Method and device for extracting remote sensing information of mineralized alteration

Abstract

The invention provides a mineralized alteration remote sensing information extraction method and device. The method comprises the following steps: first, obtaining remote sensing image data and usingmask technology to process and form basic data; 2, performing histogram calculation on that basic data in a selected area to determine the modeling data, extract abnormal information from the modelingdata by adopting the principal component analysis method, and sequentially cutting and verify the abnormal information by using a normal distribution method and a multiple linear regression method; Thirdly, according to the eigenvector algorithm extracted from the abnormal information, the eigenvector satisfying the check being obtained and mapped to the new abnormal information extracted in a large range as an extracting parameter, and then the new abnormal information is cut and output. This method can realize the striding alteration remote sensing anomaly extraction in different landscapeareas, which is beneficial to the quicker and more accurate selection of prospecting target areas, and can save time and manpower and material resources for mineral resources investigation.

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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