论西天山乌拉斯泰地区的构造演化

Discussion on Tectonic Evolution in Wulasitai Area,Western Tianshan

通过对乌拉斯泰地区的沉积相、侵入岩及火山岩的构造环境分析,结合前人成果认为,该地区经历了古准噶尔洋的形成和发展、乌拉斯泰泥盆纪裂陷槽的形成和发展、晚古北天山有限洋(陆表海)的形成和发展以及陆内造山及隆升4个阶段,乌拉斯泰泥盆纪裂陷槽的确立,修正了西天山造山带的构造区划及演化史。

By the tectonic environment analysis of sedimentary facies, granite and volcano rock in Wulasitai area, combining with past result to think, that region experienced 4 stages of the formation and development： the early Paleozoic Zhunga＇er Ocean, the Devonian Wulasitai rift basin, the late Paleozoic North Tianshan Ocean, and the stage of intracontinental orogeny and uplifting. After Wulasitai rift basin was confirmed, the tectonic division and evolving history of Western Tianshan orogenic belts will be revised.