Mineralization alteration remote sensing information extraction method and device

Abstract

The present invention provides a mineralization alteration remote sensing information extraction method and device, the method comprising: the first step, acquiring remote sensing image data and using mask technology to process and form basic data; the second step, the basic data in the selected area Carry out histogram calculation and processing to determine the modeling data, then use the principal component analysis method to extract abnormal information from the modeling data, and use the normal distribution and multiple linear regression methods to cut and verify the abnormal information respectively; the third step, According to the eigenvector algorithm of abnormal information extraction, the eigenvector that satisfies the verification is obtained and used as the extraction parameter to spatially expand and map to the new abnormal information extraction in a large range, and then the new abnormal information is cut and output. This method can realize the extraction of leapfrog alteration remote sensing anomalies in different landscape areas, which is conducive to faster and more accurate selection of ore prospecting target areas, and can save time, manpower and material resources for mineral investigation work.

Description

technical field [0001] The invention relates to the field of geological exploration, in particular to a method and device for extracting mineralized alteration remote sensing information. Background technique [0002] Alteration remote sensing anomaly information is quantified and extracted from remote sensing data by mathematical means, and is used to characterize the indication information of near-mine alteration rocks that may be most related to mineralization. Alteration remote sensing anomaly information can be used as a sign of ore prospecting, has its geological and spectral basis, and has been proved and widely used in practice. [0003] The formation process of ore deposits is a gradual enrichment process of some useful elements, and this metallogenic material is usually transported and enriched by ore-forming hydrothermal fluids. The alteration of surrounding rocks near the ore is the imprint left by the process of gradual enrichment and mineralization of metallog...

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Problems solved by technology

[0005] In order to solve the problems in the prior art that weak remote sensing information of alteration cannot be identified in different landscape areas such as vegetation areas and loess-covered areas, resulting in difficulty in its extraction, the present invention provides a method for extracting mineralized alteration remote sensing information, which can Expand the spatial scale of the weak mineralized alteration remote sensing anomaly information to enhance the mineralized alteration remote sensing anomaly; and it can solve the difficulty in extracting alteration remote sensing anomalies in different landscape areas, there are many false anomalies, and a large number of remote sensing anomalies that have little to do with ore prospecting "Area-type" anomalies appear, the prospecting is not targeted and many other problems

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