anomaly and Intermediate acidity rock
On the basis of, it is preliminary to draw a circle to approve crypto-explosion breccia spatial position.
By the country rock of crypto-explosion breccia in (1) area predominantly in acid porphyritic monzonitic granite, crypto-explosion breccia with enclose
Rock boundary line is clear, and country rock has choritization, argillization phenomenon.Cryptoexplosive-breccia-rock type copper lead zinc deposit is formed in the late Paleozoic-
The intracontinental collision stage of early Mesozoic Structural cycle, formation of ore deposits may be related with the hidden quick-fried effect occurred at the top of porphyry, mineral deposit
By the control of latent porphyry and construction, the control of the output of ore body by crypto-explosion breccia cylinder.Crypto-explosion breccia dust content 40%-
60%, gravel diameter 3-15cm, rock cylinder inside dust is relatively small, and outside dust is larger；Dust is in irregular, even visible secondary rib more
The secondary round shape of horn shape-；Dust complicated component, mostly granite, secondary is volcanic rocks.Select Worldview, IKONOS high-precision
The comprehensive means such as satellite image, topographic map, data statistics compare research using the image of different-waveband and combination,
Geologic feature etc. carries out the synthesis of index of image interpretation in combined ground fact finding and studied area, is aided with choritization, mud
Change and carbonation is abnormal and Cu-polymetallic deposit produces spatial Correlation Analysis；Interpretation extracts crypto-explosion breccia distribution, rule in area
The spatials feature such as mould.
Step 3, the crypto-explosion breccia space configuration according to the delineation carry out ten thousand geochemical survey of 1:5, preliminary screening
Crypto-explosion breccia copper-polymetallic target prospecting area；
Ten thousand geochemical survey of 1:5 is carried out by (2) drawing a circle to approve, filtering out crypto-explosion breccia copper-polymetallic target prospecting area,
Sampling point distribution is made every effort to control charge for remittance domain to greatest extent, and sampling density is controlled in 15-20 point/km2Within；Test data is utilized
The element combinations such as the software development such as GeoExplor and Mapgis6.7 Cu, Au, Mo, Ag, As, Bi, Sb, Pb, Zn, W, Hg are abnormal
Figure, and carry out commenting sequence in identical host element class, it is then big according to Cu, Pb, Zn element anomalies feature, geological conditions and ore-prospecting meaning
Small carry out anomaly classification；The Geological Achievements such as bond area geologic feature, previous Geophysical-chemical, initial option elemental peak is high, gradient
Greatly, concentration zoning, concentration center are obvious, and fitting is good, the strong abnormal delineation target prospecting area of Zonal regularity, and carry out target area point
Class.
Step 4, the crypto-explosion breccia copper-polymetallic target prospecting area according to the screening pass through large scale high-precision
Magnetic survey determines that crypto-explosion breccia copper-polymetallic looks for mine clue；It is investigated again by earth's surface mineral product geology, exploratory trench, probing
Further sampling analysis draws a circle to approve ore body or mineral deposit.
1:5000 high-precision magnetic survey is carried out in the preferred target area tentatively drawn a circle to approve using step 3, cooperation；First against hidden quick-fried dust
Rock and country rock acquire different magnetic samples, measure magnetic parameter；Using 500 × 100m rule mesh, first according to work layout drawing meter
The theoretical coordinate for calculating all measuring points of every survey line, using the positioning of handhold GPS, navigation feature, according to each measuring point theoretical coordinate
Implement positioning；To starting point, endpoint, mark and indicate some wire sizes with timber every 1000 meters, each measuring point do a wire size, coordinate,
The storage of the instrument of elevation and magnetic data；Later period arranges magnetic data, correction analysis, selects that anomaly intensity is big, gradient
Suddenly, the more regular needle pattern of positive and negative association, form delineation magnetic anomaly extremely, draws high-precision magnetic survey Abnormal Map；And in combination
Matter feature explains deduction, disposes and predict to provide direct basis for later period correlation section.
According to the preferred crypto-explosion breccia of step 3, in conjunction with the features such as earth's surface crypto-explosion breccia Extract Mineralized Alteration, exception, deployment
Exploratory trench carries out exposure control；In conjunction with make an on-the-spot survey on the spot, on the basis of earth's surface mineralising and off-note carry out trenching engineering specific positioning,
Being typically located at earth's surface the 4th is the mineralising location that cladding thickness is no more than 3m, is arranged perpendicular to crypto-explosion breccia long axis direction；
It is required that slot bottom is wide to cannot be less than 0.5-0.8m, depth is generally no greater than 3m, discloses fresh matrix and reaches 0.3-0.5m, can see
It examines and understands that occurrence is principle.Chemical sample slot is arranged in the joint of cell wall and slot bottom, and is drawn sample slot on the spot with red paint
And sample number is marked, it avoids staged from sampling, avoids sampling weight section or jumping as far as possible adopting, be sampled using groove engraving, sample slot specification is 10
× 3cm, example weight error rate must not be higher than 10%, and when sampling will clean sampled point rock surface, hang up properly cloth, must guarantee
Sample is not contaminated and splashes mistake, and acquisition method is strictly pressed specification and carried out, and presses same orientation, same inclination angle cloth specimen, various kinds as far as possible
Product want end to end；In addition to chemical sample, the full slot control of rock-like must also be adopted by 2-5m spacing.It disclosed, chased after by trenching work
Rope, control ore body or mineralization body, tentatively find out ore body or mineralising volume morphing, occurrence, scale, draw a circle to approve earth's surface ore body or mineralization body.
According to ore body or mineralising body characteristics in step 3,4 earth's surfaces, exploratory trench, preferably grade height, sweeping crypto-explosion breccia
Deployment drilling, specific boring positioning in earth's surface the enrichment of mineralization crypto-explosion breccia, and with reference to crypto-explosion breccia scale or attitude of stratum,
The factors such as landform are specifically positioned；Drilling project construction is generally straight hole, and construction method uses large diameter directional drilling technology as far as possible,
Necessary end bore open is not less than 75mm；Ore body and its mine heart, rock core in roof and floor 3-5m are averaged taking rate not less than 80%, thick
Inside gulf otherwise continuous length of the mine heart taking rate lower than 90% will use remedial measure, country rock rock core no more than 5m
The layering taking rate that is averaged must not require lower than 80%, to ore bed or mineralized layer and its roof and floor, mineralized alteration zone, tectonic position
Geological phenomenon etc. main location is described in detail, and attached necessary sketch and photograph, after splitting heart sampling, also copes with important mineralising
Phenomenon etc. does additional notes record.The drilling method of sampling is that be split along core or mine core long axis direction and mineralising uniformity be two
Half, half send measuring unit processing chemical examination as fundamental analysis sample, the other half is retained in case of checking and research is used；In ore body or
Mineralization body must not up-sample cross-layer, sample long 1.5m, no longer than 2m, two circle side side-draw sample of ore body or mineralization body body.Pass through brill
Visiting engineering can be appreciated that the situations of change such as crypto-explosion breccia ore body or mineralization body deep grade, thickness, scale, occurrence, to find
Deep orebody or mineral deposit.
Further, determine need to be using the professional softwares such as GEOKIT production ACF diagram, REE distribution map, micro- for the structural environment
The graphs such as secondary element spider diagram and construction disciminating diagrams；
Further, the high-precision remote Sensing Interpretation remote sensing sources select Worldview, IKONOS high-precision satellite number
According to interpretation extracts crypto-explosion breccia in area, works out crypto-explosion breccia remote Sensing Interpretation distribution map.
Further, the geochemical survey technology is high-precision using 1,/50,000 stream sediment survey's technologies and 1/5000
Spend magnetic survey technology；Hydrographic name distribution map, high-precision magnetic survey Abnormal Map need to be drawn out.
Further, the trenching selects crypto-explosion breccia, in conjunction with features such as earth's surface crypto-explosion breccia Extract Mineralized Alteration, exceptions
Trenching is affixed one's name to, trenching should be arranged perpendicular to crypto-explosion breccia long axis of body direction；It is sampled using groove engraving, sample slot specification is 10 × 3cm；
In addition, the full slot control of rock-like must also be adopted by 2-5m spacing；Draw a circle to approve earth's surface ore body or mineralization body.
Further, the probing is high, sweeping hidden in conjunction with ore body or mineralising body characteristics in earth's surface, exploratory trench, preferably grade
Quick-fried breccia deployment drilling, specific boring positioning understand crypto-explosion breccia ore body or mine in earth's surface the enrichment of mineralization crypto-explosion breccia
Change the situations of change such as body deep grade, thickness, scale, occurrence, to find deep orebody or mineral deposit.
Compared with prior art, beneficial effects of the present invention:
The present invention has quickly identification crypto-explosion breccia, provides accurate crypto-explosion breccia containing mine for trenching, probing deployment；
The characteristics of can effectively improving and reconnoitre efficiency, shortening Collate checing cycle；And efficient exploration technique is provided for quick discovery or breakthrough
Method is suitble to promote and apply.
Detailed description of the invention
Fig. 1 is crypto-explosion breccia area geo-exploration technology combination flow chart；
Fig. 2 is card and card mining area crypto-explosion breccia geologic scheme, in figure, 1 the 4th system；2 Triassic period E Lashan group；3 gold medals
Mouth of a river rock group's griotte section；4 Jinsui River Kou Yan groups of gneiss sections；5 late Triassic epoch granodiorites；Particulate two is long in 6 Middle Triassic epoch
Granite；7 Permian epoch porphyritic monzonitic granites；8 crypto-explosion breccias；9 ore bodies；10 crushed zones；11 tomographies；12. region structure
Make illustration；
Fig. 3 is HS5First2Bi, Cu (Ag, As, Sb) exception explosion views；
Fig. 4 is HS11First2Bi, Cu (Ag, Au, Mo) exception explosion views；
Fig. 5 is ten thousand M3-9 abnormal profile plan view of 1:1；
Fig. 6 is card and card crypto-explosion breccia longitudinal sectional drawing；In figure, 1- porphyritic monzonitic granite；The hidden quick-fried dust of 2-
Rock；3- Pb- Zn orebody；4- bore position；5- grade/thickness；
Fig. 7 is card and blocks 7 exploratory grid cross sections, in figure, 1- porphyritic monzonitic granite；2- crypto-explosion breccia；3- lead
Zinc ore body；4- grade/thickness；5- bore position.
Specific embodiment
Technical solution of the present invention is described in more detail below with reference to embodiment.
Referring to Fig.1, a kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting, comprising the following steps:
A, it according to geology background and Intermediate acidity rock distribution characteristics, is tentatively identified using high-precision remote Sensing Interpretation
Crypto-explosion breccia spatial out, it is accurate to work out crypto-explosion breccia remote Sensing Interpretation regularity of distribution figure.
B, the crypto-explosion breccia area screened to step a carries out the measurement of ten thousand stream sediment survey of 1:5, works out Cu, Pb, Zn
Equal elements hydrographic name distribution map.
C, the elements such as Cu, Pb, Zn of the delineation according to step b hydrographic name distribution map, in emphasis exceptions area
Section deployment 1:5000 magnetic survey carries out control recourse, works out high-precision magnetic survey Abnormal Map, tentatively preferably marks off hidden quick-fried containing mine
Breccia；
D, mine crypto-explosion breccia is preferably contained according to step c, in conjunction with earth's surface crypto-explosion breccia Extract Mineralized Alteration feature, deployment is visited
Slot carries out exposure control, draws a circle to approve out mineralization body or ore body；
E, according to ore body in step d or mineralising body characteristics, preferably grade height, the deployment of sweeping crypto-explosion breccia drills,
Deep verifying is carried out, and specifically draws a circle to approve out ore body.
NORTHEASTERN MARGIN OF QINGHAI-XIZANG PLATEAU and the main output of the adjoint crypto-explosion breccia of extensive Intermediate acidity rock are in intracontinental collision
Environment proposes " intracontinental collision environment+high-precision for the ore-bearing formation of crypto-explosion breccia, Ore-controlling factor and ore body occurrence characteristics
Spend ten thousand geochemical surveys of remote sensing+1:5+high-precision magnetic survey " method of prospecting system is integrated, how golden carry out crypto-explosion breccia copper
Belong to ore body prospecting work.By in recent years reconnoitre and scientific research work, achieve huge exploration breakthrough.
The combination of the crypto-explosion breccia Cu-polymetallic deposit method of prospecting specifically looks for mine process as shown in Figure 1.
1, intracontinental collision environment
Intracontinental collision environment is the primary condition that karr but blocks that large-scale cryptoexplosive-breccia-rock type Cu-polymetallic deposit is formed, Triassic period
Incident heat shows that collision collision effect and mineralization has occurred in the phase in Caidamu Basin south, the northern fringe, extensive middle acid
It is accompanied by crypto-explosion breccia in intrusive rock, has Cu-polymetallic deposit at the mine fact；Crypto-explosion breccia containing mine and physical prospecting magnetic anomaly are changed
Visiting comprehensive exception has preferable correspondence, and Diagenetic And Mineralization Ages concentrate on Early-Middle Triassic.
2, high-precision Remotely sensed acquisition technology
Remote sensing sources have selected Worldview, IKONOS satellite data.It is hidden quick-fried but to block area by remote Sensing Interpretation karr
The mineral products correlation analysis such as breccia feature and the more metals of copper, the mineral products spatial coherences such as hydroxyl, Ferric contamination anomaly and the more metals of copper
Remote sensing geology Minerals characteristic in emphasis area, the inherence between remote sensing abnormal and the production of crypto-explosion breccia Cu-polymetallic deposit are explored in analysis
Connection.And on the basis of comprehensive analysis remote Sensing Interpretation and remote sensing abnormal feature, to predict the mines such as the more metals of crypto-explosion breccia copper
Production resource is direct purpose, draws a circle to approve remote sensing prediction area.
3, ten thousand geochemical survey of 1:5
Using area's Study of Platycladus orientalis-Robinia pseudoacacia condition, geology and Geochemical Characteristics as foundation, is layouted and associated sample acquisition, analysis are ground
Study carefully work.
(1), using ten thousand topographic map of 1:5 as work hand figure, sampling density is controlled in 4-8 point/km2Within.
(2) exceptions area band or known mineralising location are made suitably pass point to control, and sampling point distribution is made every effort to control remittance to greatest extent
The uniform Reasonable Arrangement of sampling point is taken into account in waters.
(3) the monitoring of GPS track is implemented in stream sediment survey's field sampling, implements field point, line, net using GPS receiver
Geographical coordinate accurately measure, guarantee geochemistry work in sample accuracy.
(4) data processing is to utilize GeoExplor and Mapgis6.7 etc. based on sediments sample analysis data
Software is completed.
(5) on the basis of anomaly association figure, screened to all exceptions of the whole district." the earth is used after comprehensive abnormal delimitation
Chemical parameters computational chart " and " geochemical anomaly commentary table " determine off-note combination (host element and accompanying element) and carry out
Sequence is commented in identical host element class, abnormal ore-prospecting meaning is then carried out according to off-note, geological conditions and ore-prospecting meaning size
Classification.
It (6) is base map using ten thousand geological and mineral figure of 1:5, according to the above geochemical anomaly distribution characteristics of Class B in area, in combination
The Geological Achievements such as matter feature, previous Geophysical-chemical, placer abnormal determine target prospecting area, the regularity of ore formation of analyzing and researching and ore-searching potential,
According to ore-prospecting future and the relative size for looking for mine certainty, divide A, B, C three-level, and is indicated with not synteny.
4, high-precision magnetic survey
In karr, but card cryptoexplosive-breccia-rock type Cu-polymetallic deposit area application effect is obvious for magnetic survey.In field work,
Magnetic survey all uses 500 × 100m rule mesh, and the theory of all measuring points of every survey line is first calculated according to work layout drawing
Coordinate is implemented to position using the positioning of handhold GPS, navigation feature according to each measuring point theoretical coordinate.To starting point, endpoint, every
1000 meters mark with timber and indicate some wire sizes, and each measuring point has done the instrument storage of some wire sizes, coordinate, elevation and magnetic data.
Later period carries out finishing analysis to magnetic data, draws a circle to approve magnetic anomaly, and explain deductions in conjunction with geologic feature, be target area it is preferred and
Prediction provides direct basis.
In conclusion but being blocked in NORTHEASTERN MARGIN OF QINGHAI-XIZANG PLATEAU karr by reconnoitring and looking in recent years mine technical method to test
Area and periphery achieve huge exploration breakthrough, and preferred many places target prospecting areas.Show geo-exploration technology combination in land
Extensive Intermediate acidity rock has good prospecting result with crypto-explosion breccia area in interior collision border, and in follow-up work
In with huge exploration breakthrough prospect, can further genralrlization application.
Embodiment 1
Selection is located at east Qunlun Qimantage district card for card cryptoexplosive-breccia-rock type Cu-polymetallic deposit, carries out this and surveys
The prospecting result for looking into technical method combination is sketched.
1, go out crypto-explosion breccia distributed area using high-precision remote Sensing Interpretation preliminary screening
(1) stratum
The area exposure stratum is mainly mountain group between Kou Yan groups, Lower Proterozoic Jinsui River, Ordovician-Silurian beach.Wherein Lower Proterozoic
Jinsui River Kou Yan groups is a set of middle deep matter metamorphic rock, is mostly present in Indosinian epoch plutone in xenolith.Stratum is mainly in northwest (NW)-
East southeast is in around intrusive contact with Indosinian epoch intrusive rock to zonal distribution.Lithology mainly has banded migmatite, augen mixing
Rock presss from both sides biotite plagioclase gneiss, plagioclase gneiss is dodged at angle.Mountain group outcrop area about 12km between Ordovician-Silurian beach2, in not advising
Then shape is distributed, and surrounding surrounded by rock mass, forms the Remained mass of an island shape, can solution translate volcanic rock group, carbonate rock group 2
A stratigraphic unit；Wherein volcanic rock group is in northern west distribution, is a set of marine volcanic, rock association be mainly andesite,
Celadon melaphyre, the light grey siltstone of a small amount of ash-of andesite basalt folder, aleuritic texture slate and calcareous phyllite；Carbonic acid
Rock salt group lithology combination is canescence thick-layer oriental alabaster, Sericite-quartz-schist, silicalite folder griotte, becomes sandstone.
(2) construct
Area's inner folds are configured to monoclinal stratum, and general dip direction east northeast moves towards northwest (NW)-east southeast.Local topography due to by
Construction influences dip direction Nan Xi.Rift structure is developed in area, is divided into northern west fracture group, east northeast to disconnected by spreading direction
Split group.
1. northern west fracture group
Group fracture is the main structure in area, is parallel to each other by a series of, nearly west fracture composition northern at equal intervals,
Trend is inclined to east northeast generally between 130-160 °, and between 50-70 °, the offlap moved towards by east northeast is cut at inclination angle.It is disconnected
Rock mass and stratum between splitting mainly have the Permian epoch like plaque-like biotite monzonitic granite, Middle Triassic epoch granodiorite and lower member
Mountain group between the Ordovician-Silurian beach that Kou Yan groups, Jinsui River Gu Jie and part location occur.It is stronger to be broken extrusion ratio, mechanical property
Show as the pressure property turned round.Group fracture is the main ore-controlling construction in area.
2. NE trending fault group
The group is broken the area Jin infield and draws one band performance of match than stronger, and development degree and its scale are far smaller than northwest (NW) west
To fracture group.The group breaks to form the fault belt of 10-50m wide, and intensive intermittent cleavage is developed in neighbouring granite, breaks
Face occurrence: 305 ° 65 ° of ∠, be brittleness reversed fault.
(3) magmatic rock
Magmatic activity is very strong in mining area, and the distribution of igneous rocks is extensive, main to be distributed Middle Triassic epoch Intermediate acidity rock,
Maximum middle distribution area is porphyritic monzonitic granite；It secondly is granodiorite；In addition diabase, Hua Gang is sporadicly distributed with
Dodge long porphyry, quartz diorite porphyrite and volcanic rock, all kinds of dyke rocks etc..Wherein shallow flesh pink porphyritic monzonitic granite outcrop area
Greater than 50km2, it is in batholith shape output, form is relatively regular strip, in northern west spread, with lineation basic one
It causes；Granodiorite outcrop area about 25km2, be in stock shape output, form is relatively regular strip, in northern west spread,
It is obvious by construction control；Middle part intrusion is between beach in mountain group stratum, and other location intrusions are in porphyritic monzonitic granite body.
(4) crypto-explosion breccia
In area and the area such as Ha Er is stopped it has been found that more than ten crypto-explosion breccias in adjacent area gram, the main output of crypto-explosion breccia in
In Middle Triassic epoch porphyritic monzonitic granite, crypto-explosion breccia form is in ellipticity in irregular, tubular etc., plane, is in more
North-northwest is greater than 350m, wide about 100m to, NW trending spread, long general 50-300m, wide general 20-50m, longest；Hidden quick-fried dust
Rock country rock is mainly porphyritic monzonitic granite, and granodiorite, monzonitic granite (Fig. 2) are seen in peripheral south, Triassic period local
E Lashan group volcanic rock overlies crypto-explosion breccia；Crypto-explosion breccia and country rock boundary line are clear, and country rock has choritization, argillization
Phenomenon.
2, element anomalies figure is drawn out using ten thousand geochemical survey of 1:5
Mainly there is at 31: 5 ten thousand hydrographic name in mining area, its feature is as follows:
(1) karr but blocks HS4First2Cu, Au (Ag, Mo) are abnormal
Abnormal to be located at the karr but area card mining area A, overall exception is in ellipticity, long axis direction approximately EW spread, each element
It is abnormal mostly irregular, and have north-northwest and east northeast to spread, long axis extension direction is controlled obviously by rift structure.It is abnormal
Element combinations are complicated, and element anomalies, which are shown, is greater than 10 kinds；Intensity is higher, and wherein Cu, Au, Bi, Mo, Zn element anomalies have super interior
Band, more than three-level concentration band.Host element is Cu, Au, is associated with the elements such as Mo, Ag, As, Bi, Sb, Pb, Zn, W, Hg, is shown
For the copper gold multiple metallic element assemblage characteristic under hydrothermal process.
(2) karr but blocks HS5First2Bi、Cu(Ag、As、Sb)、HS11First2Bi, Cu (Ag, Au, Mo) are abnormal
Extremely it is located at the karr but area card mining area B, spatial abnormal feature range, element combinations, anomaly intensity and scale, Cheng Kuang at two
Feature etc. all has similarity, therefore explains description together.
Overall exception is in ellipticity, and long axis direction approximately EW, NW trending spread, each element is abnormal mostly irregular,
And tool north-northwest, to spread, long axis extension direction is controlled obviously by rift structure.Abnormal elements combination is complicated, and wherein element is different
Often display is greater than 10 kinds；Intensity is higher, and wherein Cu, Au, Bi, Mo, Zn element anomalies have super interior band, more than three-level concentration band
(Fig. 3, Fig. 4).Host element Cu, Bi are associated with the elements such as Au, As, Ag, Mo, Sb, Pb, Zn, W, Hg, are shown as under hydrothermal process
Copper, golden multiple metallic element assemblage characteristic.Abnormal sleeving fastening degree is preferably, intensity is compared with high, scale is big.
(3) karr but blocks HS7First2Au (Hg, Mo, As) is abnormal
Abnormal to be located at the karr but area card mining area C, overall exception is in ellipticity, long axis direction approximately EW spread, each element
Abnormal mostly irregular, long axis extension direction is controlled obviously by rift structure.Abnormal elements combine based on Au, are associated with
The medium-low temperature element combinations such as Hg, Sb, Mo, Bi, Cu, Pb, Zn, Ag, As, your gold being shown as under a medium-low temperature hydrothermal process
Belong to, more Metals Deposit Ore element combinations features.Hg anomaly area is maximum in each element exception, intensity also highest, in irregular band-like
Spread, the advantage of Hg exception occurs substantially illustrating two problems in area: first is that tectonic activity is strong in reflection area；Second is that it
With ore-forming element combine in remote indication element occur, show that area's orebody buried depth is larger, the blind ore from the ore body drawn a circle to approve
Abnormal show in poor in earth's surface of Pb, Zn that body quantity accounts for about the 84% of total amount and has the characteristics that into the mine fact is confirmed.
3, magnetic survey Abnormal Map is drawn out using large scale high-precision magnetic survey
According to ten thousand magnetic data of 1:5, two major classes exception, i.e. regional anomaly and local anomaly are generally shown.It is regional
Exception is mainly distributed on the north, and range is larger, and anomaly intensity is small, and curve is gentle, and Δ T maximum generally changes in 250nT or so,
Granitic mass is distributed in abnormal interior large area, and according to physical property characteristic, regional anomaly is caused by rock mass；Local anomaly superposition
On the exception of region, it is the reflection of rock mass and contact with position magnetic substance Local enrichment, is mainly distributed on south and middle part, mine
Ten thousand magnetic survey of 1:5 finds five local anomalies of M1-M5 in area, works by ten thousand magnetic survey of 1:1, and M2 is decomposed out 6 sons extremely extremely,
M3 Abnormal Decomposition is abnormal at 15 sons, and M4 Abnormal Decomposition is abnormal at 3 sons, and M5 Abnormal Decomposition is abnormal at 3 sons.
Wherein representative magnetic anomaly is M2-2, M3-9 abnormal.
(1) M2-2 exception
Positioned at the area B the north, Near East west is moved towards, maximum width about 600m, long 1100m, anomaly intensity is big, gradient is steep, Δ
Tmax=1900nT, southern side are associated with larger negative anomaly, Δ Tmin=-4785nT.By thousand magnetic survey of 1:2, this is divided extremely
Solution is abnormal for 3 sons, number M2-2-1, M2-2-2, M2-2-3；Represent sexual abnormality wherein as M2-2-1 exception.M2-2-1 is different
Near East west is often moved towards, maximum width about 700m is about 1100m, Δ Tmax=2100nT, Δ Tmin=-6299nT.Normal anomaly one
As intensity about 1000nT, the slow north in curve south is steep, the abnormal negative anomaly big for an intensity of north band, and maximum two sides curve is substantially right
Claim, judges magnetic substance south dip；Infer that exception is caused by magnet mineralising skarns and magnet ore body.
(2) M3-9 is abnormal
According to ten thousand ground high-precision magnetic survey of 1:5 as a result, M3-9 is abnormal only to show as one more on ten thousand section plane of 1:5
The independent exception being not obvious, with surrounding M14, M15 extremely compared with, abnormal amplitude and range are all smaller, at that time simultaneously
It does not draw attention.
Ten thousand ground high-precision magnetic method result (Fig. 5) of 1:1, M3-9 abnormal show are more clear, and overall is in East and West direction spread, wide
Spend about 800m, length about 700m, southern due north is negative in plane, and abnormal morphology is more gentle, △ T maximum generally in 600nT or so,
△ T minimum is generally in -200nT.The work of IP intermediate gradient section is carried out, has occurred between 150-190 measuring point greater than 3%
Apparent chargeability is abnormal, and the abnormal section apparent resistivity amplitude is lower less than 600 Ω .m, and it is abnormal to show as apparent low resistivity and high polarization.
4, preferably emphasis pegmatite dike containing mine disposes exploratory trench, draws a circle to approve out mineralization body or ore body
(1) alteration zone and ore body
Alteration zone 3 are irised out in the abnormal area A altogether, is originated in like in plaque-like biotite monzonitic granite body, alteration zone is by fragmentation
Like plaque-like biotite monzonitic granite body and the granite aplite in later period, quartz vein composition, totally move towards northwest (NW)-east southeast to.Area
Copper mine body 30 are inside irised out altogether.
Skarn ore belt 4 are irised out in the abnormal area B altogether, originates in Middle Triassic epoch granodiorite, like the length of plaque-like biotite two
The contact site on mountain group stratum between granite and beach, it is overall to move towards northern west.Copper-molybdenum iron zinc polymetallic ore body is irised out in area altogether
105, ore body is totally in northern west spread, is coincide with anomaly distribution direction, and mother-lode scale is big, thickness stabilization, grade
It is rich.
Exceptions area is irised out containing golden No. V band of crushed zone and Pb-Zn deposits skarn ore belt VI with each one, wherein No. V contains gold
Crushed zone originates in Middle Triassic epoch granodiorite, and No. VI lead zinc alteration zone originates in Middle Triassic epoch granodiorite and Ordovician period beach
Between mountain group griotte contact site.Lead zinc-gold ore body 37 is irised out in exceptions area altogether.
(2) Feature of The Orebody
Ore body originates in the middle part of crypto-explosion breccia cylinder, and pay-rock is crypto-explosion breccia, has a small amount of ore body output in country rock.Sulphur
Compound is mainly distributed in crypto-explosion breccia cement, is mainly in disseminated mineralising, secondly visible veiny mineralising.In the dust of part
See chalcopyrite mineralization, zincblende, galena, pyritization.Ore body is totally in the form of a column, and edge is in branch-like.
Pilot survey, ore body is long to be greater than 400m, is wider than 80m, and maximum gauge is more than 200m, utilizes production-grade delineation
Single layer ore body maximum gauge is up to 114m.Cu grade is 0.29%-0.64%, and Pb grade is 0.31%-0.78%, and Zn grade is
0.67%-8.86%, local Ag grade are 66.3g/t-88.0g/t.
(3) crypto-explosion breccia feature
Dust content 40%-60% in crypto-explosion breccia, gravel diameter 3-15cm, general 3-10cm, rock cylinder inside dust is smaller,
Outside dust is larger, and dust is in irregular angular, is partially in the secondary round shape of subangular-；Dust ingredient is more complex, mainly has seemingly
Plaque-like monzonitic granite, granodiorite, rhyolite, andesite, granite porphyry etc.；Crypto-explosion breccia cement is rock powder, rock
Bits, siliceous and sulfide；Have the alterations such as sericitization, silication, choritization, carbonation, kaolinization.
(4) ore characteristic
Ore type is mainly lead zinc or silver ore, followed by copper-lead zinc or silver ore.Metalliferous mineral be mainly zincblende,
Galena, followed by chalcopyrite, pyrite etc..Gangue mineral mainly has quartz, feldspar, hornblend, biotite etc..
Ore structures are mainly xenomorphic-granular texture, and construction is mainly dust filling structures and impregnation structure, are locally
Massive structure and vein structure.
5, preferably grade height, the deployment drilling of sweeping crypto-explosion breccia carry out deep verifying, draw a circle to approve out ore body.
It is preferred that blocking and card mining area crypto-explosion breccia is cylindrical in shape, plane is in ellipticity, and NW trending spread is long to be greater than 350m,
Width about 100m；Drilling verification, ore body is long to be greater than 400m, is wider than 80m, maximum gauge is more than 200m (Fig. 6, Fig. 7), utilizes industry
The single layer ore body maximum gauge of grade delineation is up to 114m.Cu grade is 0.29%-0.64%, and Pb grade is 0.31%-
0.78%, Zn grade are 0.67%-8.86%, and local Ag grade is 66.3g/t-88.0g/t.
Vertical point of band of crypto-explosion breccia cylinder is divided into 4 facies tracts studies have shown that crypto-explosion breccia is vertical, from top under
Portion is respectively crack phase, shatter phase, explosion phase and channel phase.The crack phase dust property pieced together is strong, and dust size is generally 20-
50cm, for big person up to 2m or more, dust is rock cylinder top and avris country rock, alteration agensis, crack veiny mineralising；Shatter phase angle
Most of gravel has capable assembling, and dust size is generally 5-20cm, mainly country rock dust, major developmental carbonation, secondly
It is silication, there is dust shape to fill mineralising；Explosion is mutually the main part of breccia pipe, and the dust property pieced together is poor, and dust is opposite
Smaller, size is generally 2-5cm, and a small number of 5-15cm, dust complicated component, in addition to having the dust from country rock, there are also fundamental rocks
System and porphyry dust, major developmental silication, followed by sericitization, carbonation, disseminated, fine pulse-like mineralising；It mutually sends out in channel
It educates at the top of the small stock of quartz porphyry, dust size 0.2-1cm, mainly quartz porphyry dust, there is crack veiny mineralising.
Triassic period cryptoexplosive-breccia-rock type lead-zinc or copper deposit be formed in the collision of late Paleozoic-early Mesozoic Structural cycle
Stage, formation of ore deposits may be related with the hidden quick-fried effect occurred at the top of porphyry, control of the mineral deposit by latent porphyry and construction, ore body
Output by crypto-explosion breccia cylinder control.Ore body morphology is totally in the form of a column, and edge is in dendroid.
The foregoing is only a preferred embodiment of the present invention, the scope of protection of the present invention is not limited to this, it is any ripe
Know those skilled in the art within the technical scope of the present disclosure, the letter for the technical solution that can be become apparent to
Altered or equivalence replacement are fallen within the protection scope of the present invention.
Claims (3)
1. a kind of cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting, which comprises the following steps:
Step 1, the intermediate acidity magmatic rock for choosing extensive exposure in survey area, pass through mineralogy, geochemical Characteristics
Analysis, determine its structural environment output in syn-collision Intra-continental orogen environment；
Magmatic activity is strong in area, and the distribution of igneous rocks is extensive, and magmatic rock is Intermediate acidity rock, and main distribution is like the long flower of plaque-like two
Gang Yan, granodiorite and diabase three classes granite, porphyritic monzonitic granite distribution area is most extensive, is in batholith output；
Granodiorite and diabase are in stock output more；Rock-forming mineral is plagioclase, quartz, orthoclase, hornblend, biotite and lacks
Measure accessory mineral；Rock have high potassium calc-alkaline, aluminium supersaturation type, the feature of S I type granite, and Big ion lithophile elements enrichment,
High field side injection loses characteristic remarkable；According to geology background and digital seismograph network graphical analysis, Intermediate acidity rock output
In syn-collision Intra-continental orogen environment, Crust-mantle interaction provides power and substance source for Cu-polymetallic deposit matter；
Step 2 selects Worldview, IKONOS high-precision satellite data, and crypto-explosion breccia and middle acidity are interpreted in area reconnoitring
The feature correlation of intrusive rock is analyzed and the basis of the spatial Correlation Analysis of hydroxyl, Ferric contamination anomaly and Intermediate acidity rock
On, it is preliminary to draw a circle to approve crypto-explosion breccia spatial position；
Step 3, the crypto-explosion breccia space configuration according to the delineation, carry out ten thousand geochemical survey of 1:5, and preliminary screening is hidden quick-fried
Breccia copper-polymetallic target prospecting area；
1:5 is carried out by the crypto-explosion breccia target prospecting area for (2) passing through the delineation of Worldview, IKONOS satellite image, filtering out
Ten thousand geochemical surveys, sampling point distribution are made every effort to control charge for remittance domain to greatest extent, and sampling density is controlled in 15-20 point/km2With
It is interior；To test data using software development Cu, Au of GeoExplor and Mapgis6.7, Mo, Ag, As, Bi, Sb, Pb, Zn, W,
The element combinations Abnormal Map of Hg, and carry out commenting sequence in identical host element class, then according to Cu, Pb, Zn element anomalies feature, geology
Condition and ore-prospecting meaning size carry out anomaly classification；The Geological Achievements of bond area geologic feature, previous Geophysical-chemical, initial option
Elemental peak is high, and gradient is big, and concentration zoning, concentration center are obvious, and fitting is good, and mine target is looked in the strong abnormal delineation of Zonal regularity
Area, and carry out target area classification；
Step 4, the crypto-explosion breccia copper-polymetallic target prospecting area according to the screening, pass through large scale high-precision magnetic method
Measurement, determines that crypto-explosion breccia copper-polymetallic looks for mine clue；It is investigated again by earth's surface mineral product geology, exploratory trench is drilled into one
Sampling analysis is walked, ore body or mineral deposit are drawn a circle to approve；
1:5000 high-precision magnetic survey is carried out in the preferred target area tentatively drawn a circle to approve using step 3, cooperation；First against crypto-explosion breccia and
Country rock acquires different magnetic samples, measures magnetic parameter；Using 500 × 100m rule mesh, first calculated according to work layout drawing
The theoretical coordinate of all measuring points of every survey line is implemented using the positioning of handhold GPS, navigation feature according to each measuring point theoretical coordinate
Positioning；To starting point, endpoint, some wire sizes are marked and indicated with timber every 1000 meters, each measuring point does a wire size, coordinate, elevation
It is stored with the instrument of magnetic data；Later period arranges magnetic data, correction analysis, select anomaly intensity is big, gradient is steep, just
The more regular needle pattern of negative association, form delineation magnetic anomaly extremely, draws high-precision magnetic survey Abnormal Map；And combine geologic feature
Deduction is explained, disposes and predict to provide direct basis for later period correlation section；
Exploratory trench is disposed in conjunction with earth's surface crypto-explosion breccia Extract Mineralized Alteration, abnormal feature according to the preferred crypto-explosion breccia of step 3
Carry out exposure control；In conjunction with make an on-the-spot survey on the spot, on the basis of earth's surface mineralising and off-note carry out trenching engineering specific positioning, arrangement
It is the mineralising location that cladding thickness is no more than 3m in earth's surface the 4th, is arranged perpendicular to crypto-explosion breccia long axis direction；It is required that slot bottom
Wide to cannot be less than 0.5-0.8m, depth is not more than 3m, discloses fresh matrix and reaches 0.3-0.5m, understands that occurrence is can observe
Principle；Chemical sample slot is arranged in the joint of cell wall and slot bottom, and draws and mark sample number for sample slot on the spot with red paint, keeps away
Exempt from staged sampling, sampled using groove engraving, sample slot specification is 10 × 3cm, and example weight error rate must not be higher than 10%, sampling
When to clean sampled point rock surface, hang up properly cloth, must guarantee that sample is not contaminated and splashes mistake, acquisition method strictly presses specification
It carries out, presses same orientation, same inclination angle cloth specimen as far as possible, each sample wants end to end；It, must also be by between 2-5m in addition to chemical sample
It is controlled away from the full slot of rock-like is adopted；It disclosed by trenching work, recourse, control ore body or mineralization body, tentatively find out ore body or mineralising
Volume morphing, occurrence, scale draw a circle to approve earth's surface ore body or mineralization body.
2. the cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting according to claim 1, which is characterized in that step 2 is specific
Are as follows: pass through the predominantly middle acid porphyritic monzonitic granite of the country rock of crypto-explosion breccia in (1) area；Ten thousand remote Sensing Interpretation of 1:5 is using high
Based on resolution ratio WorldView-2 satellite image, porphyritic monzonitic granite rock mass reflex rate is higher, and reflectivity wave spectrum is bent
Line is in be bordering on to increase feature in 60nm to 1100nm range of wavelengths；It is in undulation feature in 600nm to 1050nm, occurs more
A absorption peak, absorption peak is by Fe at 630nm, 750nm, 820nm3+Ion, which generates transition of electronic energy, to be caused, and is absorbed at 1000nm
Peak is by Fe2+Ion causes, and it is related that weak ferritization occurs to rock surface；Granodiorite reflectivity is 0.5；In wavelength 600
~1000nm spectral profile is in undulation feature, Fe3+And Fe2+Absorption band separation it is good, but bands of a spectrum are faint shows rock
The content of middle iron is relatively fewer, and there may be weaker ferritizations for rock surface；It is obvious to be broken image feature, is mainly shown as
East northeast is local to cheuch, the continuous ridge changing of the relative positions, otherness microrelief, the tone contrast of different geologic bodies, linear tonal anomaly
The direct interpretation threadiness broken-rock zone in exposed bedrock location；
Select Worldview-2, IKONOS high-precision satellite image, topographic map, data statistics comprehensive means, using different waves
The image of section and combination compares research, and geologic feature carries out image solution in combined ground fact finding and studied area
The synthesis for translating mark is aided with choritization, argillization and carbonation exception with Cu-polymetallic deposit and produces spatial Correlation Analysis；Interpretation
Extract the spatial feature of crypto-explosion breccia distribution in area, scale；Due to crypto-explosion breccia catalase, by strong
Hydrothermal alteration shows as the ring image of dimly visible cyclic annular, radial fracture and tonal anomaly plaque-like composition on interpretation image,
Crypto-explosion breccia body or vein are accurately drawn a circle to approve out, and preferably mine is further looked in different scales crypto-explosion breccia body or vein conduct out
Preferred target area.
3. the cryptoexplosive-breccia-rock type Cu-polymetallic deposit method of prospecting according to claim 1, which is characterized in that further include following
Step: according to ore body or mineralising body characteristics in step 3, step 4 earth's surface, exploratory trench, preferably grade height, sweeping crypto-explosion breccia
Deployment drilling, specific boring positioning in earth's surface the enrichment of mineralization crypto-explosion breccia, and with reference to crypto-explosion breccia scale or attitude of stratum,
The factor of landform is specifically positioned；Drilling project construction is straight hole, and construction method uses large diameter directional drilling technology as far as possible, it is necessary to
Whole bore open is not less than 75mm；Ore body and its mine heart, rock core in roof and floor 3-5m are averaged taking rate not less than 80%, Hou great Kuang
Otherwise internal continuous length of portion's mine heart taking rate lower than 90% will use remedial measure, point of country rock rock core no more than 5m
The average taking rate of layer, which must not require, is lower than 80%, to ore bed or mineralized layer and its roof and floor, mineralized alteration zone, tectonic position master
It wants the geological phenomenon in location to be described in detail, and attached necessary sketch and photograph, after splitting heart sampling, also copes with important mineralising phenomenon
Do additional notes record；The drilling method of sampling is to be split along core or mine core long axis direction and mineralising uniformity for two halves, one
Half as fundamental analysis sample send measuring unit processing chemical examination, the other half is retained in case checking and research is used；In ore body or mineralising
Body must not up-sample cross-layer, sample long 1.5m, no longer than 2m, two circle side side-draw sample of ore body or mineralization body；Pass through drilling project
Crypto-explosion breccia ore body or mineralization body deep grade, thickness, scale, the situation of change of occurrence are understood, to find deep orebody
Or mineral deposit.
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