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近十几年来,对川西的区域地质调查,获得了丰富的地质资料。在前人成果的基础上,笔者对硅酸盐分析进行了系统的整理,所获认识,撰丐成文,以供参考。一、地质背景本文主要论述唐古拉花岗岩区东延部分岩体的岩石化学特征。岩体主要侵入在上三叠统义敦群、西康群和古生代地层中,受地槽发展过程的三级构造控制,可划为六个岩带。金沙江岩带(Ⅰ):分布在金沙江隆起的古生代地层中。以中性岩为主,次为酸性
In recent ten years, we have obtained rich geological data for the regional geological survey in western Sichuan. Based on the achievements of predecessors, the author systematically sorted and analyzed the silicate analysis. I. Geological Background This paper mainly discusses the petrochemical characteristics of the eastern extension part of the Tanggula granite area. The main intrusions of the rock mass are controlled by the tertiary structures of Yudun Group, Xikang Group and Paleozoic strata in the Upper Triassic, which are controlled by the tertiary structure of the terrane development and can be divided into six rock belts. Jinshajiang Belt (Ⅰ): Located in the uplifted Paleozoic strata of the Jinsha River. Mainly to neutral rocks, times for the acid