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中文摘要：
展金组由梁定益等于日土县多玛区吉普村北展金河命名,本文研究的展金组位于藏北羌塘中央隆起带,前人称之为＂浅变质岩系＂,其时代、形成环境、构造属性等存在较大争议。笔者以展金组出露最为典型的地区——青藏高原羌塘南部冈玛错地区为研究区,对展金组进行详细的剖面测制、碎屑锆石的U-Pb定年。结果表明,展金组为晚石炭世—早二叠世冈瓦纳大陆不规律的冰川作用于冈瓦纳大陆北缘古特提斯洋大洋盆地的产物,在冈玛错地区可识别出三期较大的冰川运动;展金组的物源为自泛非运动以来一直处于稳定的冈瓦纳大陆,其所处羌南-保山板块为冈瓦纳大陆的一部分。该项研究为探讨冈瓦纳大陆北缘的沉积环境提供了依据。
英文摘要：
Zhanjin Formation was named by Liang Dingyi at Zhanjin river,north of Jipu village,Duoma area,Ritu county.This paper showed Zhanjin Formation is located in the central uplift belt of Qiangtang,which was called＂shallow metamorphic rocks＂,whose age,forming environment and tectonic property have been considerable controversy.We measured profiles and dated the detrital zircon using U-Pb method for Zhanjin Formation at Gangma Co area,Southern Qiangtang,Tibetean Plateau,where was the most typical exposed area for Zhanjin Formation.The results show Zhanjin Formation was the irregular Gondwana glaciation acting on the Paleo-Tethys ocean basin in the north of Gandwana continent;At Gangma Co area,We identify three larger glaciers;the material source of Zhanjin Formation was the steady Gondwana continent after the Pan-African movement and the Southern Qitang-Baoshan Plate was a part of Gondwana continent.These studies afford evidences for the depositional environment in the northern margin of Gondwana continent.
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