科学通报（英文版）
科學通報（英文版）
과학통보（영문판）
CHINESE SCIENCE BULLETIN
2007年
7期
936-941
,共6页
SSZ-type ophiolite%gabbro%zircon%SHRIMP%Bangong Lake%Tibet
The Bangong Lake ophiolite is located in the westernmost part of the Bangong Lake-Nujiang River 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.
