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位于藏北羌塘中部的冈玛日 -桃形错地区首次发现含典型蓝闪石的蓝片岩。蓝片岩是由蓝闪石、铁蓝闪石、青铝闪石、多硅白云母、阳起石、黝帘石、绿帘石、方解石、榍石、金红石等矿物组成 ,变质温压条件为 40 0℃±和 7kbar± ,属于高压变质作用。这是一条高压变质带 ,推测它可能向东与滇西的澜沧江高压变质带相连。冈玛日 -桃形错地区含典型蓝闪石的蓝片岩的发现对羌塘陆块的重新认识以及冈瓦纳大陆与劳亚大陆的板块边界及晚古生代古特提斯洋的闭合 ,具有重要的大地构造意义
For the first time, the blue schist that contains typical glaucophane is found in the Gangmari-Peach-erratic region located in the central part of northern Qiangtang in northern Tibet. Blue schist is composed of glaucophane, iron blue amphibole, aluminum aluminum amphibole, polycrystalline muscovite, actinolite, zoisite, epidote, calcite, stone, rutile and other minerals, metamorphic conditions of temperature and pressure 40 0 ℃ ± and 7kbar ±, belong to the high-pressure metamorphism. This is a high-pressure metamorphic belt, suggesting that it may be connected eastward with the Lancangjiang high-pressure metamorphic belt in western Yunnan. Discoveries of the Qiangtang block and discovery of the Gondwana-Lao-Eurasian plate boundaries and the closure of the Late Paleo-Palaeo-Tethys Ocean have revealed Important tectonic significance