中文摘要：

班贡·莱克 ophiolite 位于 BangongLake-Nujiang 河缝术地区的最西的部分。由橄榄岩， pillowed 和巨大的熔岩和 mafic 女同性恋的众多的单个块组成， SSZ 类型 ophiolitic geochemicalaffinity 在一个威尔森圆的结束形成了是构造混合物的。从一 gabbroic 女同性恋(样品 01Y-155 )的 co-magmatic 锆石领域的虾 U-Pb 年龄与 167.0 ±1 .4 妈的一般水准从 162.5+8.6 妈 到 177.1 ±1 .4 妈( n = 12 ， MSWD = 1.2 )，建议 Bangong LakeNeo-Tethyan 海洋的 subduction 在中间的侏罗记前开始了。从传播到 Neo-Tethyan 海洋的 subduction 的构造变换在 theBangong 湖区域在中间的侏罗记前开始了，这被推断。

英文摘要：

The Bangong Lake ophiolite is located in the westernmost part of the Bangong Lake-Nujiang River suture zone. It is a tectonic mélange consisting of numerous individual blocks of peridotite, pillowed and massive lavas and mafic dykes with SSZ-type ophiolitic geochemical affinity formed at the end of a Wilson circle. The SHRIMP U-Pb ages of the co-magmatic zircon domains from one gabbroic dyke （Sample 01Y-155） range from 162.5±8.6 Ma to 177.1±1.4 Ma with an average of 167.0±1.4 Ma （n = 12, MSWD = 1.2）, suggesting that the subduction of the Bangong Lake Neo-Tethyan Ocean started before the Middle Jurassic. It is inferred that the tectonic transform from spreading to subduction of the Neo-Tethyan Ocean began before the Middle Jurassic in the Bangong Lake area.