%0 Journal Article
%T SHRIMP dating of the Bangong Lake SSZ-type ophiolite: Constraints on the closure time of ocean in the Bangong Lake-Nujiang River, northwestern Tibet<br>Age of Bangong Lake SSZ ophiolite constraints the time of the Bangong Lake－Nujiang Neo-Tethys
%A SHI Rendeng
%A <br>SHI
%A RenDeng
%J 科学通报(英文版)
%D 2007
%I 
%X 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. Supported by the Ministry of Land and Resources (Grant No. 20010101) and the National Natural Science Foundation of China (Grant No. 40572036 and 40610104005)
%K SSZ-type ophiolite
%K gabbro
%K zircon
%K SHRIMP
%K Bangong Lake
%K Tibet<br>西藏
%K 班公湖怒江缝合带
%K 古海洋闭合时期
%K SSZ型蛇绿岩
%K SHRIMP
%K 测年
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=A4487A7E1534DB830164BFB636F8EFB7&yid=A732AF04DDA03BB3&vid=286FB2D22CF8D013&iid=DF92D298D3FF1E6E&sid=66973F362693F62B&eid=27A5865B8C0B85C3&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=2&reference_num=31