Molybdenum polymetallic ore exploration method

Abstract

The invention discloses a molybdenum polymetallic ore exploration method. According to the method, the area is 2.16 km < 2 > at 1: 2000, the hydraulic environment mapping proportion is 1: 5000, the area is 3.40 km < 2 >, the topographic survey proportion is 1: 2000, and the area is 2.16 km < 2 >. S2, drilling footage is executed, a basic sample is obtained, and basic sampling is completed; wherein the footage distance is 657.32 m, and the number of collected basic split samples is 10363; in S2, the drilling position is from the 58 line and the east of the 58 line, and deep drilling (the well depth is 1200 m) needs to be conducted with the rock mass uncovering as the main target; in the step S2, when the molybdenum mineralization grade is relatively low, full-hole sampling is adopted for drilling, and for altered rocks which are subjected to green disc rock formation and do not have other alteration effect superposition, molybdenum mineralization does not exist, and sampling is not carried out; s3, preparing a mineral separation test sample, wherein the number of the mineral separation test sample is one. According to the method, the problems that the control network degree is still sparse, the ore body scale is not completely controlled and 332 or 331 types of resource reserves cannot be explored in the existing polymetallic ore exploration are solved, the exploration effect is improved, the requirements are met, and the method is convenient to use.

Description

Technical Field

[0001] The invention relates to the technical field of metal ore exploration, and in particular to a molybdenum polymetallic ore exploration method. Background Art

[0002] Metal mine exploration is the process of finding and determining the location, scale, quality and mining conditions of these metal mines through various technologies and means. For Dabaoshan Mining in Guangdong Province, the iron ore and copper-sulfur ore resources can only maintain production for 2-3 years and 15 years, respectively. It is a severely crisis mine. Therefore, it is necessary to actively explore the surrounding metal mines to replace the existing mines and solve the crisis mines. However, there are the following defects in the exploration process:

[0003] 1. The No. Ⅲ molybdenum industrial ore body is located on the upper plate of the Fa12 fault. The ore body is extremely thick. The ore bodies of various projects and sections can correspond to each other. The use of a 200×160-meter grid can achieve the purpose of exploring the 322 resource reserves. However, for the No. Ⅰ and No. Ⅱ ore body groups, the ore body shapes are more complex and it is difficult to accurately correspond to each ore body. The use of a 100×80-meter grid to explore the 322 resource reserves still feels sparse.

[0004] 2. Due to the limitation of drilling workload, the ore body has not been sealed yet, and the ore body has a large extension trend to the north and east, and the scale of the ore body has not been fully controlled.

[0005] 3. Due to the difficulty of drilling construction, no drilling holes were arranged on Line 48, so that the reserves of 332 or 331 types of resources cannot be explored on Lines 46-50. Summary of the invention

[0006] The purpose of the present invention is to provide a molybdenum polymetallic ore exploration method to solve the problems raised in the above background technology that the control grid density in the current exploration of polymetallic ores is still relatively sparse, the ore body scale has not been fully controlled, and the 332 or 331 resource reserves cannot be explored.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention is a molybdenum polymetallic ore exploration method, comprising:

[0009] S1. Perform geological mapping and hydraulic and environmental mapping to complete topographic survey; wherein the geological mapping scale is 1:2000 and the area is 2.16km 2 The water conservancy and environmental mapping scale is 1:5000 and the area is 3.40km 2 The topographic survey scale is 1:2000 and the area is 2.16km 2 .

[0010] S2. Perform drilling footage to obtain basic samples to complete basic sampling; wherein, the footage distance is 657.32m, and the basic samples collected are 10363

[0011] S3. A mineral processing test sample, wherein the mineral processing test sample is one.

[0012] 2. A molybdenum polymetallic ore exploration method according to claim 1, characterized in that: the drilling position in S2 is from line 58 and its east, and deep drilling (well depth 1200 meters) needs to expose the rock mass as the main goal.

[0013] Furthermore, the drilling position in S2 from Line 58 and its east and deep drilling (well depth 1,200 meters) need to be aimed at exposing the rock mass as the main goal.

[0014] Furthermore, in the S2, when the molybdenum mineralization grade is relatively low, the drilling adopts full-hole sampling. For the altered rocks that have undergone propylitization but no other alteration effects superimposed, there is no molybdenum mineralization and no sampling is performed.

[0015] The present invention also provides a key point of a molybdenum polymetallic ore exploration method, including:

[0016] S1. Accurately grasp the production rules of mineral deposits to guide the layout of exploration projects;

[0017] S2. Due to the intrusion of granodiorite porphyry, the shape of Fa12 fault tends to be complicated, or it is swallowed up by granodiorite porphyry and disappears. From Line 58 and its east, in the deep drilling (well depth of 1,200 meters), sulfide-containing skarn limestone and other substances appear in the footwall of the No. Ⅲ ore body. The mineralization and alteration are difficult to expose, so the drilling construction here is mainly aimed at exposing the rock mass;

[0018] S3. Mineralization and alteration are distributed in a planar manner with a wide range. The mineralization rate of most boreholes is more than 50%. Since the grade of molybdenum mineralization in the mining area is relatively low, it is difficult to distinguish the ore body from the surrounding rock, so full-hole sampling is necessary. However, since molybdenum mineralization is closely related to quartz sericitization, and later superimposed hydromucovite sericitization and chloritization, basic analysis samples are generally required when such rocks are seen. For altered rocks that have been cyanobacterialized but not superimposed by other alteration effects, there is generally no molybdenum mineralization and no sampling is required;

[0019] S4. Accurately grasp the lithology and engineering geological conditions of the mining area to guide drilling construction. Clay mineralization layers are easily broken into sand and powder. The engineering geological conditions are poor, drilling accidents are very likely to occur, and the core recovery rate is low. By giving advance notice and adopting different drilling methods, accidents in the hole can be avoided and the recovery rate can be guaranteed.

[0020] The present invention has the following beneficial effects:

[0021] 1. Through exploration work, the lithology, structural distribution and magmatic activity of the mining area were identified in detail; the mineralization control factors and mineralization enrichment rules were systematically summarized.

[0022] 2. The distribution, scale, morphology and occurrence of the ore bodies within the scope of work were investigated in detail. A total of 3 major molybdenum ore bodies of porphyry type, 9 minor ore bodies, 33 scattered ore bodies, and 3 tungsten ore bodies were delineated; 2 skarn tungsten ore bodies and 4 molybdenum ore bodies were delineated. According to the geological characteristics of the ore bodies, the exploration types of the No. Ⅲ molybdenum industrial ore body and the No. Ⅰ and No. Ⅱ ore body groups were determined as Class Ⅰ and Class Ⅱ respectively. The 200×160m grid was used as the basic control grid to carry out a more systematic control of the main ore body No. Ⅲ molybdenum industrial ore body. The determined exploration type, grid and work degree are reasonable, and the selected means and methods are correct.

[0023] 3. The ore type, mineral composition, structural structure, ore quality, and degree of ore oxidation were identified in detail. Through the identification of the material composition of the ore and the study of ore process mineralogy, it was determined that the material composition of the ore is relatively complex. The primary sulfide ore is a selectable ore and the flotation process is used. However, the selectability of the mixed ore and tungsten ore needs to be further identified.

[0024] 4. This time, resource reserves estimation was carried out for 54 tungsten-molybdenum ore bodies within the work scope.

[0025] (1) Molybdenum ore (333+332+331+2S22) was discovered: 451,544.4 thousand tons of ore and 300,599 tons of metal, including:

[0026] ① Porphyry mixed molybdenum ore (333+332+2S22): ore volume 56316.4 thousand tons, metal volume 27137 tons;

[0027] ② Primary molybdenum ore (333+332+331+2S22): 395,227.9 thousand tons of ore, 273,463 tons of metal; among them, industrial molybdenum ore (333+332+331): 197,098.9 thousand tons of ore, 197,276 tons of metal, industrial molybdenum ore (332+331): 95,945.8 thousand tons of ore, 104,839 tons of metal. Industrial molybdenum ore (333+332+331) of No. Ⅲ ore body: 161,282.6 thousand tons of ore, 172,703 tons of metal.

[0028] (2) Tungsten industrial ore (333) was discovered: 2,567.1 thousand tons of ore and 4,613 tons of metal.

[0029] Among the resource reserves estimated this time, the 331+332 resource reserves account for about 43% of the total reserves, which meets the requirements of the exploration stage.

[0030] 5. A rough technical and economic evaluation was conducted on the mineral deposit, and the potential value of the mineral deposit reached 40.8 billion yuan. If calculated based on a daily ore processing capacity of 8,000 tons, the service life can be extended to more than 50 years.

[0031] 6. The main aquifers, aquicludes and other hydrogeological conditions in the mining area have been identified in detail. The hydrogeological conditions of the ore deposit are simple; the engineering geological conditions are medium; and the environmental geological complexity is medium to complex.

[0032] 7. All exploration work, including mining, processing, chemical and exploration engineering quality, meets the requirements of the regulations, and the data is accurate and reliable.

[0033] 8. The degree of geological exploration in the deep and surrounding areas of the Dabaoshan polymetallic deposit is relatively low. According to the mineralization laws and conditions of the deposit, there is still considerable prospecting potential in this area. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0035] Figure 1 It is a cross-sectional schematic diagram of the comparison between the 54-line CSAMT two-dimensional inversion resistivity interpretation and drilling results of the present invention;

[0036] Figure 2 This is the 60-line cross-sectional view of the molybdenum polymetallic mine in the Dabaoshan mining area of ​​the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] See also Figure 1-2 As shown, the present invention is a molybdenum polymetallic ore exploration method, comprising:

[0040] S1. Perform geological mapping and hydraulic and environmental mapping to complete topographic survey; wherein the geological mapping scale is 1:2000 and the area is 2.16km 2The water conservancy and environmental mapping scale is 1:5000 and the area is 3.40km 2 The topographic survey scale is 1:2000 and the area is 2.16km 2 .

[0041] S2. Execute drilling footage to obtain basic subsamples to complete basic sampling; wherein the footage distance is 657.32 m, and the number of basic subsamples collected is 10363;

[0042] The drilling position in S2 is from Line 58 and its east, and deep drilling (well depth 1200 meters) needs to expose the rock mass as the main goal;

[0043] In S2, when the molybdenum mineralization grade is relatively low, the drilling hole adopts full-hole sampling. For the altered rocks that have been cyanoliticized but not superimposed by other alteration effects, there is no molybdenum mineralization and no sampling is done;

[0044] S3, mineral processing test sample, the mineral processing test sample is 1;

[0045] Based on the above exploration methods, the objectives are:

[0046] 1. Detailed investigation of the geological characteristics of the mining area; focus on the relationship between molybdenum mineralization and granodiorite porphyry and hypodacite porphyry;

[0047] 2. Detailed investigation of the geological characteristics of the porphyry molybdenum deposit, the spatial distribution of oxidized ore, mixed ore and primary ore, and estimation of resource reserves (331+332+333);

[0048] 3. Basically identify the useful and harmful components associated with the molybdenum ore body.

[0049] 4. Conduct laboratory process tests on ore, optimize ore dressing process and obtain relevant economic and technical indicators of ore dressing;

[0050] 5. Detailed investigation of the technical conditions for mining the ore deposit, preliminarily predict the future mine water inflow and evaluate its impact on the mining of the ore deposit.

[0051] 6. Carry out comprehensive research work. The main purpose is to systematically summarize the geological characteristics and mineralization laws of the ore deposits, with an emphasis on analyzing the relationship between rock intrusion and interpenetration, and the spatial and temporal relationship between the alteration zoning of porphyry bodies and molybdenum and tungsten mineralization.

[0052] It also includes key points of exploration methods for molybdenum polymetallic deposits, including:

[0053] S1. Accurately grasp the production rules of mineral deposits to guide the layout of exploration projects;

[0054] S2. Due to the intrusion of granodiorite porphyry, the shape of Fa12 fault tends to be complicated, or it is swallowed up by granodiorite porphyry and disappears. From Line 58 and its east, in the deep drilling (well depth of 1,200 meters), sulfide-containing skarn limestone and other substances appear in the footwall of the No. Ⅲ ore body. The mineralization and alteration are difficult to expose, so the drilling construction here is mainly aimed at exposing the rock mass;

[0055] S3. Mineralization and alteration are distributed in a planar manner with a wide range. The mineralization rate of most boreholes is more than 50%. Since the grade of molybdenum mineralization in the mining area is relatively low, it is difficult to distinguish the ore body from the surrounding rock, so full-hole sampling is necessary. However, since molybdenum mineralization is closely related to quartz sericitization, and later superimposed hydromucovite sericitization and chloritization, basic analysis samples are generally required when such rocks are seen. For altered rocks that have been cyanobacterialized but not superimposed by other alteration effects, there is generally no molybdenum mineralization and no sampling is required;

[0056] S4. Accurately grasp the lithology and engineering geological conditions of the mining area to guide drilling construction. Clay mineralization layers are easily broken into sand and powder. The engineering geological conditions are poor, drilling accidents are very likely to occur, and the core recovery rate is low. By giving advance notice and adopting different drilling methods, accidents in the hole can be avoided and the recovery rate can be guaranteed;

[0057] Based on the above exploration methods and key points, the results achieved are:

[0058] 1. Through exploration work, the lithology, structural distribution and magmatic activity of the mining area were identified in detail; the mineralization control factors and mineralization enrichment rules were systematically summarized.

[0059] 2. The distribution, scale, morphology and occurrence of the ore bodies within the scope of work were investigated in detail. A total of 3 major molybdenum ore bodies of porphyry type, 9 minor ore bodies, 33 scattered ore bodies, and 3 tungsten ore bodies were delineated; 2 skarn tungsten ore bodies and 4 molybdenum ore bodies were delineated. According to the geological characteristics of the ore bodies, the exploration types of the No. Ⅲ molybdenum industrial ore body and the No. Ⅰ and No. Ⅱ ore body groups were determined as Class Ⅰ and Class Ⅱ respectively. The 200×160m grid was used as the basic control grid to carry out a more systematic control of the main ore body No. Ⅲ molybdenum industrial ore body. The determined exploration type, grid and work degree are reasonable, and the selected means and methods are correct.

[0060] 3. The ore type, mineral composition, structural structure, ore quality, and degree of ore oxidation were identified in detail. Through the identification of the material composition of the ore and the study of ore process mineralogy, it was determined that the material composition of the ore is relatively complex. The primary sulfide ore is a selectable ore and the flotation process is used. However, the selectability of the mixed ore and tungsten ore needs to be further identified.

[0061] 4. This time, resource reserves estimation was carried out for 54 tungsten-molybdenum ore bodies within the work scope.

[0062] (1) Molybdenum ore (333+332+331+2S22) was discovered: 451,544.4 thousand tons of ore and 300,599 tons of metal, including:

[0063] ① Porphyry mixed molybdenum ore (333+332+2S22): ore volume 56316.4 thousand tons, metal volume 27137 tons;

[0064] ② Primary molybdenum ore (333+332+331+2S22): 395,227.9 thousand tons of ore, 273,463 tons of metal; among them, industrial molybdenum ore (333+332+331): 197,098.9 thousand tons of ore, 197,276 tons of metal, industrial molybdenum ore (332+331): 95,945.8 thousand tons of ore, 104,839 tons of metal. Industrial molybdenum ore (333+332+331) of No. Ⅲ ore body: 161,282.6 thousand tons of ore, 172,703 tons of metal.

[0065] (2) Tungsten industrial ore (333) was discovered: 2,567.1 thousand tons of ore and 4,613 tons of metal.

[0066] Among the resource reserves estimated this time, the 331+332 resource reserves account for about 43% of the total reserves, which meets the requirements of the exploration stage.

[0067] 5. A rough technical and economic evaluation was conducted on the mineral deposit, and the potential value of the mineral deposit reached 40.8 billion yuan. If calculated based on a daily ore processing capacity of 8,000 tons, the service life can be extended to more than 50 years.

[0068] 6. The main aquifers, aquicludes and other hydrogeological conditions in the mining area have been identified in detail. The hydrogeological conditions of the ore deposit are simple; the engineering geological conditions are medium; and the environmental geological complexity is medium to complex.

[0069] 7. The quality of various exploration works, including mining, processing, chemical engineering and exploration projects, meets the requirements of the specifications and the data are accurate and reliable.

[0070] 8. The geological exploration level in the deep and surrounding areas of the Dabaoshan polymetallic deposit is relatively low. According to the mineralization laws and conditions of the deposit, there is still considerable prospecting potential in this area, which is specifically manifested as follows:

[0071] 1. According to the geophysical CSAMT results, the low-resistance anomaly extends deep in the northeast direction of the exploration area. Deep drilling shows that the molybdenum ore body is not closed to the north and east. Therefore, there is still a geological prerequisite for expanding prospecting prospects in the north and east of the working area.

[0072] 2. Skarn, skarnized limestone and skarnized sandstone were found in the deep parts of boreholes ZK6204 and ZK6005 on the northeast side. A large amount of pyrite and pyrrhotite were found in the skarn, and copper mineralization was associated with it. Therefore, the conditions for finding skarn-type copper polymetallic deposits related to carbonate strata under the rock mass are available in the deep part of the mining area.

[0073] 3. In the southwest of the Fa12 fault, many granodiorite porphyry veins are exposed. The rock chemical composition and lithofacies characteristics are consistent with those of the Dabaoshan granodiorite porphyry. Molybdenum and tungsten mineralization (bodies) are found in the surface and deep Jurassic sandstone shale strata, and the alteration zones around the Dabaoshan granodiorite porphyry are missing in the southwest of the Fa12 fault. Therefore, there is a prerequisite for finding porphyry and skarn-type molybdenum-tungsten polymetallic deposits in the deep rock bodies and Devonian strata on the southwest side of the Fa12 fault.

[0074] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A molybdenum polymetallic ore exploration method, characterized in that: include: S1. Perform geological mapping and hydraulic and environmental mapping to complete topographic survey; wherein the geological mapping scale is 1:2000 and the area is 2.16km 2 The water conservancy and environmental mapping scale is 1:5000 and the area is 3.40km 2 The topographic survey scale is 1:2000 and the area is 2.16km 2 . S2. Perform drilling footage to obtain basic samples to complete basic sampling; wherein, the footage distance is 657.32m, and the basic samples collected are 10363 S3. A mineral processing test sample, wherein the mineral processing test sample is one.

2. A molybdenum polymetallic ore exploration method according to claim 1, characterized in that: The drilling position in S2 is from Line 58 and its east, and deep drilling, with the main goal of exposing the rock mass.

3. A molybdenum polymetallic ore exploration method according to claim 1, characterized in that: In the S2, when the molybdenum mineralization grade is relatively low, the drilling adopts full-hole sampling. For the altered rocks that have been cyanoliticized but not superimposed by other alteration effects, there is no molybdenum mineralization and no sampling is done.

4. The key point of the molybdenum polymetallic ore exploration method according to any one of claims 1 to 3 is characterized in that: include: S1. Accurately grasp the production rules of mineral deposits to guide the layout of exploration projects; S2. Due to the intrusion of granodiorite porphyry, the shape of Fa12 fault tends to be complicated, or it is swallowed up by granodiorite porphyry and disappears. From Line 58 and its east, in the deep drilling (well depth of 1,200 meters), sulfide-containing skarn limestone and other substances appear in the footwall of the No. Ⅲ ore body. The mineralization and alteration are difficult to expose, so the drilling construction here is mainly aimed at exposing the rock mass; S3. Mineralization and alteration are distributed in a planar manner with a wide range. The mineralization rate of most boreholes is more than 50%. Since the grade of molybdenum mineralization in the mining area is relatively low, it is difficult to distinguish the ore body from the surrounding rock, so full-hole sampling is necessary. However, since molybdenum mineralization is closely related to quartz sericitization, and later superimposed hydromucovite sericitization and chloritization, basic analysis samples are generally required when such rocks are seen. For altered rocks that have been cyanobacterialized but not superimposed by other alteration effects, there is generally no molybdenum mineralization and no sampling is required; S4. Accurately grasp the lithology and engineering geological conditions of the mining area to guide drilling construction. Clay mineralization layers are easily broken into sand and powder. The engineering geological conditions are poor, drilling accidents are very likely to occur, and the core recovery rate is low. By giving advance notice and adopting different drilling methods, accidents in the hole can be avoided and the recovery rate can be guaranteed.

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