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位于金沙江以西的西藏江达地区,三叠纪火山岩十分发育。很多研究者曾经指出, 它们具有弧火山岩的特点,喷发于岛弧或陆缘弧的构造环境。经过作者近几年的工作,不仅确认了前人这种看法的正确性,而且进一步发现在江达地区存在一个比较完整的古海沟-火山弧-弧后盆地体系。这一发现为识别“三江”地区在地质构造发展中起着重要作用
Located in the western part of Jinsha River in Jiangxi Jiangda area, Triassic volcanic rock is well developed. Many researchers have pointed out that they have the characteristics of arc volcanic rocks erupted in the island arc or continental arc tectonic environment. After the author’s work in recent years, not only confirms the correctness of the predecessors, but also finds that there is a relatively complete system of ancient sea trench-volcanic arc-backarc basin in Jiangda area. This finding has played an important role in identifying the development of geological structure in the “Sanjiang” area