Lithological Research on the Purang Mantle Peridotite in Western Yarlung-Zangbo Suture Zone in Tibet
详细信息
- 责任者：Xu Xiangzhen (State Key Laboratory of Continental Tectonics and Dynamics ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Yang Jingsui
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(11)
- 关键词：橄榄岩 ; peridotites ; 蛇绿岩 ; ophiolite ; 雅鲁藏布江 ; Yarlung Zangbo River
- 页码：p.3179-3196
- 图表：12 illus., 5 tables, 66 refs.
- 分类号：0801
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
The Purang ophiolite in the Yarlung-Zangbo suture zone in Tibet is characterized by containing a large mantle peridotite massif of ca. 600 km2 in area. The mantle peridotite consists of dominant harzburgite, minor lherzolite and dunite, and contains some dikes or veins of olive clinopyroxenite, gabbro and diabase in the massif. The features of ophiolite imply a depleted mantle source, which were overlapped by fluid alteration in a subduction zone. It concludes that the Purang ophiolite formed in a MOR setting and was modified by fluids in a SSZ setting, similar to the Luobusa ophiolite in the eastern Yarlung-Zangbo suture zone.