CN112799142B - Mineral combination prediction method for uranium, molybdenum and lead multi-metal mineralization - Google Patents
Mineral combination prediction method for uranium, molybdenum and lead multi-metal mineralization Download PDFInfo
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- 229910052500 inorganic mineral Inorganic materials 0.000 title claims abstract description 100
- 239000011707 mineral Substances 0.000 title claims abstract description 100
- 230000033558 biomineral tissue development Effects 0.000 title claims abstract description 37
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 30
- 239000011733 molybdenum Substances 0.000 title claims abstract description 30
- 229910052750 molybdenum Inorganic materials 0.000 title claims abstract description 30
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910052751 metal Inorganic materials 0.000 title description 3
- 239000002184 metal Substances 0.000 title description 3
- 239000011435 rock Substances 0.000 claims abstract description 29
- -1 uranium molybdenum lead Chemical compound 0.000 claims abstract description 17
- 239000000523 sample Substances 0.000 claims description 23
- 230000003647 oxidation Effects 0.000 claims description 16
- 238000007254 oxidation reaction Methods 0.000 claims description 16
- 230000004075 alteration Effects 0.000 claims description 10
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 5
- UOAGBWVLDBERNF-UHFFFAOYSA-N [Ca].[Mo] Chemical compound [Ca].[Mo] UOAGBWVLDBERNF-UHFFFAOYSA-N 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 3
- 238000011161 development Methods 0.000 claims description 3
- 230000018109 developmental process Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 229910052748 manganese Inorganic materials 0.000 claims description 3
- 239000011572 manganese Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 2
- 230000001089 mineralizing effect Effects 0.000 claims description 2
- 230000002285 radioactive effect Effects 0.000 claims description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- UGDVNBGOMUHGKW-UHFFFAOYSA-N calcium uranium Chemical compound [Ca].[U] UGDVNBGOMUHGKW-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004334 fluoridation Methods 0.000 description 1
- 229910052949 galena Inorganic materials 0.000 description 1
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 1
- 229910052683 pyrite Inorganic materials 0.000 description 1
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 1
- 239000011028 pyrite Substances 0.000 description 1
- WGPCGCOKHWGKJJ-UHFFFAOYSA-N sulfanylidenezinc Chemical compound [Zn]=S WGPCGCOKHWGKJJ-UHFFFAOYSA-N 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 229910052984 zinc sulfide Inorganic materials 0.000 description 1
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- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V5/00—Prospecting or detecting by the use of ionising radiation, e.g. of natural or induced radioactivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
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Abstract
The invention belongs to the technical field of polymetallic ore geological exploration, and particularly relates to a mineral combination prediction method for uranium, molybdenum and lead polymetallic mineralization, which comprises the following steps: step 1: identifying and selecting the surface mineralization information; step 2: collecting a sample of the altered rock; and step 3: identifying the type of the uranium, molybdenum and lead minerals; and 4, step 4: identifying key mineral combinations; and 5: and predicting the deep concealed uranium molybdenum lead ore body. The mineral combination method for indicating deep concealed uranium molybdenum lead mineralization, which is designed by the invention, can be used for quickly predicting deep mineralization, and is simple in implementation process, high in speed and low in cost.
Description
Technical Field
The invention belongs to the technical field of polymetallic ore geological exploration, and particularly relates to a mineral combination prediction method for uranium, molybdenum and lead polymetallic mineralization.
Background
Uranium molybdenum lead ore deposits are a common multi-metal combined ore deposit type, the output of which is often related to the action of mesomorphic volcanoes or volcanic rocks, such as the ore deposits of the great officer factory in the field of mine formation of red hill, which is a source of staphylic mountain in China, the output stratum is mesomorphic early chalky family group rhyolite, and the cause type is a typical volcanic hydrothermal ore deposit. The mineral deposit of the type mainly develops in a concealed mode, the burial depth of a mineral body is generally 200 meters above the ground surface, and the ground surface has obvious mineralization clues and weak mineralization information.
For deep prediction of this type of ore deposit, the prior art mostly uses a general exploration mode and flow of volcanic type uranium ore as basic ideas, and carries out a series of comprehensive exploration such as 'earth-object-chemical-remote-engineering' and the like according to surface mineralization information. Therefore, under the background, a strong-pertinence, simple and rapid deep mineralization prediction method needs to be designed, a more reliable basis is provided for the deep prediction engineering of the system, and the exploration cost is saved.
Disclosure of Invention
The invention aims to provide a mineral combination prediction method for uranium, molybdenum and lead polymetallic mineralization, aiming at overcoming the defects of the prior art, and solving the technical defects of long exploration period and high investment cost in the prior exploration technology.
The technical scheme of the invention is as follows:
a mineral combination prediction method for uranium, molybdenum and lead polymetallic mineralization comprises the following steps:
step 1: identifying and selecting the surface mineralization information;
step 2: collecting a sample of the altered rock;
and step 3: identifying the type of the uranium, molybdenum and lead minerals;
and 4, step 4: identifying key mineral combinations;
and 5: and predicting the deep concealed uranium molybdenum lead ore body.
The identification and selection of the surface mineralization information in the step 1 comprises the following steps: in a uranium molybdenum lead polymetallic prospect area, investigation and research on mineralizing geology, structure, alteration and mineralization abnormal characteristics are carried out, and beneficial positions of uranium molybdenum lead polymetallic prospecting are defined.
In the step 2, the collection of the altered rock sample comprises the following steps: selecting a rock sample with high mineralized element content, if the surface mineralization information is very weak and cannot be directly observed or measured in the field, collecting the rock sample at the hydrothermal alteration center, and forming profile type collection at certain intervals along a fixed direction; if the weathering effect of the earth surface is strong, collecting a deep and fresh rock sample; the number of samples is determined according to the mineralization scale of the earth surface, and the number of the samples is not less than 5;
if the earth surface is strongly weathered, collecting samples in a position which is 1 to 2m deep from the earth surface in the exploration groove of the collecting device; a handheld gamma detector is used for collecting rocks with the maximum radioactive intensity, small grit size and rich alteration types.
The uranium molybdenum lead mineral type identification in the step 3 comprises the following steps: mineral identification and electronic probe test identification under a microscope specifically comprise the following steps:
step 3.1: manufacturing the rock sample collected in the step 2 into an optical slice; cutting at least 2 optical sheets from different orientations per rock sample;
step 3.2, performing mineralogy identification on the polished light slice ground in the step 2.1 under a microscope, focusing the mineral types of uranium-bearing minerals, molybdenum-bearing minerals and lead-bearing minerals, and recording each mineral type;
and 3.3, testing the element types and the element contents of suspected uranium, molybdenum and lead minerals with unobvious characteristics under the microscope, roughly estimating the mineral types according to the element contents, calculating corresponding mineral molecular formulas according to an anion method based on the chemical general formulas of the estimated minerals, and accurately identifying the mineral types.
The identification of the key mineral combination in the step 4 comprises the following steps: identifying the ore-forming element mineral combination characteristics by combining uranium-forming minerals, molybdenum-forming minerals and lead-forming minerals obtained in the step 3 according to the oxidation zone minerals and non-oxidation zone minerals; in the uranium molybdenum lead ore deposit, the combination characteristics of the key oxidation zone minerals are as follows: the combination of the silico-calcium uranium ore, the molybdenum calcium ore and the plumbite ore.
And 5, predicting the concealed uranium, molybdenum and lead ore body in the deep part, judging whether the earth surface abnormity is an ore deposit oxidation zone or not according to the mineral combination characteristics identified in the step 4, and if the earth surface abnormity is an oxidation zone mineral combination, judging that the concealed ore body indicates deep development and is used as an important basis and indication for deep exploration.
The invention has the following beneficial effects:
(1) the method for predicting the mineral combination of uranium, molybdenum and lead polymetallic mineralization can be used for rapidly predicting deep mineralization, and is simple in implementation process, high in speed and low in cost; (2) the mine combination prediction method for uranium, molybdenum and lead polymetallic mineralization, which is designed by the invention, can provide a basis for deep exploration engineering and reduce exploration risks; (3) the prediction method of the mineral combination for the polymetallic mineralization of the uranium, molybdenum and lead has a remarkable application effect on evaluation of the deep mineralization potential of the hydrothermal uranium, molybdenum and lead ore developing in the volcanic rock area, and has an important significance on guiding the exploration of deep uranium, molybdenum and lead.
Drawings
Fig. 1 is a flow chart of a mineral combination prediction method for uranium, molybdenum and lead polymetallic mineralization, which is designed by the invention.
Detailed Description
The technical solutions of the present invention will be described in detail below in order to clearly understand the technical features, objects, and advantages of the present invention, but the present invention is not limited thereto.
The present invention will be described in further detail with reference to examples.
As shown in fig. 1, the method for predicting the combination of minerals in uranium, molybdenum and lead polymetallic mineralization provided by the invention specifically comprises the following steps:
step 1: and identifying and selecting the area according to the surface mineralization information.
In an optimal uranium molybdenum lead polymetallic prospect area, characteristic investigation and research such as mineralization geology, structure, alteration and mineralization abnormity are carried out, and beneficial positions of uranium molybdenum lead polymetallic prospecting are defined.
In the present example, in the secondary fracture in which the volcanic rock zone NW is fractured into the regional ore control, along the structural breccia zone, silicidation, fluoridation with violet black and clayization are strongly developed, and in the central portion of the alteration, mineralization with a small range and a low content of uranium, molybdenum and lead is observed. The secondary structure is defined as an advantageous portion for finding a mine with the abnormal point as a center.
Step 2: and (4) collecting a weakly mineralized rock sample.
And (4) collecting a sample of the surface mineralized rock, preferably selecting the rock with higher content of mineralized elements. If the mineralization information of the earth surface is very weak and cannot be directly observed or measured in the field, the rocks at the center of hydrothermal alteration should be collected and profile-type collection is formed at certain intervals along a fixed direction. If the weathering of the earth surface is strong, fresh rock samples of a certain depth should be collected. The number of samples is determined according to the mineralization scale of the earth surface, and is generally not less than 5.
In this example, the sample was collected from the probe trench at a depth of about 2m from the earth's surface due to intense weathering of the earth's surface. Using a hand-held gamma detector, rocks with the greatest radioactivity intensity, smaller grit size, and rich types of alterations are preferably collected. The number of samples collected was 5.
And step 3: and identifying the type of the uranium molybdenum lead mineral.
Step 3.1: and (3) manufacturing the rock sample collected in the step (2) into an optical sheet. It is required that each rock sample should cut at least 2 optical sheets from different orientations.
Step 3.2: and (3) performing mineralogy identification on the polished light slice in the step 2.1 under a microscope, wherein the focused mineral types are uranium-bearing minerals, molybdenum-bearing minerals and lead-bearing minerals, and recording each mineral type.
Step 3.3: the method comprises the steps of carrying out element type and content tests on suspected uranium, molybdenum and lead minerals with unobvious features under a microscope, roughly inferring the mineral type according to the element content, calculating the corresponding mineral molecular formula according to an anion method based on the inferred chemical general formula of the minerals, and accurately identifying the mineral type.
And 4, step 4: and identifying key mineral combinations.
And (3) identifying the mineral combination characteristics of the mineral forming elements by combining uranium-forming minerals, molybdenum-forming minerals and lead-forming minerals obtained in the step (3) according to the minerals (secondary minerals) in the oxidation zone and the minerals (primary minerals) in the non-oxidation zone.
In this embodiment, uranium mainly exists in silico-calcium-uranium ores and calcium-uranium ores, molybdenum mainly exists in the form of molybdenum-calcium ores, lead mainly exists in the form of lead-manganese ores, and the uranium-providing minerals, the molybdenum-providing minerals and the lead-providing minerals are combined into a combination of silico-calcium-uranium ores, calcium-molybdenum ores and lead-manganese ores, and are a typical combination type of oxidation zone minerals.
And 5: and predicting the deep concealed uranium molybdenum lead ore body.
And (4) judging whether the surface anomaly is an ore deposit oxidation zone or not according to the mineral combination characteristics identified in the step (4). If the mineral combination is an oxidation zone mineral (secondary mineral), the mineral combination is judged to indicate a deep development concealed ore body; in the case of a combination of non-oxidized zone minerals (primary minerals), it is judged as an indication that the ore body is only developing near the surface.
In this example, the uranium, molybdenum, and lead minerals are a combination of oxidation zone minerals (secondary minerals), and it is assumed that a cryptomelane body develops in a deep portion. Combining other favorable ore formation information, performing subsequent construction for 3 drilling holes for verification, finding out multiple layers of ore bodies reaching industrial grade at the depth of 48-294 meters, realizing ore finding breakthrough, and developing a large amount of primary mineral types such as molybdenum colloid ores, galena ores, zinc blende ores, pyrite ores and the like in a mineralization section.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (3)
1. A mineral combination prediction method for uranium, molybdenum and lead polymetallic mineralization is characterized by comprising the following steps:
step 1: identifying and selecting the surface mineralization information: carrying out investigation and research on mineralizing geology, structure, alteration and mineralization abnormal characteristics in a uranium-molybdenum-lead polymetallic prospect area, and delineating beneficial positions of uranium-molybdenum-lead polymetallic prospecting;
step 2: collecting a sample of the altered rock, and collecting a sample of the surface mineralized rock;
and step 3: the uranium molybdenum lead mineral type identification comprises the following steps: mineral identification and electronic probe test identification under a microscope specifically comprise the following steps:
step 3.1: manufacturing the rock sample collected in the step 2 into an optical slice; cutting at least 2 optical sheets from different orientations per rock sample;
step 3.2, performing mineralogy identification on the polished light slice ground in the step 2.1 under a microscope, focusing the mineral types of uranium-bearing minerals, molybdenum-bearing minerals and lead-bearing minerals, and recording each mineral type;
3.3, testing the element types and the element contents of suspected uranium, molybdenum and lead minerals with unobvious characteristics under the microscope, roughly estimating the mineral types according to the element contents, calculating the molecular formulas of the corresponding minerals according to an anion method based on the chemical general formula of the estimated minerals, and accurately identifying the mineral types;
and 4, step 4: and (3) identifying key mineral combinations: identifying the ore-forming element mineral combination characteristics by combining uranium-forming minerals, molybdenum-forming minerals and lead-forming minerals obtained in the step 3 according to the oxidation zone minerals and non-oxidation zone minerals; in the uranium molybdenum lead ore deposit, the combination characteristics of the key oxidation zone minerals are as follows: the composition comprises silico-calcium uranium ore, molybdenum calcium ore and plumbum manganese ore;
and 5: and predicting the deep concealed uranium molybdenum lead ore body.
2. The method for predicting the combination of minerals for polymetallization of uranium, molybdenum and lead according to claim 1, wherein the method comprises the following steps: in the step 2, the collection of the altered rock sample comprises the following steps: selecting a rock sample with high mineralized element content, if the surface mineralization information is very weak and cannot be directly observed or measured in the field, collecting the rock sample at the hydrothermal alteration center, and forming profile type collection at certain intervals along a fixed direction; if the weathering effect of the earth surface is strong, collecting a deep and fresh rock sample; the number of samples is determined according to the mineralization scale of the earth surface, and the number of the samples is not less than 5;
if the earth surface is strongly weathered, collecting samples in a position which is 1 to 2m deep from the earth surface in the exploration groove of the collecting device; a handheld gamma detector is used for collecting rocks with the maximum radioactive intensity, small grit size and rich alteration types.
3. The method for predicting the combination of minerals for polymetallization of uranium, molybdenum and lead according to claim 1, wherein the method comprises the following steps: and 5, predicting the concealed uranium, molybdenum and lead ore body in the deep part, judging whether the earth surface abnormity is an ore deposit oxidation zone or not according to the mineral combination characteristics identified in the step 4, and if the earth surface abnormity is an oxidation zone mineral combination, judging that the concealed ore body indicates deep development and is used as an important basis and indication for deep exploration.
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