新疆东准噶尔锡金矿产遥感调查

本文介绍了采用彩色红外航空像片和多种航天遥感资料,运用计算机和光学图像处理技术并结合地质资料进行的多源遥感信息对比分析、线性构造判读、主要含矿地质单元遥感影像特征及其机理分析等,以及据此建立的一套适于该区遥感找矿的工作方法。应用该方法圈定的遥感影像异常区,经野外验证,发现两处锡矿和一处金矿靶区,取得了良好的遥感找矿效果。

Remote Sensing for Minerals Exploration of Tin and Gold in East Zhungeer Area Xinjiang, China

The paper discusses the application of airborne and spaceborne remote sensing data which are optically and digitally processed to analyse the features of the mineralized geological units on imagery and its mechanism, and also to identify and determine the anomalous area of possibly mineralized geological bodies on imagery. It is discovered that one group of linerments interpreted from image existing in acid alkali-granites in arid area in the western China controls mineralization and contains mineral zones, especially on the airborne color infrared photograph they have excellent exposure. In the meanwhile, the greisen veins were interpreted from photograph, which are the good indications of tin deposit. In 1987, two tin deposit were discoverred during two months field investigation. In the surveying areas, it is found that in the densely intermittent linear image feature zone and in the altered rocks in NE 80?direction exists a outer contact zone between granites and Devonian system marine volcanic-sedimentary clastic rocks, which was regarded as the favourable place for activating and re-enriching gold element in gold-bearing strata by structural and magmatic movement. In August 1988, a gold deposit of structural fractured crevice altered rocks was found in the remote sensing field investigation. It is a valuable achievement of remote sensing technology. The avove examples show that remote sensing technology can rapidly undertake geological investigation and mineral exploration over large area and gain better economic results with very limited data in geologic working area difficult of conditions.