Geodynamics of the inner and outer Zagros Ophiolite belt (Iran), inferred from the chemical composition of Cr-spinel in chromitites

摘要：

　　The composition of chromian spinel in chromitites and their host peridotites from the Neyriz and Nain ophiolites in the Zagros ophiolite belt shows that there are remarkable compositional variations between these two ophiolites.The Nain ophiolite in the NW is dominated by harzburgite with limited and small-size chromitite pods, whereas the Neyriz ophiolite to the SW contains both harzburgite and dunite with a large potential for high-Cr chromitites.The Neyriz chromitites in the southern sectors (outer Zagros) are the product of typical fore-arc-related boninitic melts, whereas the Nain chromitites of the inner Zagros probably originated in a back-arc basin from island arc tholeiite and MORB-like magmas.

关键词： Mineral chemistry Cr-spinel ophiolites of Iran back-arc basin fore-arc basin

作者: Fatemeh Sepidbar Hassan Mirnejad

作者单位: Department of Geology, University of Tehran, Tehran, Iran

会议类型: 国际会议

会议名称: International Workshop on Tethyan Orogenesis and Metallogeny in Asia and Cooperation among Institutions of Higher Education(2014年亚洲特提斯造山与成矿国际学术研讨会暨高等教育合作会议)

会议地点: 武汉

会议语种:英文

页码: 69-72

在线出版日期: 2014-10-11（万方平台首次上网日期，不代表论文的发表时间）