Extraction of remote sensing alteration information of Kosrap area in northern basin-mountain coupling zone of Tibetan Plateau

doi:10.6046/gtzyyg.2014.01.22

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Abstract

Located in the collision juncture zone between the West Kunlun compound oroganic belt on the northern margin of Tibetan Plateau and the southern margin of Tarim Basin,Kosrap area has favorable ore-forming geological conditions and thus has aroused much attention among geologists; nevertheless, owing to its poor natural conditions and poor accessibility,it is very difficult to obtain important geological and ore-prospecting information with tranditional geological investigation methods. Practice shows that the increasingly mature remote sensing technology can well make up for the shortage. With Kosrap as the study area and ETM⁺ image as the data source, various kinds of methods, such as ratio method,data masking,principal component analysis and density segmentation, could be utilized in an integrated way in the ENVI software environment to process the data and extract the near-ore wall rock alteration information in the study area. Then the extracted remote sensing alteration information could be analyzed by stacking the existing ore spot information and geochemical anomalies in the study area. The results show that these methods are effective in obtaining hydroxy alteration information in the study area, and the results can provide the basis for further large-scale geological prospecting work in the study area.

Keywords ZY-3 multi-spectral image quality grey scale characteristics texture characteristics visual characteristics of geographic element

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Issue Date: 08 January 2014

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	LI Lin
	LUO Heng
	TANG Xinming
	LI Zhen

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LI Lin,LUO Heng,TANG Xinming, et al. Extraction of remote sensing alteration information of Kosrap area in northern basin-mountain coupling zone of Tibetan Plateau[J]. REMOTE SENSING FOR LAND & RESOURCES, 2014, 26(1): 127-131.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2014.01.22 OR https://www.gtzyyg.com/EN/Y2014/V26/I1/127

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