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沿噶尔河—雅鲁藏布江及其北岸的冈底斯山系分布着巨大的弧形花岗质岩基,向东延伸到波密、察隅地区,其范围东西长达两千余公里、南北宽几十公里到百余公里。岩带位置与印度板块和欧亚大陆板块之间的缝合线方向一致。根据迪肖和甘塞尔报道,该岩带向西经克什米尔地区延伸到巴基斯坦境内。现有资料证明,冈底斯花岗质岩基是多期多阶段强烈的中酸性岩浆侵入作用形成的,主体部分出露在雅鲁藏布江以北,江南也有
Along the Junggar-Brahmaputra and its north bank, there are huge arc-shaped granitic rock formations in the Gangdise Mountains extending eastwards to Bomi and Chayam areas, covering a range of over 2,000 km in east and west and several in north-south Ten kilometers to hundreds of kilometers. The location of the rock zone coincides with the direction of the suture between the Indian and Eurasian plates. According to Disha and Ghanser, the belt extends westward across Kashmir to Pakistani territory. The available data show that the Gangdese granite is a multi-stage multi-stage intense magmatic intrusive formation, the main part of the exposed north of the Yarlung Zangbo River, Jiangnan also has