Geochemistry and petrogenesis of Wengen mafic-ultramafic layered intrusions, Inner Mongolia, China

摘要：

Wengen mafic-ultramafic layered intrusion locates in central part of Central Asian Orogenic Blet. The intrusion is 6 kilometers in length, and 3 kilometers in width, it is composed of leucogabbro, melagabbro, anorthosite, olivine-gabbro, gabbronotite, norite, troctolite and bojite (Fig.1). The zircon SHRIMP age of anorthosite is 285 Ma.Anorthite of plagioclase is between 72 to 84, and Mg＃ of olivine is 0.62 to 0.83. the crystallization sequence of the intrusion is Ol-(Chr)→Ol-Pl-(Chr) →Ol-Pyx-Pl→Pyx-Pl and Hbl. The rocks are enriched LREE in relative to HREE, and exhibit strong positive 5Eu anomaly (+1.43 to +2.68). Rocks are depleted in Th, Nb and relatively enriched in Ba, U, Sr, Ti.

作者: Zhou Dai Wang Qiang Su Shangguo

作者单位: Department of Geological Sciences, China University of Geosciences, Beijing 100083, China

会议类型: 国际会议

会议名称: Xian International Ni-Cu(Pt) Deposit Symposium 2009(2009 西安·Ni-Cu(Pt)岩浆矿床国际学术研讨会)

会议地点: 西安

会议语种:英文

页码: 250-250

在线出版日期: 2009-09-01（万方平台首次上网日期，不代表论文的发表时间）