叶亦克幅、黑石北湖幅地质调查新成果及主要进展

New results and major progress in regional geological survey of the Yeyik and Heishi North Lake sheets

发现了3条蛇绿混杂岩带,并以此对本区的构造地层单元进行了合理的划分。在碎石山、拜惹布错一带发现了较为典型的蛇绿混杂岩,从而为西金乌兰-金沙江结合带的西延提供了有力的佐证。认为库牙克断裂与阿尔金断裂为同一条断裂,并首次提出库牙克断裂的断距约80km。在原侏罗系雁石坪群中发现了大量二叠纪化石,为地层的正确划分提供了依据。

Three ophiolitic mélange belts have been found, and on that basis tectono-stratigraphic units in the area have been defined. The discovery of relatively typical ophiolitic mélanges in the vicinity of Bairebucuo-Suishishan provides strong evidence for the westward extension of the Xijir Ulan-Jinsha River junction zone. It is thought that the Kuyak fault and the Altyn Tagh fault belong to the same fault, and it is first proposed that the displacement of the Kuyak fault is about 80 km. Large numbers of Permian fossils are found in the original Jurassic Yanshiping Group, which provides a basis for the correct stratigraphic division.