青藏大陆北缘盆山耦合带库斯拉甫地区遥感蚀变信息提取

doi:10.6046/gtzyyg.2014.01.22

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摘要

新疆库斯拉甫地处青藏大陆北缘西昆仑复合造山带与塔里木大陆南缘的碰撞结合带，具备良好的成矿地质条件；但自然环境恶劣，可进入条件差，有不少重要地质现象和找矿信息若采用常规地质调查方法难以获取。许多应用实践已经证明，日趋成熟的遥感技术能够很好地弥补这方面的不足。以库斯拉甫地区为研究区，以ETM⁺图像为数据源，在ENVI软件环境下，综合运用比值运算、掩模处理、主成分分析和密度分割等方法对遥感数据进行处理，提取出研究区近矿围岩蚀变信息；并通过与研究区已有矿点信息和化探异常信息进行叠置分析，对提取的遥感蚀变信息进行验证。结果表明，利用上述方法提取羟基蚀变信息是可行的，可为研究区今后开展大范围地质找矿提供依据。

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关键词 ：资源三号卫星（ZY-3）, 多光谱, 图像质量, 灰度特征, 纹理特征, 地理要素视觉特征

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.

Key words： ZY-3 multi-spectral image quality grey scale characteristics texture characteristics visual characteristics of geographic element

收稿日期: 2013-02-10 出版日期: 2014-01-08

TP79

基金资助:

新疆阿克陶县库斯拉甫一带1：5万区域地质矿产调查项目（编号：XJZBKD2007-1）资助。

作者简介: 夏清（1980-），女，博士研究生，讲师，主要从事遥感与地理信息系统研究。Email：xiaqing@swust.edu.cn。

引用本文:

夏清, 杨武年, 赵妮. 青藏大陆北缘盆山耦合带库斯拉甫地区遥感蚀变信息提取[J]. 国土资源遥感, 2014, 26(1): 127-131.
XIA Qing, YANG Wunian, ZHAO Ni. Extraction of remote sensing alteration information of Kosrap area in northern basin-mountain coupling zone of Tibetan Plateau. REMOTE SENSING FOR LAND & RESOURCES, 2014, 26(1): 127-131.

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https://www.gtzyyg.com/CN/10.6046/gtzyyg.2014.01.22 或 https://www.gtzyyg.com/CN/Y2014/V26/I1/127

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