Diamonds Recovered from Peridotite of the Purang Ophiolite in the Yarlung-Zangbo Suture of Tibet
详细信息
- 责任者：Yang Jingsui (State Key Laboratory of Continental Tectonics and Dynamics ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Xu Xiangzhen
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(11)
- 关键词：金刚石矿 ; diamond deposit ; 橄榄岩 ; peridotites ; 蛇绿岩 ; ophiolite ; 雅鲁藏布江 ; Yarlung Zangbo River
- 页码：p.3171-3178
- 图表：4 illus., 37 refs.
- 分类号：1002
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
In this paper, the authors report the discovery of a similar collection of minerals in mantle peridotites of the Purang ophiolite, which lies in the westernmost part of the Yarlung-Zangbo suture, more than 1 000 km from the Luobusa massif. The Purang ophiolite consists mainly of harzburgite, lherzolite and dunite, probably of MOR type, which were modified in a SSZ environment. Based on the presence of similar minerals in the Ray-Iz ophiolite of the Polar Urals, and reports of diamonds in Alpine-type mantle peridotites, the authors suggest that diamonds and highly reduced minerals may be common in ophiolitic peridotites. These occurrences indicate a completely new environment for diamond formation.