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CN-121995525-A - Regional ore finding method and system based on multi-element space coupling of ore forming system

CN121995525ACN 121995525 ACN121995525 ACN 121995525ACN-121995525-A

Abstract

The invention discloses a regional ore finding method and a regional ore finding system based on multi-element space coupling of an ore forming system, and belongs to the technical field of mineral resource ore finding prediction and comprehensive modeling of the ore forming system. The method comprises the steps of obtaining multi-source spatial data of a covered ore collecting area, converting and constructing the multi-source spatial data into background domain, transmission domain, ore containing domain and target domain indication spatial distribution indexes according to a process mechanism of an ore forming system, constructing comprehensive ore forming potential indexes used for representing spatial distribution patterns of regional ore forming potential, constructing uncertainty prediction indexes based on consistency deviation degree and local difference between response of the indexes of each domain, carrying out synchronous reliability quantification on comprehensive ore forming potential evaluation results, and carrying out classified screening and target area circle setting on regional ore forming abnormal units according to a combined discrimination relation of the ore forming potential indexes and the uncertainty indexes so as to realize continuous quantitative prediction of regional scale ore forming potential and optimization of an ore forming target area and provide mineral geological investigation service developed by using high technology.

Inventors

  • HU JIN
  • ZHOU JIAXI
  • LUO KAI
  • BAO GUANGPING
  • HE JIAOJIAO

Assignees

  • 玉溪师范学院
  • 云南大学

Dates

Publication Date
20260508
Application Date
20260112

Claims (10)

  1. 1. The regional ore finding method based on multi-element space coupling of the ore forming system is characterized by comprising the following steps of: (1) Acquiring multi-source space data covering a target mine area, and carrying out coordinate unification, calibration processing, noise suppression and space registration on the multi-source space data to construct a basic space data set; (2) Respectively constructing background domain indication distribution, transmission domain indication distribution, ore-holding domain indication distribution and target domain indication distribution from the basic space dataset according to a process model of a 'source-channel-reaction place-abnormal response' of the ore-forming system; (3) Carrying out normalization processing and continuous smooth transformation on the indication distribution of each domain to generate standardized index distribution which is comparable in a unified numerical value interval; (4) According to a preset multi-domain coupling fusion model, carrying out integrated operation on the index distribution of the standardized background domain, the transmission domain, the ore holding domain and the target domain to generate a comprehensive ore forming potential index field MPI of the target ore region; (5) Constructing an uncertainty index field U based on response differences and local space variations of indexes of the background field, the transmission field and the ore holding field in the same position space position; (6) And based on the joint discrimination relation of the MPI and the U, carrying out grading evaluation on the target ore region, and determining the region with high MPI and low U as a preferable ore forming target region, thereby realizing the delineation and sequencing of the ore forming target regions of the ore collecting region.
  2. 2. The method of regional mining based on multi-element spatial coupling of an ore-forming system of claim 1, wherein the multi-source spatial data comprises at least one of: remote sensing optical or hyperspectral image data, geochemical data, geophysical data, digital elevation model data, and geological logging and structural interpretation data.
  3. 3. The regional prospecting method based on multi-element spatial coupling of an ore-forming system according to claim 1, wherein the regional prospecting method is characterized in that: The background field is used for representing the mineral substance supply background and favorable stratum construction conditions; The transmission domain is used for describing the distribution of the fracture structure and the characteristics of the fluid transmission channel; The ore containing domain is used for reflecting the space conditions of the fluid-surrounding rock reaction precipitation; the target domain is used to characterize mineralization products and near-surface aberrant responses thereof.
  4. 4. A method for regional prospecting based on multi-element spatial coupling of an ore-forming system according to claim 1 or 3, wherein: The normalization processing comprises mapping each domain indication distribution to a unified standard numerical interval; The continuous smooth transformation includes enhancement or compression transformation of the index using a nonlinear continuous mapping function to suppress local noise and strengthen the mineralogical-related high response area.
  5. 5. The method according to any one of claims 1 to 4, wherein the comprehensive mineralisation potential index MPI is formed by multiplicatively coupling background domain, transmission domain and mineralisation domain indexes and introducing target domain indexes as enhancement factors, so that the comprehensive result simultaneously represents the synergistic constraint effect of the multi-domain mineralisation process.
  6. 6. The method according to any one of claims 1 to 5, wherein: the uncertainty index U is constructed by calculating response separation degrees of indexes of a background domain, a transmission domain and a mineral containing domain at the same spatial position, calculating local variance of each domain index, and carrying out weighted fusion on the response separation degrees and the local variance to obtain the uncertainty index, wherein the uncertainty index is used for representing consistency states among multi-domain mineral formation indexes and reliability of prediction results.
  7. 7. The method of claim 1 to 5, wherein the target domain index distribution comprises at least a target detection result based on a target mineral spectrum end member, and is weighted and fused with an iron oxidation abnormality index and a vegetation abnormality index.
  8. 8. Regional prospecting system based on mineral system multielement space coupling, characterized by comprising: The system comprises a data acquisition and preprocessing module, a multi-domain indication distribution construction module, an index normalization and smoothing processing module, an ore potential index calculation module, an uncertainty index calculation module and an ore target area judgment and result output module, wherein the data acquisition and preprocessing module is used for executing the step (1) of the claim 1, the multi-domain indication distribution construction module is used for executing the step (2) of the claim 1, the index normalization and smoothing processing module is used for executing the step (3) of the claim 1, the ore potential index calculation module is used for executing the step (4) of the claim 1, the uncertainty index calculation module is used for executing the step (5) of the claim 1, and the ore target area judgment and result output module is used for executing the step (6) of the claim 1.
  9. 9. The system of claim 8, further comprising a model parameter configuration and verification module for comparing the predicted target area to known deposits or outliers and adaptively modifying the fusion weights and discrimination thresholds.
  10. 10. The system according to claim 8 or 9, wherein the system is suitable for ore collection prediction of deposit type, hydrothermal type and deposit-hydrothermal superposition type cobalt ores and associated multi-metal ore deposits, and for other types of metal ore deposits, the index construction modes of the background domain, the transmission domain, the ore containing domain and the target domain are adjusted according to the ore formation system mechanism.

Description

Regional ore finding method and system based on multi-element space coupling of ore forming system Technical Field The invention relates to the technical field of mineral resource prospecting prediction and comprehensive modeling of an ore forming system, in particular to a regional prospecting method and a regional prospecting system based on multi-element spatial coupling of the ore forming system. Background Cobalt (Co) is used as an important strategic metal in the fields of new energy battery materials, aerospace alloys and high-end manufacturing, has complex deposit types and various occurrence forms, is commonly present in polymetallic deposit systems such as copper, nickel, iron and the like in a similar or associated form, has low development degree of independent cobalt-rich mineral phases, has hidden surface expression, has poor identifiability and scattered superposition characteristics on the scale of a mineral collecting area of mineralization, and brings great technical difficulty to regional prospecting prediction and fine delineating of a target area. Such deposits represented by cobalt ore generally exhibit common problems such as weak mineralization indication, high clutter and insufficient space restriction capability. The existing ore collection area ore finding prediction technology mainly relies on methods such as remote sensing spectrum experience ratio, abnormal enhancement transformation, target spectrum matching or sample classification prediction based on machine learning to carry out superposition analysis and statistical discrimination on single-factor or multi-source space information. The method mainly aims at correlation learning and experience pattern matching, focuses on extraction and expansion of abnormal characteristics, and lacks of systematic modeling and quantitative expression of causal relations among mineral substance supply background, fluid conducting channels, surrounding rock reaction precipitation environment and mineralization product space response. Under the condition of complex geological background, non-mineralized geological processes (such as carbonate deposition, weathering and iron-forming, exposure of a structural alteration zone, vegetation stress effect and the like) are easy to generate observation responses similar to mineralization anomalies, so that the problems of high response, low mineralization, abnormal concentrated erroneous judgment and the like are caused on the basis of prediction results of experience threshold values or local superposition judgment, and the stability and the interpretability of a prospecting decision are weakened. In addition, the prior art mainly uses pixel-level abnormal division or probability threshold classification, is difficult to describe continuous transmission, hierarchical structure and convergence rules of the ore forming process in space, lacks effective means for synchronously and quantitatively evaluating the confidence and uncertainty of the prediction result, and limits the application reliability of the prediction result in engineering ore finding deployment. Therefore, there is a need for a method and a system for mining that can convert multi-source observation information into multi-domain spatial indication distribution reflecting mining background, guiding conditions, reaction space and target response, and realize continuous prediction of mining potential and synchronous evaluation of uncertainty through spatial coupling and comprehensive modeling, so as to overcome the problems of insufficient spatial interpretation capability and engineering stability of the existing experience superposition type prediction technology. Disclosure of Invention In order to solve the problems, the invention provides a regional prospecting method and a regional prospecting system based on multi-element space coupling of an prospecting system, the invention takes the mineral forming processes such as mineral forming substance supply, migration and transportation guide, reaction precipitation, target response and the like as main lines, and constructs a multi-domain mineral forming indication distribution system, the multisource space observation index is converted into an ore forming process variable with physical cause constraint, and continuous quantitative prediction of ore forming potential and synchronous evaluation of prediction uncertainty are realized on the basis, so that stability, interpretability and engineering application reliability of a cobalt ore prospecting prediction result are improved. In order to achieve the above purpose, the invention provides a regional ore finding method based on multi-element space coupling of an ore forming system, which specifically comprises the following steps: S1, multi-source space data acquisition and preprocessing: the method comprises the steps of acquiring multi-source spatial data covering a target mine area, wherein the data comprises at least one or more o