CN110118995A - Hidden polymetallic ore prospecting method - Google Patents
Hidden polymetallic ore prospecting method Download PDFInfo
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- CN110118995A CN110118995A CN201910353299.1A CN201910353299A CN110118995A CN 110118995 A CN110118995 A CN 110118995A CN 201910353299 A CN201910353299 A CN 201910353299A CN 110118995 A CN110118995 A CN 110118995A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/40—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for measuring magnetic field characteristics of the earth
Abstract
The invention discloses a hidden polymetallic ore prospecting method. The method utilizes a rock debris geochemistry, an induced gradient scanning plane and a controllable source audio magnetotelluric sounding method to survey the hidden multi-metal ore bed controlled by a fracture structure, firstly selects a favorable multi-metal ore forming area according to a geological ore forming rule, and then utilizes rock debris geochemistry to measure and define a multi-element combination abnormal group; then, in the multi-element combined abnormal group area, a multi-metal ore occurrence area is defined by utilizing the scanning surface of the power-exciting escalator; and finally, in the polymetallic ore occurrence area, a high-resistance mineralization alteration zone is determined by using a controllable source audio magnetotelluric sounding coil. The invention has the characteristics of accurate hidden deposit position identification and obvious mineral finding effect. The method realizes the ore finding breakthrough of the tin-silver-zinc-copper-lead polymetallic ore hidden under loose sediments in the internal Mongolia Baiyin dry-investigation Dongshan mine area.
Description
Technical field
The present invention relates to the buried ore of geologic prospect look for mine technical field more particularly to it is a kind of controlled by rift structure it is hidden
The more metal methods of prospecting of deep-sited pulse shape.
Background technique
Mineral resources are the important material base of socio-economic development, 95% or more the energy of the mankind, 80% or more work
The agricultural production raw material of industry raw material and 70% or more both is from mineral resources.Mineral Resources in China total amount is big, but per capita less, natural endowment
Difference, large, pillar mineral products deficiency.As socio-economic development maintains sustained and rapid growth to mineral resources demand, China is large
Supply falls short of demand for mineral resources, if copper external dependence degree is up to 70% or so, seriously threatens national resources security.However, due to appearing
The mineral deposit that mine, superficial part mine etc. are easily found is fewer and fewer, and modern mineral exploration is had to latent in face of what is be difficult to find and identify
Mine, deep mine, the mature footrail geo-exploration technology of tradition is hard to work, and technical research is extremely urgent！
For exposure in the mineral resources of earth's surface, people mainly observe by the naked eye discovery ore body, then implement engineering
It is verified and is exploited.But for the blind deposit for being covered by unconsolidated sediment, earth's surface observation is ineffective, must
It must be by means of effective geochemistry and geophysical method.The present invention is solved by lot of experiments and exploration practices
The key technology difficulty of Hidden Areas Polymetallic Mineralization Belt.Concealed Polymetallic Deposits for pushing China's complexity look for mine, promote resource
Degree of protection is of great significance.
Summary of the invention
It is an object of the invention to solve how to differentiate Hidden Areas polymetallic ore preservation position problems, provide a kind of latent more
The metallic ore method of prospecting.The present invention is with landwaste geochemistry, IP intermediate gradient surface sweeping and controlled source audio magneto telluric
Based on, using latent tin silver-colored zinc copper-lead polymetallic ore as target, by lot of experiments and exploration practices, propose differentiation
The method of Hidden Areas polymetallic ore preservation position realizes exploration breakthrough, and this method is accurate with target area selection, prospecting result is good
The features such as.
The technical scheme is that a kind of Concealed Polymetallic Deposits method of prospecting, characterized in that " landwaste is geochemical for utilization
+ IP intermediate gradient surface sweeping+controlled-source audiomagnetotellurics sounding " method reconnoitres the Concealed Polymetallic Deposits controlled by rift structure
Bed, the method for looking for mine are as follows:
(1) advantageous polymetallic ore minerogenetic province is selected according to the geology regularity of ore formation
The main geologic of advantageous polymetallic ore minerogenetic province screening is flagged with: being located at known metallogenic belt and large-scale ore field model
It encloses, there is large ore deposit on periphery；There is the Stage of Yanshan granite porphyry being distributed in small stock or apophysis；There is approximately EW (to incline with East and West direction
Oblique angle is not more than 15 degree) Ore Control of Fault construction, fracture Local topography, which occurs to open, turns round sexuality.
(2) in advantageous polymetallic ore minerogenetic province, multielement anomaly association group is drawn a circle to approve using debris geochemistry ore prospect
In advantageous polymetallic ore minerogenetic province, by that can indicate subterrane element contained by the system acquisition area of coverage
The rock debris of feature carries out 1:10000 debris geochemistry ore prospect, works out geochemical map using measurement data, irises out more
Element combinations exception group indicates polymetallic ore preservation area.Identification polymetallic ore main indicator be: ore-forming element Ag, Cu, Pb,
Zn abnormal morphology is complete, and abnormal change of gradient is big, and concentration center is clear, and the average content of each element is high, the content of Partial Elements
Reach or approach production-grade (its content be production-grade content >=85%), swoon elements A s, Sb, Bi exception fitting with leading edge
It is good；The abnormal ribbon extended in orientation.
(3) in multielement anomaly association group region, polymetallic ore preservation area is drawn a circle to approve using IP intermediate gradient surface sweeping
In multielement anomaly association group region, 1:10000 IP intermediate gradient surface sweeping measurement is carried out, isopleth plan view is formed,
It is limited with 10ms, irises out high apparent chargeability value area.The main indicator in polymetallic ore preservation area is: in high apparent chargeability value area, with
22ms is that lower limit draws a circle to approve apparent chargeability exception, and highest apparent chargeability value is 35ms；Apparent chargeability is in the band that orientation extends extremely
Shape a string of bead anomaly band, single exception length-width ratio 2:1~5:1.
(4) in polymetallic ore preservation area, high resistant mineralized alteration zone is drawn a circle to approve using controlled-source audiomagnetotellurics sounding
Carry out controlled-source audiomagnetotellurics sounding in polymetallic ore preservation area, delineation high resistant is abnormal opposite with low-resistance region
High resistance region, is the reflection for mineralized alteration zone, and most ore bodies originate in the opposite of high resistant exception edge part and low-resistance region
High resistance region (region numerical value >=150 Ω .m is opposite high resistance region in low-resistance region).The numerical value of high resistant exception be 850~
1300 Ω .m, the numerical value of low resistance region is less than 150 Ω .m.High resistant is in high dipping beading, ribbon spread extremely, is indicated
The occurrence of Ore-control fault and mineralized alteration zone.
The cardinal principle of Polymetallic Mineralization Belt method in Hidden Areas of the present invention is as follows:
(1) element geochemistry is dizzy.Polymetallic deposit is the mine since the elements Local enrichment such as Sn, Ag, Zn, Cu, Pb forms
Bed remains high characteristics of minerogenetic elements in the landwaste in covering thereon unconsolidated sediment, and formed by after weathering and erosion
Influence a certain range of geochemical halo.To landwaste sampling analysis, the exceptions area of ore-forming element enrichment is irised out, position can be with
Indicate the primary polymetallic deposit to underlie.
(2) rock, ore physical difference.Different type rock, the characteristics of physical parameters of ore are different, therefore can use
Geophysical method identifies the rock of different physical property characteristics, ore.Polymetallic deposit has strong pyritization and silication, therefore
The polarizability and resistivity value of ore are high, it can effectively be sentenced by swashing method for electrically and control source audio telluric electromagnetic sounding method
Not.For example, the electrical parameter measurement result that Inner Mongolia white tone looks into the rock in dry Dongshan mining area and ore carries out see the table below 1.By
Table 1 is not as it can be seen that tufa stone, andesite, granite porphyry, silication pelite polarizability average value is high in area, less than 1.00%；Stream
Line rock polarizability average value is 1.29%；And pelite polarizability average value is 18.85%, maximum value is up to 33.91%, resistance
Rate value is in 51~7334 Ω2Between m；Galena polarizability average value is 15.75%, and up to 37.87%, resistivity value exists maximum value
104~358732 Ω2Between m.
1 Inner Mongol white tone of table looks into dry Dongshan mining area physical property characteristic table
Of the invention mainly has the beneficial effect that: surface occurence mine mainly observes by the naked eye discovery ore body.The present invention
Utilization " landwaste geochemistry+IP intermediate gradient surface sweeping+controlled-source audiomagnetotellurics sounding " is created to reconnoitre by rift structure control
The Concealed Polymetallic Deposits bed method of prospecting of system, the present invention have the characteristics that identify that blind deposit position is accurate, prospecting efficiency is obvious.
Looking into dry Dongshan mining area in Inner Mongolia White sound using the present invention realizes how golden lie concealed tin silver-colored zinc copper-lead under unconsolidated sediment
Belong to the exploration breakthrough of mine.
Detailed description of the invention
Fig. 1 is mining area geological map of bed rocks；
Fig. 2 is landwaste geochemical anomaly map；
Fig. 3 is IP intermediate gradient geophysical anomaly figure；
Fig. 4 is III -8 line CSAMT depth measurement inverting geoelectric cross section figure；
Fig. 5 is No. III fracture mineralized alteration zone ore body composite profile figure.
Specific embodiment
Dry Dongshan tin silver-colored zinc copper-lead Polymetallic Mineralization Belt example is looked into below with reference to Inner Mongol white tone to carry out the present invention program
It is described in detail.
The first step selects Inner Mongol white tone to look into dry Dongshan polymetallic ore and looks for miner to make at the deployment of mine range of profitability.This ground
Area is located at the big well polymetallic mineralization belt of the Daxinganling, Inner Mongolia Paleozoic Era-Middle Cenozoic polymetallic area Huang Gangliang-, week
Side hairiness steps on tin copper deposit, Dajing tin-polymetallic deposit, white tone muir lead-zinc deposit and Bayern up to dam Ag-pb-zn Deposit etc.；It is surveying
The granite porphyry apophysis of Stage of Yanshan is distributed in the west and south for looking into area；The tension fracture for having nearly EW trend in the middle part of area is reconnoitred, and by NE
To fracture bad break (Fig. 1).These Beneficial Ore-forming marks illustrate the polymetallic ore minerogentic condition that the area has had.
Second step looks into dry Dongshan area in white tone and completes 17.62km21:10000 landwaste geochemistry sampling and survey
Examination, sampling interval 40m, using block sampling is continuously picked up, sampling depth is more than or equal to 30cm, around the sampled point within the scope of 1~5m
Dig 2~3 pitting combination acquisition chip samples.Geochemical map is worked out using Example Test Data, it is different to iris out multielement composite
At normal group 1, the multielement composite for forming an approximately EW spread by ore-forming element Ag, Cu, Pb, Zn and As, Sb, Bi is abnormal
Group (Fig. 2).Each element anomaly area is larger, and continuity is preferable, is about 2 ㎞, wide about 1 ㎞.Wherein Ag, Cu, Pb, Zn exception shape
State is complete, and abnormal change of gradient is big, and concentration center is clear, and the average content of each element is high, and the content of Partial Elements reaches or connects
Nearly production-grade is got togather with leading edge elements A s, Sb, Bi set extremely of swooning.
Third step implements 9.452km within the scope of 1:10000 geochemical anomaly21:10000 IP intermediate gradient surface sweeping
Measurement.Central gradient array, time-domain induced polarization method are selected in induced polarization measurement work.Power supply AB pole span is 3000m, measures MN
Pole span is 40m, and point observes range of the section AB away from centre 2/3 away from 40m, and from≤400m (AB/5), the power supply phase is for maximum other ranging
32 seconds.Field inspection instrument is that the U.S. produces GDP-32 II, and observed parameter is apparent chargeability, and calculates apparent resistivity.According to observation
As a result numerical value isogram is made.It is limited with apparent chargeability 10ms, irises out 4 high apparent chargeability value areas in area reconnoitring, and
In this four Spring layers, using apparent chargeability 22ms as lower limit, apparent chargeability value is that 35ms is the upper limit, irises out apparent chargeability abnormal 6
Place, number DJ1, DJ2, DJ3, DJ4, DJ5, DJ6 (Fig. 3).These exceptions are in the ribbon a string of bead anomaly band that orientation extends,
Single exception length-width ratio 2:1~5:1, thus it is speculated that be polymetallic ore preservation region.
4th step, in polymetallic ore preservation area, apparent chargeability is abnormal at 6, vertical apparent chargeability exception long axis direction
Controlled-source audiomagnetotellurics sounding section is laid, CSAMT data collecting card Buddhist nun Asia resistivity is carried out.Use U.S. ZONGE public affairs
Take charge of the multi-functional electrical method work station of II type of GDP-32 and GGT-30 high-power transmitter system of production, minimum voltage detectability
For 0.03 microvolt, phase accuracy is within 0.1 milliradian.It is irised out in 10 high resistant mineralized alteration zones and a plurality of low-resistance region altogether
The numerical value of relatively high resistance body, high resistant exception is 850~1300 Ω .m, and the numerical value of low resistance region is less than 150 Ω .m.High resistant is in extremely
High dipping beading, ribbon spread, indicate the occurrence of Ore-control fault and mineralized alteration zone.Such as I -2-2 high resistant mineralising
Alteration zone, between 230~234/ I 15. -414~422/ IV 31 points, long 1400m, wide 120m, east-west direction spread, top plate
Buried depth is 100m, deepening 400m, is inclined to substantially 165 °.The abnormal opposite high resistance region with low-resistance region of above-mentioned high resistant is mineralising erosion
The reflection of variable speed, through with exploration Comparative result, most ore bodies originate in the relatively high of high resistant exception edge part and low-resistance region
It hinders region (Fig. 4).
It looks into dry Dongshan tin silver-colored zinc copper-lead Polymetallic Mineralization Belt in Inner Mongolia White sound, is drawn a circle to approve using the above method of the invention
Latent polymetallic ore body (Fig. 5) is controlled through drilling verification and deep, irises out 3 fracture mineralized alteration zones, is visited and has been obtained 214
A ore body has verified ultra-large type polymetallic deposit.Confirm that the method for prospecting of the invention is effective.
Claims (9)
1. a kind of Concealed Polymetallic Deposits method of prospecting, characterized in that utilize landwaste geochemistry+IP intermediate gradient surface sweeping+controllable source
Audio Magnetotelluric Souding method reconnoitres the Concealed Polymetallic Deposits bed controlled by rift structure, the method for looking for mine are as follows:
(1) advantageous polymetallic ore minerogenetic province is selected according to the geology regularity of ore formation；
(2) in advantageous polymetallic ore minerogenetic province, using debris geochemistry ore prospect and multielement anomaly association group is drawn a circle to approve；
(3) in multielement anomaly association group region, polymetallic ore preservation area is drawn a circle to approve using IP intermediate gradient surface sweeping；
(4) in polymetallic ore preservation area, high resistant mineralized alteration zone is drawn a circle to approve using controlled-source audiomagnetotellurics sounding.
2. a kind of Concealed Polymetallic Deposits method of prospecting as described in claim 1, characterized in that the step 1) is advantageous mostly golden
The main geologic for belonging to the screening of mine minerogenetic province is flagged with: being located at known metallogenic belt and large-scale ore field range, there is large ore deposit on periphery；
There is the Stage of Yanshan granite porphyry being distributed in small stock or apophysis；There is approximately EW Ore Control of Fault construction, is broken Local topography
It opens and turns round sexuality.
3. a kind of Concealed Polymetallic Deposits method of prospecting as described in claim 1, characterized in that the step 2) is advantageous more
Metallic ore minerogenetic province, by that can indicate the rock debris of subterrane elemental characteristic contained by the system acquisition area of coverage, and
Geochemical survey is carried out, geochemical map is worked out using measurement data, irises out multielement anomaly association group, indicate polymetallic ore
Preservation area.
4. a kind of Concealed Polymetallic Deposits method of prospecting as claimed in claim 3, characterized in that the step 2) identifies more metals
The main indicator in mine preservation area is: ore-forming element Ag, Cu, Pb, Zn abnormal morphology is complete, and concentration center is clear, and each element is put down
Equal content is high, and the content of Partial Elements reaches or approaches production-grade, gets togather with leading edge elements A s, Sb, Bi set extremely of swooning；It is abnormal
The ribbon extended in orientation.
5. a kind of Concealed Polymetallic Deposits method of prospecting as described in claim 1, characterized in that the step 3) is in multielement group
Abnormal group region is closed, IP intermediate gradient surface sweeping measurement is carried out, isopleth plan view is formed, is limited with 10ms, irises out high apparent chargeability
It is worth area.
6. a kind of Concealed Polymetallic Deposits method of prospecting as claimed in claim 5, characterized in that the step 3) polymetallic ore is assigned
The main indicator for depositing area is: in high apparent chargeability value area, using 22ms as lower limit, highest apparent chargeability value is 35ms, is drawn a circle to approve depending on filling
Electric rate is abnormal；Apparent chargeability is in the ribbon a string of bead anomaly band that orientation extends extremely, single exception length-width ratio 2:1~5:1.
7. a kind of Concealed Polymetallic Deposits method of prospecting as described in claim 1,5 or 6, characterized in that the step 4) is more
Metallic ore preservation area carries out controlled-source audiomagnetotellurics sounding, and the abnormal opposite high resistance region with low-resistance region of delineation high resistant is
For the reflection of mineralized alteration zone.
8. a kind of Concealed Polymetallic Deposits method of prospecting as claimed in claim 7, characterized in that the numerical value of the high resistant exception is
850~1300 Ω .m, the numerical value of low resistance region is less than 150 Ω .m.
9. a kind of Concealed Polymetallic Deposits method of prospecting as claimed in claim 8, characterized in that high resistant is in high dipping string extremely
Pearl, ribbon spread, indicate the occurrence of Ore-control fault and mineralized alteration zone.
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Cited By (11)
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| CN110632669A (en) * | 2019-09-05 | 2019-12-31 | 山东省地质矿产勘查开发局第六地质大队 | Method for prospecting vein-like lead-zinc silver ore in magma active region with complex structure |
| CN110824582A (en) * | 2019-11-22 | 2020-02-21 | 马忠元 | Comprehensive exploration method for polymetallic minerals |
| CN111596373A (en) * | 2020-07-20 | 2020-08-28 | 核工业航测遥感中心 | Method for rapidly searching concealed medium-low temperature hydrothermal type copper polymetallic ore |
| CN111736225A (en) * | 2020-06-11 | 2020-10-02 | 中化地质矿山总局地质研究院 | Medium-low temperature hydrothermal liquid filling type fluorite ore exploration method and exploration device |
| CN112083499A (en) * | 2019-12-04 | 2020-12-15 | 安徽省勘查技术院(安徽省地质矿产勘查局能源勘查中心) | Comprehensive geophysical well logging method and system for searching metal ore |
| CN112255691A (en) * | 2020-11-09 | 2021-01-22 | 高军 | Method for detecting deep fracture geology by induced polarization composite frequency |
| WO2021073421A1 (en) * | 2019-10-18 | 2021-04-22 | 中国科学院地质与地球物理研究所 | Concealed resource prediction method and rock electromagnetic logging system |
| CN112799142A (en) * | 2020-12-30 | 2021-05-14 | 核工业北京地质研究院 | Mineral combination prediction method for uranium, molybdenum and lead multi-metal mineralization |
| CN113759434A (en) * | 2021-09-07 | 2021-12-07 | 中国有色桂林矿产地质研究院有限公司 | Ore finding method for tracking primary mineralization outcrop based on rock debris micro-point information |
| CN113946950A (en) * | 2021-10-12 | 2022-01-18 | 青海省第三地质勘查院 | Method for rapidly delineating target area of gold prospecting |
| CN115113297A (en) * | 2022-07-25 | 2022-09-27 | 昆明理工大学 | Method for determining lateral voltage direction and spatial positioning of deep ore body of hydrothermal polymetallic ore bed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110632669A (en) * | 2019-09-05 | 2019-12-31 | 山东省地质矿产勘查开发局第六地质大队 | Method for prospecting vein-like lead-zinc silver ore in magma active region with complex structure |
| WO2021073421A1 (en) * | 2019-10-18 | 2021-04-22 | 中国科学院地质与地球物理研究所 | Concealed resource prediction method and rock electromagnetic logging system |
| CN110824582A (en) * | 2019-11-22 | 2020-02-21 | 马忠元 | Comprehensive exploration method for polymetallic minerals |
| CN112083499B (en) * | 2019-12-04 | 2024-02-20 | 安徽省勘查技术院(安徽省地质矿产勘查局能源勘查中心) | Comprehensive geophysical well logging method and system for searching metal ores |
| CN112083499A (en) * | 2019-12-04 | 2020-12-15 | 安徽省勘查技术院(安徽省地质矿产勘查局能源勘查中心) | Comprehensive geophysical well logging method and system for searching metal ore |
| CN111736225A (en) * | 2020-06-11 | 2020-10-02 | 中化地质矿山总局地质研究院 | Medium-low temperature hydrothermal liquid filling type fluorite ore exploration method and exploration device |
| CN111596373A (en) * | 2020-07-20 | 2020-08-28 | 核工业航测遥感中心 | Method for rapidly searching concealed medium-low temperature hydrothermal type copper polymetallic ore |
| CN112255691A (en) * | 2020-11-09 | 2021-01-22 | 高军 | Method for detecting deep fracture geology by induced polarization composite frequency |
| CN112255691B (en) * | 2020-11-09 | 2024-02-02 | 高军 | Deep fracture geological method for detecting excitation composite frequency |
| CN112799142A (en) * | 2020-12-30 | 2021-05-14 | 核工业北京地质研究院 | Mineral combination prediction method for uranium, molybdenum and lead multi-metal mineralization |
| CN112799142B (en) * | 2020-12-30 | 2021-12-17 | 核工业北京地质研究院 | Mineral combination prediction method for uranium, molybdenum and lead multi-metal mineralization |
| CN113759434A (en) * | 2021-09-07 | 2021-12-07 | 中国有色桂林矿产地质研究院有限公司 | Ore finding method for tracking primary mineralization outcrop based on rock debris micro-point information |
| CN113759434B (en) * | 2021-09-07 | 2023-11-17 | 中国有色桂林矿产地质研究院有限公司 | Ore finding method for tracking primary mineralization outcrop based on rock debris micro-point information |
| CN113946950A (en) * | 2021-10-12 | 2022-01-18 | 青海省第三地质勘查院 | Method for rapidly delineating target area of gold prospecting |
| CN115113297A (en) * | 2022-07-25 | 2022-09-27 | 昆明理工大学 | Method for determining lateral voltage direction and spatial positioning of deep ore body of hydrothermal polymetallic ore bed |
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Application publication date: 20190813 |