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前言本文系在1980—81年作者参加地质部高原地质调查工作基础上进行论述的。研究范围包括楔入川、甘、青、藏四省之间的大三角区和藏东的昌都地区、川西的金沙江地区。前者属昆仑、巴颜喀拉—松潘、甘孜褶皱系,后者属横断山—三江褶皱系。位于我国西部这一中生代褶皱区,为国内、外研究古特提斯构造域众所瞩目之地。近年,陆续在金沙江带, 甘孜—理塘带发现蛇绿混杂堆积及其有关的深水相放射虫硅质岩;岩石学资料提供,金沙江西侧存在着一个演化系列完整的古火山岛弧。说明本区晚古生代—三叠纪曾经有过洋壳的存在。本文认为,这个大洋就是二叠纪—三叠纪那个古特提斯大洋的一部分;以其主体在昆仑—巴颜喀拉山一带,故命名为昆仑—巴颜喀拉海。
Preface This article is based on the 1980-81 authors’ participation in the Geological Survey of Plateau Geology. The scope of the study includes wedging the Greater Triangle region between Sichuan, Gansu, Qinghai and Tibet and the Qamdo region in eastern Tibet and the Jinshajiang region in western Sichuan. The former belongs to Kunlun, Bayan Har-Songpan and Ganzi folds, and the latter belongs to Hengduan Mountains-Sanjiang folds. Located in the Mesozoic fold zone in western China, it is the focus of the study of the ancient Tethyan tectonics at home and abroad. In recent years, one after another in the Jinsha River, Garze - Litang belt found mixed ophiolite green and its related to the deep-water phase radioactive insects chert; petrological data provided, there is an evolutionary series of ancient volcanic island arc west of the arc. This shows that the area had Late Paleozoic - Triassic there had been the existence of oceanic crust. This paper argues that this ocean is part of the Permian-Triassic ocean of the ancient Tethys. With its main body in the Kunlun-Bayan Har Mountains, it is named Kunlun-Bayan Harhai.