利用ETM 遥感技术进行尾亚杂岩体的岩性识别

地处新疆东天山地处荒漠戈壁区的尾亚椭园形杂岩体,在构造上位于卡瓦布拉克微地块中部几个大构造线交切处的构造软弱部位,面积167.40km2,其中外环面积77.28km2,内环面积90.12km2.其近等轴状形态和多期次侵入的复杂岩性,对研究该区构造-岩浆活动具有重要意义,引起众多学者的注目.长期以来,岩性提取一直是遥感地质工作者希望攻克的难题之一.通过利用多光谱遥感技术对于这样一个面积较大,岩石裸露,岩相复杂的杂岩体进行岩性识别.不仅可以对前人的工作进行补充与完善,为岩浆活动、岩石学、区域构造研究提供新的证据,将遥感岩性识别信息用于尾亚杂岩体的形成、演化机制的探讨,扩大了多光谱遥感技术在地质中的应用领域.

Lithology identification of the Weiya complex by means of ETM remote sensing

Located in a gobi zone of the East Tianshan,Xinjiang,the Weiya elliptic complex is tectonically situated in a zone of tectonic weakness at the intersection site of several large lineaments in the central part of the Kawabulak microblock.The area of the Weiya complex is 167.40 km~2,of which the area of the outer ring is 77.28 km~2 and the area of the inner ring is 90.12 km~2.It is important for studying the tectonomagmatic activities in the area because of its nearly equiaxial shape and multiple intrusion;so it has caused close attention of numerous researchers.For a long time,the extraction of lithology information using remote sensing has been one of the technological problems for remote sensing geologists.Lithology identification using multispectral remote sensing in such a large complex where rocks are exposed and lithofacies is complicated can not only supplement and improve the work of previous researchers,but also provide new evidence for the study of magmatie activities,petrology and regional tectonics.The use of this technique for the study of the formation and evolution mechanism of the Weiya complex enlarges the application of the muhispectral remote sensing technique in geology.