CN103760608B - Method for exploring lead zinc ore in sedimentary rock host - Google Patents
Method for exploring lead zinc ore in sedimentary rock host Download PDFInfo
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Abstract
The invention discloses a method for exploring lead zinc ore in a sedimentary rock host. The method has the advantages that exploration efficiency is high, and the exploration period is short. The method comprises the following steps that firstly, according to the geographical environment and spatial-temporal characteristics, whether a metallogenic system is a sedimentary rock host Pb-Zn-Cu multi-metal metallogenic subsystem is analyzed and judged; secondly, according to the characteristics of the sedimentary rock host Pb-Zn-Cu multi-metal metallogenic subsystem, distribution of points, collection of relevant samples and analytical research are conducted; thirdly, the clue of the lead zinc ore is determined according to a sample collection result and an analysis result in the second step; fourthly, a mineral geological survey is conducted; lastly, a trial trench is constructed and a well is drilled for further sampling analysis, and a mineralized zone or an ore body is delineated. The method for exploring the lead zinc ore in the sedimentary rock host has the advantages that the exploration efficiency is high, and the exploration period is short through implementation of the steps.
Description
Technical field
The present invention relates to survey ore deposit method, a kind of especially Sedimentary Rocks-hosted ore deposit Pb-Zn deposits side of reconnoitring for being mainly used in permafrost region
Method.
Background technology
The ore-bearing formation of permafrost region Sedimentary Rocks-hosted ore deposit lead-zinc deposit point, Ore-controlling factor and ore body exposure feature and general ground
Area is different, if being reconnoitred according to methods such as conventional soil surveying, transient electromagnetic, low resolution remote sensing, may extend and survey
Look into cycle, effect of ore-prospect be low and prospecting result is not obvious etc..
The content of the invention
The technical problem to be solved is：Offer is a kind of to reconnoitre the short Sedimentary Rocks-hosted ore deposit of efficiency high, Collate checing cycle
Pb-Zn deposits exploration method.
The technical solution adopted for the present invention to solve the technical problems is：Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method, it is special
Levy is to comprise the following steps：
A, divide and determine by survey area according to regional geological environment, Pb-Zn deposits Time And Space Distribution and genetic type of ore deposit and be
The many Metals Deposit Ore subsystems of Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu relevant with Cenozoic overthrust；
B, it is foundation according to the feature of many Metals Deposit Ore subsystems of Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu, is layouted and related sample
Product collection, analysis and research；
C, the clue that Pb-Zn deposits are determined according to sample collection, the result analyzed in step b；
D, carry out mineral product geology investigation；
E, exploratory trench, the further sample analysis of drilling well, and draw a circle to approve mineralized belt or ore body.
Layouted in step b and associated sample collection, the method integration stream sediment survey of analysis, IP intermediate gradient swept
The method of prospecting that face, geologic chemistry analysis and remote sensing information are extracted.
Stream sediment survey comprises the following steps：
First, with 1:50000 topographic maps are work hand figure, with 4-8 point/km2Sampling density sampled, and utilize
GPS is implemented field point, line, the geographical coordinate of net and is accurately determined；
Then, based on sediments sample analysis data, completed using GeoExplor and Mapgis6.7 softwares
Data processing, and draw Abnormal Map；
Then, screened on the basis of Abnormal Map, use " Geochemical Parameters computational chart " and " geochemical anomaly is commented
State table " determine that off-note combines and carries out commenting sequence in identical host element class, then according to off-note, geological conditions and look for ore deposit
Meaning size carries out abnormal ore-prospecting meaning classification；
Finally, with 1:50000 geological and mineral figures are base map, according to Class B above geochemical anomaly distribution characteristics in area,
With reference to geologic feature, conventional Geophysical-chemical, placer abnormal Geological Achievements, target prospecting area is determined.
During described IP intermediate gradient surface sweeping, IP intermediate gradient line direction should try one's best perpendicular to polarization body trend, quality structure
Make direction or perpendicular to the abnormal long axis direction of other Geophysical-chemicals.
The sampling network degree of geo-electrochemistry analysis is 100 × 20m.
The invention has the beneficial effects as follows：The Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method of the present invention, integrated sediments are surveyed
The enforcement of the method for prospecting that amount, IP intermediate gradient surface sweeping, geologic chemistry analysis and remote sensing information are extracted, with reconnoitring efficiency high,
The short advantage of Collate checing cycle.
Specific embodiment
With reference to specific embodiment, the invention will be further described, but protection scope of the present invention be not limited to it is following
It is described.
The Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method of the present invention, it is characterised in that comprise the following steps：
A, divide and determine by survey area according to regional geological environment, Pb-Zn deposits Time And Space Distribution and genetic type of ore deposit and be
The many Metals Deposit Ore subsystems of Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu relevant with Cenozoic overthrust；Described geological environment is
The geological structures of geological changes, such as the north of the Changjiang River section of Qinghai three experienced late Paleozoic-morning Mesozoic PaleoTethyan evolution,
It is Yin-Asia continental collision orogeny evolutionary phase since the Cenozoic, overall to hand over mutual geological tectonic environment in marine facies and sea-land；Institute
The Time And Space Distribution stated refers to the time and Space Elements to form survey area geologic feature, such as survey area is spatially located in green grass or young crops
Hide plateau northern, and in Cenozoic Strike pull-apart basin, construct to there is obvious control action into ore deposit；Jing in time
The late Paleozoic is gone through to long time sedimentation process of new generation, sedimentary rock and volcanic rock of the exposure stratum since the Carboniferous Period, the Carboniferous Period-
The Permian Period is marine deposit, Triassic period-Jurassic Period is that deposition mutually is handed in marine facies and sea-land, stratum is heavy for terrestrial facies since the Cretaceous period
Product.
B, it is foundation according to the feature of many Metals Deposit Ore subsystems of Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu, is layouted and related sample
Product collection, analysis and research, the feature of many Metals Deposit Ore subsystems of Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu is the main exposure in stratum from coal
Sedimentary rock and volcanic rock since discipline, the Carboniferous Period-Permian Period is marine deposit, Triassic period-Jurassic Period is that marine facies and sea-land is handed over
Deposit mutually, stratum is continental deposit since the Cretaceous period.The formation in Pb-Zn-Cu mineral deposits does not show significantly with foreland basin
Metallogenic relations, mineral deposit ore body substantially by the secondary fragmentation crushed zone control in thrust and nappe tectonic belt, shows and regionality
Opposite-flushing type thrust and nappe has close genetic relationship.The lateral orogenesis of thrust and nappe, generates normal or superelevation
The basinal hot brine fluid of pressure, fluid along region thrust bottom detachment zone long-distance migration, in transition process,
Fluid is had an effect with region carbonate formation, is saturated Pb, Zn element therein.And entered by thrust faults in mining area
Mining area, makes limestone formation that dolomitized occur and disk ruptured zone, the concordant of near Faults and hierarchical level crack is cut on reversed fault
Sulfide, forming layer control ore body have been precipitated Deng filling in open space.
C, the clue that Pb-Zn deposits are determined according to sample collection, the result analyzed in step b；
D, carry out mineral product geology investigation；
E, exploratory trench, the further sample analysis of drilling well, and draw a circle to approve mineralized belt or ore body.
Layouted in step b and associated sample collection, the method integration stream sediment survey of analysis, IP intermediate gradient swept
The method of prospecting that face, geologic chemistry analysis and remote sensing information are extracted.The Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method of the present invention, collection
The enforcement of the method for prospecting extracted into stream sediment survey, IP intermediate gradient surface sweeping, geo-electrochemistry analysis and remote sensing information, tool
Reconnoitre efficiency high, the short advantage of Collate checing cycle.
Described stream sediment survey refers to area's Study of Platycladus orientalis-Robinia pseudoacacia condition, geology and Geochemical Characteristics as foundation, carries out
Layout and associated sample collection, analysis and research work；With 1:50000 topographic maps are work hand figure, and sampling density control is at 4-8
Point/km2Within；Exceptions area band or known mineralising location are made suitably pass point to control, and sampling point distribution is made every effort to control to greatest extent
Charge for remittance domain, takes into account the uniform Reasonable Arrangement of sampling point;The monitoring of GPS flight paths is implemented in stream sediment survey's field sampling, using GPS receiver
Machine is implemented field point, line, the geographical coordinate of net and is accurately determined, it is ensured that the accuracy of sample in geochemistry work;Data
Process is based on sediments sample analysis data, to be completed using softwares such as GeoExplor and Mapgis6.7;In group
On the basis of closing Abnormal Map, all exceptions of the whole district are being screened.Close and use " Geochemical Parameters computational chart " after abnormal delimitation
And " geochemical anomaly commentary table " determines the off-note combination i.e. combination of host element and accompanying element and carries out identical pivot
Sequence is commented in plain class, then abnormal ore-prospecting meaning classification is carried out according to off-note, geological conditions and ore-prospecting meaning size；With 1:
50000 geological and mineral figures are base map, according to Class B above geochemical anomaly distribution characteristics in area, with reference to geologic feature, in the past
The Geological Achievements such as Geophysical-chemical, placer abnormal, determine target prospecting area, the analysis and research regularity of ore formation and ore-searching potential, according to looking for before ore deposit
Scape and the relative size for looking for ore deposit certainty, point A, B, C three-level, and represented with not synteny.
Described IP intermediate gradient surface sweeping is referred to is powered by artificial field source to underground, in the case where supply current is constant,
Potential difference between two measuring electrodes of earth's surface is increased over, and a certain saturation value is reached over time, after power-off, measurement electricity
A potential difference reduced with the time is yet suffered between pole, and its potential difference decay goes to zero after the long duration.It is this
The process of the additional electric field for changing over and producing produced by effect of induced polarization is referred to as charge and discharge process, it is characterized in that
After power supply, the complementary field attached time finally reaches saturation from fast to slow;Decay from fast to slow with the time after power-off, finally go to zero.
Described geo-electrochemistry analysis refers to the geochemistry based on the ion homeostasis state in subsurface rock
Method.The electrochemical dissolution effect of ore and lysed ion, migrate upwards and are formed at measuring point product in the case where electric current drives
It is tired.By determining accumulation rule over time, you can indicate concealed orebody preservation position and relative size.In rock from
Son, great majority are, with the presence of complex ion state, in the presence of artificial electric field, to form dissociation, artificially promote unit
Element is enriched in element receiver, through the test analysis to sample in element receiver, obtains indicator element on each measuring point
Changes of contents rule, so as to reach the purpose in Detecting Hidden mineral deposit.
Described remote sensing information is extracted and refers to remote sensing sources from satellite data and ETM+ multi-wavelength datas.Satellite data
It is mainly used in high-resolution remote sensing image figure and processes making and remote sensing geology man computer interactive interpretation.ETM+ multi-wavelength datas are mainly used
In Information extraction, while its panchromatic wave-band also can be used as image co-registration and the assistance data of GEOLOGICAL INTERPRETATION;From satellite
Data carry out the microcosmic interpretation of appearance ore deposit, ore-controlling structure and lithology, and IKONOS satellite data ground resolutions 0.82m, panchromatic 1m is more
Spectrum 4m, meets the requirement of 1: 10000 remote sensing mapping.Play the maximum efficiency of remote sensing.By remote Sensing Interpretation mineral product geology
The mineral products spatial Correlation Analysis such as the mineral products correlation analysis such as feature and copper-lead zinc, hydroxyl, Ferric contamination anomaly and copper-lead zinc, explore weight
Remote sensing geology Minerals characteristic in point area, the inner link between remote sensing abnormal and mineral products.In comprehensive analysis remote Sensing Interpretation and remote sensing
On the basis of off-note, to predict that the mineral resources such as copper-lead zinc are direct purpose, delineation remote sensing prediction area.
Described ETM+ multi-wavelength datas are the image datas acquired in a kind of enhancement mode special topic drawing imager.ETM+ is more
Wave band data includes 8 wave bands, and wherein B1 is blue wave band, and the wave band is located at the minimum position of water body attenuation coefficient, to water body
Penetration power it is maximum, for differentiating the depth of water；B2 is green band, and the wave band is located near the reflection peak of green plants, to health
Luxuriant plant reflection sensitive；B3 be red wave band, the wave band be located at chlorophyllous prominent absorption bands, can be used for distinguish vegetation type,
Coverage, judge vegetation growth state etc.；B4 is near infrared band, and the wave band is located at the high-reflection region of plant, is reflected a large amount of
Plant information, be used for plant identification, classification；B5 is short infrared wave band, the wave band be located at two water body absorption bands it
Between, it is sensitive to plant and soil water content；B6 is Thermal infrared bands, and the wave band is sensitive to atural object heat radiation；B7 is shortwave
Wave section, wavelength ratio B5 is big, is to aim at the additional wave band of geologic survey, and the wave band is sensitive to rock, certain minerals reaction, is used for
Main rock type, rock hydro-thermal alteration are distinguished, clay mineral relevant with explanation rock etc. is detected；B8 is panchromatic wave-band, should
The spectral region that wave band is covered is wider, and spatial resolution is high compared with its all band, thus is used for obtaining the geometric properties on ground.
Wherein described stream sediment survey comprises the following steps：
First, with 1:50000 topographic maps are work hand figure, with 4-8 point/km2Sampling density sampled, and utilize
GPS is implemented field point, line, the geographical coordinate of net and is accurately determined, it is notable that exceptions area band is referred to by conventional
Achievement data shows and suitably pass point can be controlled with many metal exceptions areas or mineralising section or known mineralising location work that sampling point divides
Cloth makes every effort to control charge for remittance domain to greatest extent, it is desirable to be not that requirement is all disposed within lattice of sampling all sampled points using being evenly distributed
The central authorities of son, it is required that sampled point is arranged in each grid can control to greatest extent at catchment area.Therefore sample
Point should try one's best and be arranged on topographic map the minimum water system that can be recognized（More than 300m）--- i.e. the end of first-order stream and
On branch's water system mouth.If water system is longer should also to increase sampled point in the middle of water system, the charge for remittance of each sampled point control is made
The area in basin is substantially in 0.25-0.125km2Between, more than 0.25km2Should increase sampled point, less than 0.125km2Can
Sampled point is reduced, the uniform Reasonable Arrangement of sampling point is taken into account；
Then, based on sediments sample analysis data, completed using GeoExplor and Mapgis6.7 softwares
Data processing, and Abnormal Map is drawn, described Abnormal Map is referred to 1：50000 topographic maps determine sampled point point position, then basis
The Example Test Data of fixed point point position carries out element anomalies classification, draws a circle to approve identical element closed curve, forms single element Abnormal Map,
Also composite component Abnormal Map can be formed.
Then, screened on the basis of Abnormal Map, use " Geochemical Parameters computational chart " and " geochemical anomaly is commented
State table " determine that off-note combines and carries out commenting sequence in identical host element class, then according to off-note, geological conditions and look for ore deposit
Meaning size carries out abnormal ore-prospecting meaning classification；
Finally, with 1:50000 geological and mineral figures are base map, according to Class B above geochemical anomaly distribution characteristics in area,
Can state the various parameters of geochemical anomaly feature and the general name of key element, such as anomaly intensity, scale, form, element combinations,
Concentration center, concentration gradient and point band, component point band, pedigree feature etc., with reference to geologic feature, conventional Geophysical-chemical, placer abnormal
The higher area of heavy sand content, be one of important indicator for deposit.Delineation placer abnormal, is in research placer mineral comprehensively
On the basis of the features such as crystalline form, content, paragenetic association, physics and chemical property, spatial distribution, geology with reference to operational area,
The comprehensive study work that landforms, hydrologic condition are carried out, determines target prospecting area.Described conventional Geophysical-chemical refers to the ore deposit collection
Area or mineralising section geology background, mineral deposit point geologic feature, ore factor and ore control factor；And conventional different scale
Geophysics, geochemical anomaly.Described placer abnormal refers to some valuable minerals or and ore deposit by heavy sand discovery
Produce closely related index mineral.
During described IP intermediate gradient surface sweeping, IP intermediate gradient line direction should try one's best perpendicular to polarization body trend, quality structure
Make direction or perpendicular to the abnormal long axis direction of other Geophysical-chemicals, described polarization body is the geologic body that can cause polarity effect.
By IP intermediate gradient surface sweeping, the Mineralization Features in deep are understood, be mining area next step mineral exploration engineering construction and Exploration right investigation stage
Upgrading reduces area and provides foundation.
The sampling network degree of geo-electrochemistry analysis is 100 × 20m.
Finally it should be noted that：Above example only to illustrate technical scheme, rather than a limitation；Although
The present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：In specification
Its still the technical scheme described in foregoing embodiments can be modified, or which part technical characteristic is carried out
Equivalent, does not make the spirit and scope of the essence disengaging various embodiments of the present invention technical scheme of appropriate technical solution.
Claims (3)
1. Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method, it is characterised in that comprise the following steps：
A, divided according to regional geological environment, Pb-Zn deposits Time And Space Distribution and genetic type of ore deposit and determine by survey area be with newly
Life is for many Metals Deposit Ore subsystems of relevant Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu of thrust and nappe；
B, it is foundation according to the feature of many Metals Deposit Ore subsystems of Sedimentary Rocks-hosted ore deposit Pb-Zn-Cu, is layouted and associated sample is adopted
Collection, analysis and research；
C, the clue that Pb-Zn deposits are determined according to sample collection, the result analyzed in step b；
D, carry out mineral product geology investigation；
E, exploratory trench, the further sample analysis of drilling well, and draw a circle to approve mineralized belt or ore body；
Layouted in step b and associated sample collection, analysis method integration stream sediment survey, IP intermediate gradient surface sweeping,
The method of prospecting that geologic chemistry is analyzed and remote sensing information is extracted；
Stream sediment survey comprises the following steps：
First, with 1:50000 topographic maps are work hand figure, with 4-8 point/km2Sampling density sampled, and connect using GPS
Receipts machine is implemented field point, line, the geographical coordinate of net and is accurately determined；
Then, based on sediments sample analysis data, data are completed using GeoExplor and Mapgis6.7 softwares
Process, and draw Abnormal Map；
Then, screened on the basis of Abnormal Map, use " Geochemical Parameters computational chart " and " geochemical anomaly is commented
Table " determines that off-note combines and carries out commenting sequence in identical host element class, then according to off-note, geological conditions and looks for ore deposit to anticipate
Adopted size carries out abnormal ore-prospecting meaning classification；
Finally, with 1:50000 geological and mineral figures are base map, according to Class B above geochemical anomaly distribution characteristics in area, with reference to
Geologic feature, conventional Geophysical-chemical, placer abnormal Geological Achievements, determine target prospecting area.
2. Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method according to claim 1, it is characterised in that：Described IP intermediate gradient is swept
During face, IP intermediate gradient line direction should try one's best perpendicular to the trend of polarization body, geologic trend or perpendicular to other Geophysical-chemicals
Abnormal long axis direction.
3. Sedimentary Rocks-hosted ore deposit Pb-Zn deposits exploration method according to claim 1, it is characterised in that：What geologic chemistry was analyzed adopts
Sample net degree is 100 × 20m.
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| CN108802830A (en) * | 2018-04-17 | 2018-11-13 | 青海省地质矿产勘查开发局 | Ore searching method for melting nickel ore by using mountain-making type magma |
| CN109188560A (en) * | 2018-09-12 | 2019-01-11 | 中山大学 | Mineral products emphasis Target area Study of Geochemical Anomalies method |
| CN112288243B (en) * | 2020-10-19 | 2021-07-23 | 中国煤炭地质总局勘查研究总院 | Method and device for evaluating associated metal resources in coal |
| CN114240081B (en) * | 2021-11-26 | 2023-04-07 | 成都理工大学 | Mineralization characteristic quantification system and method |
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