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Method for extracting porphyry copper typical altered zone mineral information based on ASTER satellite data

A technology for satellite data and information extraction, which is applied in the fields of electrical digital data processing, special data processing applications, instruments, etc., and can solve the problem of not running on orbit

Inactive Publication Date: 2012-04-25
CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
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Problems solved by technology

The identification of minerals with hyperspectral data can achieve quantitative identification of single minerals or mineral combinations. However, there is currently no data source suitable for mineral alteration related to geological and mineral resources in orbit; the information extraction of altered minerals at this stage is carried out in TM / ETM+ and ASTER data are the data sources. The former has relatively mature methods for extracting iron staining and hydroxyl anomaly information. ASTER data contains 3 visible light (0.52-0.86um), 6 short-wave infrared (1.60-2.43um) and 5 thermal Infrared (8.125-11.65um) has a total of 14 bands, which can extract more subtle alteration minerals and combination information. Relevant experts at home and abroad have carried out a large number of targeted research and applications. At present, the main research and construction include Fe 3+ Ions, Al-OH groups, CO 3 2 Method for Extracting Mineral-like Information of Ion Groups and Mg-OH Groups
However, there is no technical method for extracting information about typical alteration zones of a specific metallogenic type

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  • Method for extracting porphyry copper typical altered zone mineral information based on ASTER satellite data
  • Method for extracting porphyry copper typical altered zone mineral information based on ASTER satellite data
  • Method for extracting porphyry copper typical altered zone mineral information based on ASTER satellite data

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Embodiment Construction

[0050] In order to better illustrate the method for extracting the mineral assemblage information of porphyry copper ore mudification-phyllite-like alteration zone based on ASTER satellite data involved in the present invention, it was carried out in Ali Paki, a porphyry copper ore concentration area in southern Peru Test, the specific steps are as follows:

[0051] The first step is to read in the ASTER data (ID: ASTL1A 0607271504480607300378) to make data sets from B1 to B9;

[0052] The second step, data quality analysis and control, uses B2, B3, B1 (RGB) false color cooperation, and checks B4 to B9 at the same time, and finds that the data quality is good;

[0053] The third step is data preprocessing,

[0054] (1) Use Crosstalk 3.0 software to eliminate crosstalk effects;

[0055] (2) Use the FLAASH atmospheric correction model to perform atmospheric correction on the ASTER data;

[0056] (3) Removal of interfering surface feature information, using B3, B6 and B7 logic...

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Abstract

The invention relates to a method for extracting porphyry copper typical altered zone mineral information based on ASTER satellite data, in particular to a method for extracting argillization and phyllite-like altered zone mineral combined information. The method comprises the following steps of: firstly, reading in ASTER data; secondly, analyzing and controlling data quality; thirdly, pre-processing the data; fourthly, constructing a 4-waveband (B1, B4, B6 and B7) main component analysis model to acquire a feature vector matrix; and fifthly, analyzing a feature vector to determine a main component where the mineral information is positioned. The method is concise, practical and strong in operability and can be used for extracting copper typical altered zone argillization and phyllite-like altered zone mineral combined information in a semiquantitative way. In addition, the used ASTER satellite data covers over 90 percent of global land, have popularization and application values for global porphyry copper ore metallogenic belts (zones), and can be used for providing important direct indication information for searching the mineral products.

Description

technical field [0001] The invention relates to a method for extracting mineral information of a typical alteration zone of porphyry copper based on ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) satellite data, in particular to a method based on ASTER satellite data The mineral assemblage information extraction method of argillaceous-phyllite-like alteration zones in porphyry copper deposits belongs to remote sensing geological technology and is suitable for semi-quantitative identification of argillaceous-phyllite-like alteration zones in typical alteration zones of porphyry copper deposits using ASTER satellite data. Mineral assemblages of enicitized alteration zones. Background technique [0002] ASTER satellite data is multispectral data between traditional TM (Thematic Mapper) / ETM+ (Enhanced Thematic Mapper Plus, enhanced Thematic Mapper Plus) and other multispectral data and hyperspectral data. There are also foreign countries Experts call thi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 杨日红李志忠
Owner CHINA AERO GEOPHYSICAL SURVEY & REMOTE SENSING CENT FOR LAND & RESOURCES
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