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本文涉及的地区范围仅限于西藏东部金沙江以西,南起江达、同普,向北经东独,加多岭,直至青藏两省区交界处的一个狭长地带。从大地构造位置上说:它位于三江弧形构造带的东北部,金沙江复背斜的北半部。该地区的三叠系是在华力西—印支褶皱基底上发育起来的,与其下伏地层为不整合关系。沉积总厚度达万米以上,为沉积岩与火山岩的交
The scope of this article covers only a narrow strip of land extending to the west of the Jinsha River in the east of Tibet and starting from Jiangda and Tongpu in the south and heading eastwards to the east by the East and the Gadolin to the junction of the Qinghai-Tibet provinces. From the geotectonic position, it is located in the northeast of the arc structure of the Sanjiang River and in the northern half of the Jinshajiang anticline. The Triassic in the area developed on the Waris-Indosinian fold base and are not integrated with the underlying strata. Sedimentary total thickness of more than 10,000 meters for the sedimentary and volcanic rock pay