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通过野外地质填图,小龙河矿田可区分出同岩浆构造,以及相应的矿化蚀变。小龙河矿田同岩浆断裂有以下特征:(1)空间展布特征:小龙河锡多金属矿床属青藏滇缅印尼歹字型构造。歹字型构造在燕山和喜马拉雅期最为活跃,导致青藏高原整体隆起,岩浆活动,和与之相关的内生金属矿产的形成。(2)岩性特征:小龙河的含锡花岗岩可能为黑云二长花岗岩和含斑二云花岗岩。它们大多经过强
Through the field geological mapping, the Xiaolonghe orefield can distinguish the same magmatic structure and the corresponding mineralization alteration. The Xiaolonghe ore field is characterized by the same magmatic faults as the following: (1) Spatial distribution characteristics: the Xiaolonghe tin-polymetallic deposit belongs to the Tibetan-Burma Indonesia-type structure. The zigzag structures are most active in the Yanshan and Himalayan periods, leading to the overall uplift of the Tibetan Plateau, magmatic activities and the formation of endogenous metallogenic minerals associated with them. (2) Lithologic features: The tin-bearing granite in the Xiaolonghe may be biotite monzogranite and plagioclase cloud. Most of them are strong