CN113946950B - Method for rapidly delineating target area of gold prospecting - Google Patents
Method for rapidly delineating target area of gold prospecting Download PDFInfo
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Abstract
The invention belongs to the technical field of geological science, and particularly discloses a method for rapidly delineating a gold mine prospecting target area, which can be used for predicting gold mines in an area with low working degree. Dividing a mineral forming system, selecting a typical deposit, and then establishing a typical deposit mineral forming mode and a typical deposit prospecting mode; establishing a mineralization mode of the mineralization system according to the mineralization system, and extracting abnormal series; establishing a mining system mining model according to the result, and determining the geological necessary conditions of mining according to the mining effect on the basis of the mining system mining model; calculating the lower limit of the Au prediction abnormity, and performing geochemical abnormity delineation; preliminarily delineating a predicted target area according to necessary conditions of the mineralogy geology and a geochemical abnormal delineating result; compiling a prospecting forecasting picture on the basis of a gold mine forecasting basic picture according to the preliminarily delineated forecasting target area; and determining a key target finding area and a general target finding area according to the ore finding prediction graph, carrying out field inspection and verification on the key target finding area, and evaluating an ore finding prospect according to a verification result.
Description
Technical Field
The invention relates to the technical field of geological science, in particular to a method for rapidly delineating a target area of a gold mine prospecting.
Background
The mineralization is a very complex system, a large amount of mineralization information can be generated, and when the mineralization prediction is carried out, dozens of or even hundreds of information (variables) are selected for research, calculation and analysis from the aspects of land, material, chemical and remote places and the like, so that no information is missed. However, in the case of the mineralization prediction, it is extremely difficult to acquire information in an area with an extremely low working degree, so that the mineralization prediction is very difficult.
The research of gold mine mainly starts after the nineties of the twenty-century, and the research of ore deposit mining conditions, mining characteristics, ore control factors, ore exploration marks and ore exploration directions is carried out by exploration units in most cases along with the discovery of ore deposits. Most of the researches are researches on single ore deposits, are focused on production application, are weak in research on an ore formation structure and an ore formation mode, are just started to research on ore formation series, have not been deeply researched from the perspective of an ore formation system theory, are still to be deeply known in regional ore formation rules, and are weak in research on ore finding prediction.
In recent years, prediction theories such as "similarity analogy", "geological anomaly", "deposit cause pattern" or "mineralization system" are widely applied, but because of the complexity of mineralization, the characteristics and signs of gold deposits are not completely consistent, the required technical method is not uniform, and the single prediction method is very limited to the prediction of gold deposits.
Therefore, it is an urgent problem to be solved by those skilled in the art to provide a method for rapidly delineating a gold mine exploration target area.
Disclosure of Invention
In view of the above, the invention provides a method for rapidly delineating a gold mine prospecting target area, which takes a theory of a mineralization system as guidance, and takes the obtained understanding of mineralization laws and an established prospecting model as a basis, extracts prospecting prediction elements, utilizes a 'synergistic prediction' thinking, carries out research area gold mine prospecting prediction, delineating the prospecting prediction target area and guides area gold mine prospecting through the processing and abnormal delineation of water system sediment measurement data, and combines with heavy sand abnormity, geophysical abnormity, remote sensing abnormity and the like.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for rapidly delineating a target area of gold prospecting comprises the following steps:
(1) Collecting existing materialized remote data in a research area, and editing a series of drawings on a base map with the same scale to form a thematic base map; according to the integrated materialized exploration result and heavy sand measurement result, compiling a comprehensive abnormal graph and a known gold deposit on a special base map to form a gold deposit prediction basic graph;
(2) Dividing the materials into a large class of mining systems according to existing materialization remote data in a research area and a structural dynamic system; the large category of the ore forming systems is divided into ore forming systems according to an ore forming mechanism;
(3) Selecting a typical ore deposit in the research area according to the existing materialization and telemetering data of the mineralization system and the research area, then carrying out field investigation, collecting samples, carrying out testing and outputting a test result; outputting a geological background produced by the gold mine according to the test result, carrying out geochemical tracing research on the sulfur and lead isotopes, and outputting a gold mine mineralization time and a mineral deposit formation reason; establishing a typical deposit mining mode and a typical deposit prospecting model according to the deposit cause;
(4) Establishing a mineralization mode of the mineralization system according to the mineralization system, and extracting abnormal series; establishing a mining finding model of the mining system by combining the mining mode of the mining system, the typical deposit mining mode and the abnormal series; obtaining necessary conditions of the mineralization geology according to the mineralization effect on the basis of an mineralization system prospecting model;
(5) Counting abnormal elements of the gold deposit in the research area, and calculating the correlation coefficient of the abnormal elements and Au; then, calculating a comprehensive predicted value by using the correlation coefficient, calculating an Au predicted abnormity lower limit according to a geochemical element data processing method, and performing geochemical abnormity delineation;
(6) Preliminarily delineating a predicted target area according to necessary conditions of mineralization geology and a geochemical abnormal delineating result; determining geophysical abnormity, remote sensing abnormity and heavy sand abnormity through a comprehensive information prediction method, and then compiling a prospecting prediction map on the basis of a gold prospecting prediction basis map according to a preliminary delineating prediction target area; and determining a key target finding area and a general target finding area according to the ore finding prediction graph, carrying out field inspection and verification on the key target finding area, and evaluating an ore finding prospect according to a verification result.
The beneficial effects of the preferred technical scheme are as follows: according to the invention, the theory of an ore-forming system is taken as guidance, on the basis of an established ore-forming mode of the ore-forming system, abnormal series in the ore-forming system are researched in detail, and an ore-forming system ore-finding model is established, so that the ore-finding efficiency is higher, and the accuracy is also obviously improved; necessary geological conditions of the finished ore are combed according to the characteristics of different finished ore systems, and the control effect of the deep shell mantle on the gold ore is particularly concerned, so that the ore finding error can be reduced, and the manpower and material resources are greatly saved; the geochemical data is researched by adopting a 'collaborative optimization prospecting prediction' method, the accuracy of research results is improved, and the target area of gold prospecting is favorably and rapidly defined.
Preferably, the series of maps in step (1) comprise a geological mineral map, a structural construction map, a materialized exploration result map, a heavy sand measurement result map and/or a remote sensing result map.
The beneficial effects of the preferred technical scheme are as follows: all main ore control factors can be expressed in a striking way, and the distribution rules of the found ore areas and ore deposits and the relation of the ore control factors on space, time and cause are expressed, so that the extraction of ore prediction elements in subsequent work is more convenient.
Preferably, the mining system in step (2) comprises an extended-structure mining system, an extruded-structure mining system, a sliding-structure mining system, a hump-structure mining system, a sedimentation-structure mining system, a large-scale flexible shear mining system and/or a meteoritic structure mining system;
the mineralization system comprises a magma mineralization system, a hydrothermal mineralization system, a deposition mineralization system, a biological mineralization system and/or a modified mineralization system.
The beneficial effects of the preferred technical scheme are as follows: the research of the mineralization system is based on the general deposit cause, focuses on discussing the regional mineralization law from the macroscopic view, can comprehensively understand the occurrence, development and action process of the mineralization on the whole, establishes strategic point of view and overall thought in the prospecting prediction, promotes the regional prospecting and resource potential evaluation work, and is different from the traditional prediction method.
Preferably, said collecting the sample in step (3) comprises collecting an annual sample on the roof of said typical deposit and then collecting the chemistry uniformly around said annual sample;
the test comprises the steps of taking the chemical sample to carry out main element analysis, rare earth element analysis, trace element analysis, sulfur isotope analysis and lead isotope analysis; and (4) taking the dating sample to perform zircon LA-ICP-MS dating analysis and 40Ar-39Ar isotope dating analysis.
The beneficial effects of the preferred technical scheme are as follows: the typical deposit research is the basis for revealing the mineralization rule and is an important component of mineral deposit prediction and evaluation work, the typical deposit can represent the commonalities of similar deposit output positions, formation conditions, mineral finding marks and the like in a certain geological environment or deposit type, the formation mechanism of the deposit type can be more intuitively revealed through the test analysis of a sample, the characteristics of key geological factors (such as mineralization geological background, mineral sources, physicochemical conditions of mineralization, substitution during mineralization and the like) of the formation are known, and the mineralization mode and the mineral finding model of the deposit type can be more conveniently established.
Preferably, the typical deposit mineralization mode is to summarize and explain the deposit elements; the deposit elements include: geological environment, mineralization and deposit cause mechanism, wherein the deposit elements further comprise geological features, geophysical features, geochemical features and remote sensing geological features displayed by typical deposits along with time and space change;
the ore finding model is based on an ore deposit forming model and aims at summarizing and summarizing favorable geological conditions, effective ore finding technical means and various direct or indirect mineralization information which are necessary for forming gold ores.
The invention is based on the background of the mineralization structure in different earth structure gyrations in the research area, and the beneficial effects of the mineralization mechanism and the mineral-containing preferable technical scheme are as follows: building and mineralizing environments, dividing regional structure units and typical ore deposit research results are taken as bases, ore deposits and ore deposit point characteristics found in a research area are combined to be divided into ore forming systems, the source, transportation, storage and guarantee conditions of the ore forming systems are researched, regional mineralizing rules are summarized, and gold ore mineralizing modes and ore finding models of different ore forming systems are established.
Preferably, the anomaly series in step (4) comprise geochemical anomalies, geophysical anomalies, remote sensing anomalies and/or heavy sand anomalies;
the mineralizing effect includes formation-tectonic-magmatic effect and/or deep mantle effect.
The beneficial effects of the preferred technical scheme are as follows:
preferably, the correlation coefficient in step (5) is calculated by R-type cluster analysis;
the calculation formula of the comprehensive predicted value is as follows:
Au prediction ＝Au/Au average +a*A/A average +b*B/B average + \8230; water system measurement original value with Au as gold element in formula average The average value of all original values of the gold elements in the research area is obtained; a or B is the water system measurement raw value of the elements related to the gold ore, respectively, A average Or B average Is the average value of the original values of the elements related to the gold ores in the research area, and a is the element A and the gold elementThe correlation coefficient of element, B is the correlation coefficient of B element and gold element;
Au prediction The lower anomaly limit is calculated by the formula: lower abnormality limit = X +2 × sd; wherein X is Au Prediction Sd is Au Prediction Standard deviation of (2). Eliminating the maximum/minimum values in the data, namely eliminating the standard deviation more than or less than three times until no elimination point exists, and then adding 2 times of standard deviation to the mean value to obtain the lower limit of the abnormality.
The beneficial effects of the preferred technical scheme are as follows: starting from direct mine finding information, the chemical exploration data is comprehensively processed and analyzed, and key information combinations with the characteristics of small quantity, mutual connection, consistent targets, revealing essential characteristics of mine formation and the like are extracted from the chemical exploration data, so that weak information closely related to a specific mine finding target is strengthened, and mine-caused abnormalities are highlighted. According to the method, the purposes of quickly reducing the target area of the ore prospecting, quickly approaching the target of the ore prospecting and quickly finding the ore deposit can be achieved.
Compared with the prior art, the method for rapidly delineating the target area of the gold mine has the following beneficial effects that:
(1) The mineralization system of the invention develops research from the aspects of formation, change and storage of ore deposit, ore deposit series and mineralization abnormity series, and is more favorable for guiding the prospecting prediction; gold mine prediction can be carried out in areas with low working degree;
(2) According to the invention, the theory of an ore-forming system is taken as guidance, on the basis of an established ore-forming mode of the ore-forming system, abnormal series in the ore-forming system are researched in detail, and an ore-forming system ore-finding model is established, so that the ore-finding efficiency is higher, and the accuracy is also obviously improved;
(3) Necessary geological conditions of the mineralization are combed according to the characteristics of different mineralization systems, and the control effect of the mantle effect of the deep shell on gold ores is particularly concerned, so that the prospecting error can be reduced, and manpower and material resources are greatly saved;
(4) The geochemical data is researched by adopting a 'synergistic prospecting prediction' method, the method emphasizes that variables can reflect main mineralizing elements, requires fewer variables rather than comprehensive variables, emphasizes the correlation among data, improves the accuracy of research results and is beneficial to quickly delineating gold prospecting target areas.
(5) By using the comprehensive information prospecting prediction method for reference, comprehensive research is carried out on geophysical information, remote sensing information, heavy sand information and existing mineralization clues in the preliminary delineating prospecting target area, relevant map pieces for prospecting prediction are compiled, the key target area and the general target area are divided, field inspection and verification are carried out on the key target area, and the prospecting prospect is evaluated.
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 flow chart of a method for rapidly delineating a target area of a gold mine in an embodiment of the invention;
fig. 2 is a drawing showing an ore forming mode of a dynamic reforming ore forming system of triassic south-snake green mixed rock in example 1.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
The embodiment of the invention discloses a method for rapidly delineating a target area of gold prospecting, which comprises the following steps:
(1) Collecting existing materialization and telemetry data of a research area, and compiling a series of diagrams on a base map with the same scale to form a thematic base map; according to the integrated materialized exploration result and the heavy sand measurement result, compiling a comprehensive abnormal graph and a known gold deposit on a special base map to form a gold prediction basic graph;
the series of maps comprise a geological mineral map, a structural building map, a materialized exploration result map, a heavy sand measurement result map and/or a remote sensing result map;
(2) Dividing the materials into a large class of mining systems according to existing materialization remote data in a research area and a structural dynamic system; the large category of the ore forming systems is divided into ore forming systems according to an ore forming mechanism;
wherein the mining system is mainly extended to form a mining system, extruded to form the mining system, sliding to form the mining system, humped to form the mining system, settled to form the mining system, large-scale toughness shearing to form the mining system and/or merle to form the mining system; the mineralization system comprises a magma mineralization system, a hydrothermal mineralization system, a deposition mineralization system, a biological mineralization system and/or a modified mineralization system;
(3) Selecting a typical ore deposit in a research area according to existing materialization and telemetering data of an mineralization system and the research area, then carrying out field investigation, collecting a sample, testing and outputting a test result; outputting a geological background produced by the gold mine according to the test result, carrying out geochemical tracing research on the sulfur and lead isotopes, and outputting a gold mine mineralization time and a mineral deposit cause; establishing a typical deposit mining mode and a typical deposit prospecting mode according to the deposit cause;
wherein collecting the sample comprises collecting a dating sample at the roof of a typical deposit and then uniformly collecting chemistry around the dating sample; the test comprises the steps of taking a chemical sample to carry out main element analysis, rare earth element analysis, trace element analysis, sulfur isotope analysis and lead isotope analysis; taking a year-measuring sample to carry out zircon LA-ICP-MS (LA-inductively coupled plasma-mass spectrometry) year-measuring analysis and 40Ar-39Ar isotope year-measuring analysis;
(4) Establishing a mineralization mode of the mineralization system according to the mineralization system, and extracting abnormal series; establishing an ore-formation system ore finding model by combining an ore-formation system ore-formation mode, a typical ore deposit ore finding mode and an abnormal series; obtaining necessary conditions of mineralization geology according to the mineralization effect on the basis of an mineralization system prospecting model;
the anomaly series comprise geochemical anomalies, geophysical anomalies, remote sensing anomalies and/or heavy sand anomalies; mineralisation includes formation-tectonics-magma-tion and/or deep shell mantle action.
(5) Counting abnormal elements of the gold deposit in the research area, finding out related elements of Au and calculating a correlation coefficient; then, calculating a comprehensive predicted value by using the correlation coefficient, calculating an Au predicted abnormity lower limit according to a geochemical element data processing method, and performing geochemical abnormity delineation;
wherein, the correlation coefficient is calculated by R-type clustering analysis; au coating Prediction
＝Au/Au average +a*A/A average +b*B/B average + \8230; water system measurement original value with Au as gold element in formula average The average value of all original values of the gold elements in the research area; a or B is the water system measurement raw value of the elements related to the gold ore, respectively, A average Or B average The average value of original values of elements related to gold ores in a research area is shown, wherein a is a correlation coefficient of an element A and a gold element, and B is a correlation coefficient of an element B and the gold element;
Au prediction The lower anomaly limit is calculated by the formula: lower abnormality limit = X +2 sd; wherein X is Au Prediction Sd is Au Prediction The standard deviation (eliminating the maximum/minimum value in the data, the standard deviation more than or less than three times until there is no elimination point, then obtaining the lower limit of the abnormality by adding 2 times of standard deviation to the mean value)
(6) Preliminarily delineating a predicted target area according to necessary conditions of the mineralogy geology and a geochemical abnormal delineating result; determining geophysical abnormity, remote sensing abnormity and heavy sand abnormity through a comprehensive information prediction method, and then compiling a prospecting prediction map on the basis of a gold prospecting prediction basis map according to a preliminary delineating prediction target area; and determining a key target finding area and a general target finding area according to the mine finding prediction graph, carrying out field inspection and verification on the key target finding area, and evaluating the mine finding prospect according to a verification result.
Example 1
The embodiment 1 of the invention takes camel way channel gold mine as an example, and provides a method for rapidly delineating a target area of gold mine prospecting, which specifically comprises the following steps:
(1) The cobalt gold ore of the camel road ditch is positioned in the west section of the east Kunlun mountain, a Kunlan land edge moving zone in a general survey area, and a camel road ditch zone which is about 7km away from the northern side of Kunlan fracture. The direction of the in-zone structure line is the direction of the near east west and is consistent with the direction of the zone structure line. The exposed stratum of the mining area is only an Ordoku-Shineta red platform group Harabay ditch group and is constructed by a set of coastal-shallow marine clastic rock, volcanic rock-carbonate rock. The formation is significantly controlled by the formation. The direction of the in-zone structure line is the direction of the near east west and is consistent with the direction of the zone structure line. The fracture and fold structure in the zone is relatively developed, the fracture structure mainly takes two forms of regional toughness shear band and brittle fracture, and the fold structure mainly takes the form of small crumpling between layers; invasion rock is not developed, and pulse rock is relatively developed; the metamorphic effect is mainly regional metamorphic effect, and partial dynamic metamorphic exists.
According to the classification principle of the types of the mineralization systems, the gold mineralization systems of the east Kunlun Western-Severe section are classified into 3 types, 4 types and 6 mineralization systems. The camel way ditch cobalt gold ore forming system is a triassic south-snake green mixed rock belt power transformation ore forming system.
(2) The black sea northern gold deposit, the fire ditch-black thorn ditch gold deposit of the large kitchen range, the black thorn ditch gold deposit, the Naakatai gold deposit, the small trunk ditch gold deposit, the Nangou gold deposit and the like formed by the ore forming system have quite similar ore forming characteristics, and ore bodies are produced in the ductile-brittle deformation conversion part of the ductile shear zone or the brittle fracture beside the ductile shear zone, the surrounding rocks are changeable, are not limited to a certain specific stratum and reflect that the ore forming is mainly controlled by the ductile shear zone. The mineralizing substances originate from deep metamorphic hot liquids.
Therefore, the small-trunk-ditch gold deposit is selected as a typical deposit of the ore forming system in the prediction, is positioned at the west end of the southern sub-zone of the deep fracture zone in Kunlun, and belongs to the snow mountain peak-Buerhan cloth achievement ore sub-zone of the east Kunlun ore forming zone. Since late ancient times, some mountain-making deposits were formed in the environment of guttisi ocean closed-postland-to-land collisions, mainly controlled by kunzhong and kunan fractures. The small dry ditch gold ore is controlled by the activity of breaking for a long time, the breaking provides a favorable channel and an ore storage space for ore-containing hydrothermal activity and migration and enrichment of ore-forming elements, a series of quartz vein-shaped ore bodies existing in broken altered zones and structural cracks are formed, and gold mineralization is closely related to silicification, sericitization, pyrite mineralization and arsenopyrite mineralization. The established mineralizing patterns are shown in table 1 by extracting important mineralizing elements.
TABLE 1 Ore-forming mode of small-trunk-ditch gold deposit
(3) Combining the research of the classic mine and the analysis of regional data, the mining mode of the mining system is established as follows:
the three superimpositions later enter a rear collision environment after closing of the ancient Tetizsan, the whole area is under the condition of structural stress of extruding and sliding deformation, deep and great fracture activities of Kunzhong and Kunzan are strong, deep metamorphic hydrothermal solution is conducted, and the development of a toughness shear band is controlled. The deep metamorphic hot liquid moves upwards under the control of the toughness shear band, and the gold initially enriched in rocks such as surrounding rocks, namely mesobasic volcanic rocks is continuously extracted to form gold-containing metamorphic hot liquid. In the ductile shear zone ductile-brittle deformation transition zone or the side brittle fracture, structural crack or interlaminar structural zone, because of the reduction of pressure and the reduction of the temperature of the gold-containing metamorphic hot liquid, the mineral elements such as gold and the like are precipitated to form minerals (as shown in figure 2)
The mineral forming system is formed in a collision mountain-making environment after the late three-fold of life and is controlled by the strong shell mantle material exchange effect caused by the dismantling and sinking effect in the post-collision stage. The area with the positive value of the epsilon Hf (t) can be used as an advantageous condition for the ore-searching prediction of the ore-forming system. Deep metamorphic hot liquid is conducted by deep fractures in Kunbei, kunzhong and Kunnan, the early-stage toughness shear band is promoted to revive, the migration of the deep metamorphic hot liquid is controlled, the metamorphic hot liquid continuously extracts beneficial elements in surrounding rocks in the rising process to form gold-containing hot liquid, and the gold-containing hot liquid is enriched into ores in the toughness and brittleness deformation transition part of the toughness shear band or in the brittleness fractures beside the toughness shear band. Deep and large fractures are main ore control structures, and ductile shear zones, secondary brittle fractures, structural cracks or interlaminar fracture zones and the like are good ore storage structures. The construction activity provides an important material source for the mineralization system, the mineralization materials mainly come from deep parts, and the mineralization materials such as Au and the like enriched in early stage in the medium-base volcanic rock in the stratum can be activated and migrated in the mineralization process and added into the mineralization system.
The mineralization of the surrounding rock is mainly developed and silicified, sericinized, chlorite petrochemical, carbonated, argillized, pyrite mineralized, arsenopyrite mineralized and the like, and has abnormal remote sensing alteration information. The ore has simple mineral components, mainly including pyrite, arsenopyrite, a small amount of natural gold, chalcopyrite and the like. The geochemical comprehensive predicted value abnormity is an important and necessary condition (except a fourth series coverage area), and a banded geomagnetic abnormity step band which can reflect a linear structure can be used as a reference basis for ore finding prediction.
According to the method, a prediction model for prospecting of the triassic south-snake green mixed rock mining system with dynamic modification is established.
TABLE 2 prediction model for prospecting of mineral system by dynamic reconstruction of green mixed rock of south-snake Triterse
(4) Then, a 'synergistic prediction method' is utilized to determine the prediction index of the combined elements of the gold deposits in the east Kunlun Western section, and five elements of Au, ag, as, sb and Cu in the east Kunlun Western section are counted (Table 3). It can be seen that, in general, the higher the content of Au element, the higher the content of As and Sb elements.
TABLE 3 statistical table of measured element anomaly of water system deposit of gold deposit (ore deposit and mineralization deposit) in east Kunlun West section
As can be seen from the statistical table (Table 4) of the correlation coefficient (gamma 1) of the average values of the five elements of the gold deposit, the correlation coefficient of the average value of the Au element and the average value of the As element is up to 0.95, and the correlation coefficient of the Au element and the average value of the Sb element is 0.17. The Au element peak intensity totally reflects the mineralization enrichment degree and is also an important parameter of mineralization, and As can be seen from a statistical table (Table 5) of peak correlation coefficients (gamma 2) of five elements of a gold deposit, the correlation coefficient of the Au element peak and the As element peak is As high As 0.88, the correlation coefficient of the Au element peak and the Sb element peak is 0.37, and the correlation coefficient of the Cu element peak is 0.20. In order to reflect the correlation coefficient between the mineralizing elements as a whole, a comprehensive coefficient (γ = (γ 1+ γ 2)/2) was used, as shown in table 6.
TABLE 4 statistical table of average correlation coefficients of five elements in the east Kunlun West section gold mine
| Element(s) | Au average | Ag average | As average | Sb average | Cu average |
| Au average | 1.00 | ||||
| Ag average | -0.02 | 1.00 | |||
| As average | 0.95 | 0.01 | 1.00 | ||
| Sb average | 0.17 | 0.03 | 0.23 | 1.00 | |
| Cu average | -0.14 | 0.35 | -0.08 | 0.14 | 1.00 |
TABLE 5 statistical table of correlation coefficients of five elements in the west segment of gold mine of east Kunlun
| Element(s) | Au max | Ag max | As max | Sb max | Cu max |
| Au max | 1.00 | ||||
| Ag max | -0.04 | 1.00 | |||
| As max | 0.88 | -0.02 | 1.00 | ||
| Sb max | 0.37 | 0.25 | 0.51 | 1.00 | |
| Cu max | 0.20 | 0.68 | 0.15 | 0.31 | 1.00 |
TABLE 6 statistical table of related coefficient (gamma) of Au, ag, as, sb and Cu elements in Western-segment gold mine of east Kunlun
| Element(s) | Au | Ag | As | Sb | Cu |
| Coefficient of integration (gamma) | 1.00 | -0.03 | 0.92 | 0.27 | 0.03 |
As can be seen from Table 6, the content of Au is highly correlated with the content of As and Sb elements, but is not substantially correlated with Ag and Cu elements. According to the method, the determined prediction combination elements are Au, as and Sb, and the comprehensive prediction value (Au) Prediction ) Using Au/Au average +0.92*As/As average +0.27*Sb/Sb average And (6) calculating to obtain. Then, au is calculated for the comprehensive predicted value by referring to a general geochemical element data processing method Prediction And the lower anomaly limit defines two Au anomalies. And combining the established ore-finding prediction model of the ore-forming system to successfully predict two target areas of the camel way ditch gold mine and the camel way ditch east gold mine.
Taking the camel way ditch cobalt gold mine as an example, the mining area belongs to a camel way ditch cobalt and copper mining area in a snowy mountain peak-Boolean Bradywatsi-Yizhiphase cobalt, gold, copper and jade (rare and rare earth) mining area (divided according to a three-wheel division of Qinghai province). The exposed stratum is only an Otto-Shinetera erythrotai group Harabay ditch group, is built from a set of coastal-shallow marine clastic rock, volcanic rock-carbonate rock, and is obviously controlled by the structure. The predecessors carried out a series of mineral exploration works in the mining area, and 32 cobalt ore bodies and 1 gold ore body were circled out. Through the prediction work, the camel road ditch is divided into key target areas, and mineral product inspection work is carried out. Firstly, carrying out 1 ten thousand route geological survey on the contact parts of the second lithologic section and the third lithologic section of the Harabay ditch group in the middle of a target area, a toughness shear band and a short ditch southeast Au high-content section, and preliminarily delineating a plurality of Au mineralization favorable sections; then further refining the abnormity, finding an ore-forming favorable section, delineating a gold mineralization zone in the southwest part of the target region, simultaneously checking a former 1 ten thousand section Au element high-value section and an Au mineralization favorable section (a toughness shear zone at the middle side of a general survey region) by utilizing 1.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. A method for rapidly delineating a gold mine prospecting target area is characterized by comprising the following steps:
(1) Collecting existing materialized remote data in a research area, and editing a series of drawings on a base map with the same scale to form a thematic base map; according to the integrated materialized exploration result and the heavy sand measurement result, compiling a comprehensive abnormal graph and a known gold deposit on a special base map to form a gold prediction basic graph;
(2) Dividing the existing materialization and telemetering data of a research area into a large class of a mining system according to a structural dynamic system; the large category of the ore forming systems is divided into ore forming systems according to an ore forming mechanism;
(3) Selecting a typical ore deposit in the research area according to the existing materialization and telemetering data of the mineralization system and the research area, then carrying out field investigation, collecting samples, carrying out testing and outputting a test result; outputting a geological background produced by the gold mine according to the test result, carrying out geochemical tracing research on the sulfur and lead isotopes, and outputting a gold mine mineralization time and a mineral deposit formation reason; establishing a typical deposit mining mode and a typical deposit prospecting mode according to the deposit cause;
(4) Establishing a mineralization system mineralization mode according to the mineralization system, and extracting abnormal series; establishing a mining finding model of the mining system by combining the mining mode of the mining system, the typical deposit mining mode and the abnormal series; obtaining necessary conditions of the mineralization geology according to the mineralization effect on the basis of an mineralization system prospecting model;
(5) Counting abnormal elements of the gold deposit in the research area, and calculating the correlation coefficient of the abnormal elements and Au; then, calculating a comprehensive predicted value by using the correlation coefficient, calculating an Au predicted abnormity lower limit according to a geochemical element data processing method, and performing geochemical abnormity delineation;
the correlation coefficient is calculated by an R-type clustering analysis method;
the calculation formula of the comprehensive predicted value is as follows:
Au prediction ＝Au/Au average +0.92*As/As average +0.27*Sb/Sb average (ii) a In the formula, au is
Aqueous measurement of the original value of the gold element, au average The average value of all original values of the gold elements in the research area is obtained; as or Sb are water system measured raw values of arsenic or antimony which are elements related to gold ore respectively, as average Or Sb average 0.9 average of the original values of the elements arsenic or antimony associated with the gold ore in the study area2 is the correlation coefficient of arsenic element and gold element, 0.27 is the correlation coefficient of antimony element and gold element;
the Au is Prediction The lower anomaly limit is calculated by the formula: lower abnormality limit = X +2 sd; wherein X is Au Prediction Sd is Au Prediction Standard deviation of (d);
(6) Preliminarily delineating a predicted target area according to necessary conditions of the mineralogy geology and a geochemical abnormal delineating result; combining the geophysical abnormity, remote sensing abnormity and heavy sand abnormity characteristics of the research area, and then compiling a prospecting prediction image on the basis of a gold prospecting prediction basis image according to the preliminarily delineated prediction target area; determining a key target finding area and a general target finding area according to the ore finding prediction graph; and (5) performing field inspection and verification on the key target finding area, and evaluating the prospect of finding the mine according to a verification result.
2. The method for rapidly delineating the target area of gold exploration according to claim 1, wherein said series of maps in step (1) comprise geological mineral maps, tectonic maps, materialized exploration result maps, heavy sand measurement result maps and/or remote sensing result maps.
3. The method for rapidly delineating a target zone of gold prospecting according to claim 1, wherein the ore formation system in step (2) comprises an extension structure ore formation system, a pressing structure ore formation system, a sliding structure ore formation system, a heave structure ore formation system, a sedimentation structure ore formation system, a large-scale toughness shearing ore formation system and/or a meteoritic structure ore formation system;
the mineralization system comprises a magma mineralization system, a hydrothermal mineralization system, a deposition mineralization system, a biological mineralization system and/or a modified mineralization system.
4. The method for rapidly delineating a gold exploration target area according to claim 1, wherein said collecting samples in step (3) comprises collecting a chronology sample on the roof of said typical deposit, and then uniformly collecting rock geochemical samples around said chronology sample and performing a test analysis;
the test comprises the steps of taking the chemical sample to carry out main element analysis, rare earth element analysis, trace element analysis, sulfur isotope analysis and lead isotope analysis; and (3) taking the year-measuring sample to perform zircon LA-ICP-MS (LA-inductively coupled plasma-mass spectrometry) year-measuring analysis and 40Ar-39Ar isotope year-measuring analysis.
5. The method for rapidly delineating a target zone in gold exploration according to claim 1, wherein said series of anomalies in step (4) comprises geochemical anomalies, geophysical anomalies, remote sensing anomalies, and/or heavy sand anomalies;
the mineralizing effect comprises a stratum-tectonic-magmatic effect and/or a deep shell mantle effect.
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| CN117216576B (en) * | 2023-10-26 | 2024-03-29 | 山东省地质矿产勘查开发局第六地质大队(山东省第六地质矿产勘查院) | Graphite gold ore prospecting method based on Gaussian mixture clustering analysis |
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