阅读说明：本技术 一种黑色岩系钒钼矿找矿方法 (Ore seeking method for black rock series vanadium-molybdenum ore ) 是由 田滔 张勤山 许光 杨启安 苗国文 何利 张锋 李生虎 赵立志 于 2020-06-09 设计创作，主要内容包括：本发明公开了一种黑色岩系钒钼矿找矿方法,包括以下步骤：在拟开展的研究区通过1∶5万水系沉积物测量及大比例尺地质调查圈定出多元素水系沉积物综合异常图并初步识别出黑色岩系的空间展布形态；进行1∶1万土壤地球化学测量,圈定出与黑色岩系有关的土壤地球化学综合异常图；在异常的浓集中心部署1∶2000岩石地球化学剖面进行控制追索,初步优选划分出含矿破碎蚀变带；针对含矿破碎蚀变带部署探槽进行揭露控制,圈出矿(化)体；根据矿(化)体特征,优选品位高、厚度大的钒钼矿体部署钻孔,进行深部验证,并具体圈定出矿体,本发明上述方法具有良好的找矿效果。(The invention discloses an ore finding method for black rock series vanadium-molybdenum ore, which comprises the following steps: determining a multi-element water system sediment comprehensive abnormal graph and preliminarily identifying the space distribution form of a black rock system in a to-be-developed research area through 1: 5 ten thousand water system sediment measurement and large scale geological survey; carrying out 1:1 ten thousand soil geochemical measurements, and delineating a soil geochemical comprehensive abnormal graph related to black rock series; deploying a 1:2000 rock geochemical profile in an abnormal concentration center for control pursuit, and primarily preferably marking off an ore-containing crushing alteration zone; a exploring groove is deployed for exposure control aiming at the ore-containing broken altered zone, and an ore (chemical) body is trapped out; according to the characteristics of the ore (chemical) body, the vanadium-molybdenum ore body with high grade and large thickness is preferably selected to be deployed and drilled, deep verification is carried out, and the ore body is specifically defined.)

1. The method for finding the black rock series vanadium molybdenum ore is characterized by comprising the following steps of:

(1) measuring 1: 5 ten thousand water system sediments in a research area to be developed, and delineating a comprehensive abnormal area; simultaneously preliminarily identifying the space distribution form of the black rock system through large-scale geological survey;

(2) 1:1 ten thousand soil geochemical measurements are carried out aiming at the black rock system distribution area and combined with the comprehensive abnormal area circled by 1: 5 ten thousand water system sediment measurements, and the abnormal target area is further reduced;

(3) carrying out 1:2000 rock geochemical profile measurement on the delineated 1:1 ten thousand soil geochemical abnormal key section and the found alteration broken zone, and selecting a black rock series ore-containing section;

(4) selecting a mineralization alteration zone with remarkable mineralization and abnormal mineralization to deploy a detection groove for disclosure control, and delineating a mineralized body or an ore body;

(5) the change conditions of deep grade, thickness, scale and production state of the ore body are known by drilling, and the ore body or ore deposit is found.

2. The method for finding vanadium-molybdenum ore in black rock system according to claim 1, wherein in the step (1), in the measurement of 1: 5 water system sediments, a comprehensive abnormal map of water system sediments is drawn according to test data, an ore-finding target area is preliminarily defined, and the target area is classified.

3. The method for finding vanadium-molybdenum ore in black rock series according to claim 1, wherein the large scale geological survey in step (1) is a 1:1 ten thousand geological survey in an important section, a traversing method is taken as a main method, a proper pursuit route is taken as an auxiliary method, the basic network density is 200 x (50-100) m, the shape, the production state, the scale and mineralization clues of the black rock series geological body are found out, a black rock series distribution area is preliminarily screened out, and a black rock series distribution rule graph is accurately compiled.

4. The method for prospecting vanadium-molybdenum ore in black rock system according to claim 1, wherein in step (2), the 1:1 million soil geochemical measurements are distributed in a black rock system distribution area and a 1: 5 million water system sediment abnormal range, vertical construction lines, mineralization zones and alteration zones are distributed, pass through the center of a concentration area, are laid according to a 100 x 40m regular network, further evaluate the mineralization potential of unit elements, and reduce the target area for prospecting.

5. The method for prospecting vanadium-molybdenum ore in black rock series according to claim 1, characterized in that in step (3), the 1:2000 rock geochemical profile is arranged to be perpendicular to the black rock series geologic body trend, the sampling point distance is 5m, the mineralization enrichment zone is encrypted to be less than 2m, the characteristics of main fragmentation alteration zone, special geologic body mineralization and the like are recorded in detail, and the mineralization alteration zone is primarily and preferably divided.

6. The method for prospecting vanadium-molybdenum ore in black rock series according to claim 1, characterized in that in step (4), the sounding grooves are arranged perpendicular to the trend of the mineralization alteration zone, the sampling is carried out by using a grooving method, the specification of the sampling grooves is 10 x 3cm, the rock sample is sampled at a distance of 2-5m and the whole groove control is carried out, and the ore body is revealed, tracked and controlled through the grooving work, so as to preliminarily find out the shape, the output shape and the scale of the ore body and define the ore body on the earth surface.

7. The method for finding the vanadium-molybdenum ore in the ferrous rock system according to claim 1, wherein in the step (5), the drilling is combined with the characteristics of ore bodies or mineralized bodies in the earth surface and a stock prospecting tank, vanadium-molybdenum ore bodies with high grade and large scale are selected to be deployed in the drill hole, the specific drill hole is positioned in an earth surface mineralization enrichment section, the change conditions of deep grade, thickness, scale and production shape of the vanadium-molybdenum ore bodies are known, and the deep ore bodies or ore deposits are found.

Technical Field

The invention relates to the technical field of mineral products, in particular to a method for finding black rock series vanadium-molybdenum ore.

Background

The black rock system is a general term for dark gray black silicalite, carbonate rock, argillite and corresponding metamorphic rocks containing more organic carbon and sulfide, is an important carrier of PGE, Au, Ag, Ni, Mo, V and the like, and is called a multi-element metal enrichment layer. The research of black rock series is known as one of the hot research fields of the current academia, and has important theoretical significance and economic significance.

However, compared with other rock polymetallic ore deposits, the black rock-based ore deposits mainly show that the mineral mineralization and the alteration are not obvious, and the mineralization and the metal minerals are difficult to identify through naked eyes and even under a mirror.

Therefore, how to provide an ore searching method for black rock series vanadium molybdenum ore to quickly evaluate the black rock series is a problem which needs to be solved by the technical personnel in the field.

Disclosure of Invention

In view of the above, the invention provides a method for rapidly evaluating black rock series ore deposits.

In order to achieve the purpose, the invention adopts the following technical scheme:

a method for finding black rock series vanadium molybdenum ore comprises the following steps:

(1) measuring 1: 5 ten thousand water system sediments in a research area to be developed, and delineating an abnormal area; simultaneously preliminarily identifying the space distribution form of the black rock system through large-scale geological survey;

(2) carrying out geochemical measurement of 1:1 ten thousand of soil in a comprehensive abnormal area which is circled by combining the measurement of 1: 5 ten thousand of water system sediments and aiming at a black rock system distribution area, and further reducing an abnormal target area;

the 1:1 ten thousand soil geochemical measurement is that geochemical anomaly is determined by finding out the geochemical distribution characteristics of elements in soil, geological mine finding work is carried out, a residual slope layer is used as a sampling medium, the element migration path is short, the anomaly display intensity is high, and the direct indication effect on mine finding is achieved.

(3) Carrying out 1:2000 rock geochemical profile measurement on the delineated 1:1 ten thousand soil geochemical abnormal key section and the found alteration broken zone, and preferably selecting a black rock series ore-containing section;

(4) preferably, a mineralization alteration zone with remarkable mineralization and abnormality is deployed in a detection groove for disclosure control, and a mineralized body or an ore body is delineated;

(5) the change conditions of deep grade, thickness, scale and production state of the ore body are known by drilling, and the ore body or ore deposit is found.

Preferably, in the method for finding the vanadium-molybdenum ore in the black rock system, in the step (1), 1: 5 million water system sediment measurement is carried out in a research area to be developed, the distribution of sample points strives to control a catchment area to the maximum extent, and the sampling density is controlled to be 4-8 points/km²The content of the compound is less than the content of the compound; selecting various particle sizes on the active flow line, which are beneficial to the water system sediment and are easy to collect, of the sampling part according to the positions of sampling points, avoiding a wind-formed sand and organic matter distribution area, avoiding sampling in a flood plain or a river edge step, manufacturing an element combination abnormal graph for test data by using Geochem Studio and Mapgis software, performing in-class evaluation on the test data by using the same main elements, and then performing abnormal classification according to element abnormal characteristics, geological conditions and the mining significance; and (4) preliminarily defining and finding the target area of the ore by combining the geological features of the region and the geological results of the prior physical exploration and heavy sand abnormity, and classifying the target area.

Preferably, in the method for finding the vanadium-molybdenum ore in the black rock series, in the step (1), a large-scale geological survey means is utilized to carry out 1:1 ten thousand geological sketch survey on a key section, a traversing method is taken as a main method, a proper pursuit route is taken as an auxiliary method, the basic mesh degree is 200 multiplied by 50-100m, and a geological observation route is arranged perpendicular to the direction of the stratum; in favorable mining areas such as black rock series, structural broken zones and the like, the network density should be properly encrypted, and the black rock series must be traced and observed to find out the form, the production state, the scale and mineralization clues; the method comprises the following steps that (1) the ground particles are arranged in a representative section, a GPS positioning system is used for positioning fixed points, and position marks and point numbers of observation points are displayed on the ground; the fixed point error is required to be not more than 2mm on the graph, and each square kilometer of geological points is not less than 30; the black rock series geologic body with the thickness of more than 10m, the width of more than 5m and the length of more than 50m should react on the map, and is exaggerated in a geological map of 1:1 ten thousand; the characteristics of mineralization, alteration, structural trails and the like in the black rock system are mainly observed, a sketch map or a photograph is drawn, and the relevance among various phenomena of stratum, structure, mineralization, alteration and the like is particularly required to be noticed; and preliminarily screening out black rock system distribution areas, and accurately compiling a black rock system distribution rule graph.

Preferably, in the method for finding the vanadium-molybdenum ore in the black rock system, in the step (2), geochemical measurements of 1:1 ten thousand of soil are carried out on the geochemical comprehensive abnormal area and the black rock system distribution area defined in the step (1), a 1: 5 ten thousand water system sediment abnormal concentration central part is combined in the black rock system distribution area, a vertical construction line, a mineralization zone and an alteration zone are arranged, and the vertical construction line, the mineralization zone and the alteration zone pass through the center of the concentration area and are laid according to a regular network of 100 x 40 m; positioning of sampling points adopts GPS navigation combined with topographic map positioning, positioning errors are smaller than 1mm on a 1:1 ten thousand topographic map, in order to increase the representativeness of a sample, the sampling points are uniformly collected within a range of 1/3 points around the designed sampling points, and generally 2-3 sampling points are combined into one sample; the same working area is required to collect the medium with the same property and the substance with the same layer, the surface layer is required to be stripped when a sample is collected, and the single lithologic part at the upper part of the weathered bedrock, which is 10-50cm deep from the surface of the ground, is generally collected to collect the chippings with edges or semi-edges, namely B, C layers of soil, so that organic matters, windage, salt deposit and clayey matters are avoided; and (3) making an element combination abnormal graph for the test data by using Geochem Studio and Mapgis software, calculating the abnormal lower limit, relative standard deviation, abnormal area, contrast, concentration banding and other characteristic values of each single element, performing comprehensive sequencing by using abnormal scale (abnormal area x contrast), further evaluating the mineralization potential of the single element, and reducing the target area for finding the ores.

Preferably, in the method for finding the black rock series vanadium-molybdenum ore, in the step (3), according to the comprehensive abnormal map of the geochemical measurement of the soil of 1:1 ten thousand defined in the step (2), 1:2000 rock geochemical profiles are deployed in the key abnormal section for tracing control, the 1:2000 rock geochemical profiles are arranged to be perpendicular to the trend of the black rock series stratum, the profile measurement adopts a half-instrument method, compass orientation and tape measure distance, and the starting point and the ending point are positioned by the corrected GPS. The sampling length is typically 5m, and sequential block sampling within a 5m segment should not allow cross-layer sampling. The sampling medium is fresh bedrock, the lithologic property is single, the mineralization poor region is properly diluted, the mineralization obvious region can be properly encrypted, the special geologic body (a structure, a mineralizer, a mineralization clue and the like) with the thickness of more than 2m is amplified and expressed, and the characteristics of a main broken altered zone, the mineralization property of the special geologic body and the like are recorded in detail. Preferably, mineralized altered zones are initially marked off.

Preferably, in the method for finding the vanadium-molybdenum ore in the black rock series, in the step (4), according to the mineralization alteration zone preferably selected in the step (3), by combining the characteristics of mineralization alteration and abnormality of the black rock series on the ground surface, a sounding groove is deployed for disclosure control; the method is characterized in that the specific arrangement of the groove exploration work is carried out on the basis of combining field exploration, surface mineralization and abnormal characteristics, the groove exploration work is arranged in a mineralized section with the coverage thickness of no more than 3m in the fourth system of the surface of the earth and is arranged in the direction vertical to the trend direction of the black rock system stratum, the groove bottom width is required to be not less than 0.5-0.8m, the depth is not more than 3m, the exposed fresh bedrock reaches 0.3-0.5m, and the principle of observing clear production state is taken as the principle; chemical sample grooves are arranged at the joints of the groove walls and the groove bottoms, the sample grooves are drawn on the spot by using red paint and marked with sample numbers, stepped sampling is avoided, a grooving method is used for sampling, the specification of the sample grooves is 10 multiplied by 3cm, the weight error rate of samples is not higher than 10%, the rock surface of sampling points needs to be cleaned during sampling, surrounding cloth is hung, the samples are guaranteed not to be polluted and splashed, the acquisition method is strictly carried out according to the specification, the samples are distributed according to the same direction and the same inclination angle, and all the samples are connected end to end; except for chemical samples, rock sample full-groove control is also needed to be sampled at intervals of 2-5 m; the ore body is revealed, traced and controlled through the groove exploration work, the shape, the production form and the scale of the ore body are preliminarily found out, and the surface ore body is defined.

Preferably, in the black rock system vanadium molybdenum ore prospecting method, in the step (5), according to the characteristics of ore bodies or mineralized bodies in the earth surface and the prospecting groove in the step (4), high-grade and large-scale vanadium molybdenum ore bodies are preferably deployed and drilled, and the specific drilled holes are positioned in the vanadium molybdenum mineralization enrichment section on the earth surface and are specifically positioned by referring to the factors of stratum occurrence and terrain; the construction of the drilling engineering is an inclined hole, the construction method adopts large-caliber directional drilling as much as possible, and the caliber of a final hole is not less than 75 mm; the average mining rate of the ore body and the ore core and the rock core in the top and bottom plates of the ore body are not lower than 80 percent, the continuous length of the mining rate of the ore core in the thick and large ore body which is lower than 90 percent cannot exceed 5m, otherwise, remedial measures are adopted, the average mining rate of the layering of the rock core of the surrounding rock is required to be not lower than 80 percent, the geological phenomena of the ore layer or the mineralization layer and the top and bottom plates, the mineralization alteration zone and the main section of the structural part of the ore layer or the mineralization layer are described in detail and are accompanied with necessary sketch and photography, and after core splitting sampling, supplementary description records are carried out on the important mineralization phenomena; the drilling sampling method is that the core is split into two parts along the long axis direction of the core and the mineralization uniformity, one part is used as a basic analysis sample and sent to a test unit for processing and assay, and the other part is reserved for checking and research; the cross-layer sampling can not be carried out on the ore body, the sample length is 1.5m, the longest length is not more than 2m, and the circle edge samples are taken from the two sides of the ore body; the change conditions of deep grade, thickness, scale and production of the vanadium-molybdenum ore body are known through drilling engineering, so that the deep ore body or ore deposit can be found.

Through the technical scheme, compared with the prior art, the invention discloses and provides a black rock system vanadium molybdenum ore prospecting method, through the recent exploration and prospecting technical method tests, a large trunk groove mouth vanadium molybdenum ore deposit is taken as a key research object, a batch of black rock system polymetallic ore points and mineralization points are newly found in the periphery and the peripheral area of the ore deposit, the important prospecting finding for searching the black rock system metal ore is obtained, and a plurality of prospecting target areas are optimized, so that the exploration technical method combination has a good prospecting effect in the black rock system polymetallic ore area.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of a process for finding a mine according to the present invention;

FIG. 2 is a comprehensive abnormal diagram of sediment measurement in a 1: 5 ten thousand water system general investigation area of a large trunk entrance;

FIG. 3 is a comprehensive abnormal analysis diagram of the large trunk opening AS 18-3;

FIG. 4 is a comprehensive abnormal analysis diagram of the large trunk opening AS 18-4;

FIG. 5 is a comprehensive abnormal analysis chart of the large trunk opening AP 13;

FIG. 6 is a comprehensive abnormal analysis chart of the large trunk opening AP 14;

FIG. 7 is a cross-sectional view of geological rock at DGDYP7 with large trunk openings;

FIG. 8 is a cross-sectional view of geological rock at DGDYP9 with large trunk openings;

fig. 9 is a cross-sectional view of the exploratory line of large trench opening No. 9.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the embodiment of the invention discloses an ore-finding method for black rock series vanadium-molybdenum ore, which comprises the following steps:

a. measuring 1: 5 ten thousand water system sediments in a to-be-developed area, delineating a single element water system sediment abnormal distribution map, further evaluating the mineralization potential of the single element, and reducing an ore finding target area;

according to regional geological backgrounds and sedimentary rock stratum distribution areas, performing 1:1 ten thousand geological sketch survey on key areas by using a large-scale geological survey means, preliminarily screening out black rock system distribution areas, and accurately compiling black rock system distribution rule graphs;

b. carrying out geochemical measurement of 1:1 ten thousand of soil in a comprehensive abnormal area which is circled by combining a black rock system distribution area and 1: 5 ten thousand of water system sediment measurement, and further reducing an abnormal target area;

c. carrying out 1:2000 rock geochemical profile measurement on the delineated 1:1 ten thousand soil geochemical abnormal key sections and the discovered alteration broken zones, and preferably selecting black rock series ore-containing sections;

d. c, according to the preferable ore-containing black rock section in the step c, by combining the characteristics of the surface mineralization alteration zone, deploying a sounding groove for disclosure control, and delineating an mineralized body or an ore body;

e. and d, preferably, deploying the high-grade and large-scale vanadium-molybdenum ore body to drill holes for deep verification according to the characteristics of the ore body or the mineralized body in the step d, and specifically delineating the ore body.