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Hyperspectral fine mapping method for hydrothermal altered minerals

A technology for hydrothermal alteration and altered minerals, which is applied in the field of natural resource remote sensing investigation, can solve the problems of difficult and fine distinction of altered minerals, and achieve the effect of reducing the false extraction rate.

Pending Publication Date: 2022-04-12
BEIJING RES INST OF URANIUM GEOLOGY
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  • Abstract
  • Description
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Problems solved by technology

This method treats all wave bands equally. In fact, altered minerals have characteristic spectral bands and have obvious absorption and reflection values ​​in the characteristic spectral bands. Therefore, this method is suitable for altered minerals with similar overall spectral shapes that have slight differences in absorption positions. hard to distinguish

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  • Hyperspectral fine mapping method for hydrothermal altered minerals
  • Hyperspectral fine mapping method for hydrothermal altered minerals

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "centre", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. indicate The orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred de...

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Abstract

The invention belongs to the technical field of natural resource remote sensing survey, and particularly relates to a hyperspectral fine mapping method for hydrothermal altered minerals. The method comprises the following steps: step 1, preprocessing hyperspectral data; step 2, carrying out dimension reduction and re-grouping on the hyperspectral data; 3, performing factor decomposition on the spectrum sampling interval of the hyperspectral data; step 4, hyperspectral data spectrum value-added processing in a band-by-band interval is carried out; 5, removing a hyperspectral data envelope line; step 6, determining an altered mineral image end member spectrum; and 7, performing fine mapping on the altered minerals according to the hyperspectral data. According to the method, mineral subclasses are better distinguished and recognized through spectrum value-added treatment and spectrum shape-peak position cooperative spectrum matching treatment.

Description

technical field [0001] The invention belongs to the technical field of remote sensing investigation of natural resources, and in particular relates to a hyperspectral fine mapping method for hydrothermally altered minerals. Background technique [0002] Mineral resources important to the national economy such as uranium, gold, and copper generally develop hydrothermal alteration zones that are much larger than the ore body area, and a large number of altered minerals such as hematite and illite develop in the alteration zone. The short-wave infrared spectrum has strong spectral activity and obvious spectral absorption characteristics, so it can be detected and identified by hyperspectral remote sensing technology, and then provide important remote sensing criteria for the selection of prospecting areas. At present, regardless of satellite hyperspectral data or aerial hyperspectral data, the spectral sampling interval of the original data is better than 20nm for identifying a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35G01N21/359G01N21/55G01J3/42G01J3/427G06F17/10
Inventor 孙雨赵英俊田丰秦凯
Owner BEIJING RES INST OF URANIUM GEOLOGY
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