桂林理工大学学报2018，Vol.38Issue(4)：614-624,11.DOI:10.3969/j.issn.1674-9057.2018.04.002
幕阜山地区新元古代花岗岩地球化学特征及成因探讨
Geochemical characteristics and genesis of the Neoproterozoic granite in Mufushan area
摘要
Abstract
The Mufushan area in the middle part of the Jiangnan Orogen,which is located at the junction of Hunan, Hubei and Jiangxi,is an important rare metal ore concentration area in China. The Neoproterozoic Sandun granite in the southern part of Mufushan area is mainly composed of weakly-gneissic medium-fine grained twomica plagioclase granite. Whole rock geochemical analysis of samples show that Sandun Granite belongs to peraluminous calc alkaline granite and is characterized by high Na,Al,and LILE contents,low Eu and Nb,with A/CNK =1. 15 - 1. 39,A/NK =1. 39 -1. 69,ΣREE =70. 45 ×10 - 6 -84. 36 ×10 - 6,LaN /YbN = 10. 82 - 11. 23. Geochemical features and diagrams of the granite samples show similarity to I-type granite,and indicate that the Sandun granite was formed under a tectonic setting of continental island arc. Taking into account the regional geology,we consider that the Neoproterozoic granite in Mufushan area was formed by plate collision of Grenville orogeny during the formation of Jiangnan Orogen,and is the product of magmatism for the converging plate marginal subduction zone.关键词
花岗岩/地球化学/新元古代/幕阜山/江南造山带Key words
granite/geochemistry/Neoproterozoic/Mufushan/Jiangnan Orogen!分类
天文与地球科学引用本文复制引用
黄志飚,李鹏,周芳春,刘翔,李建康,肖国强,张立平,陈虎,汪宣民..幕阜山地区新元古代花岗岩地球化学特征及成因探讨[J].桂林理工大学学报,2018,38(4):614-624,11.基金项目
中国地质调查局项目(DD20160056) （DD20160056）
湖南省核工业地质局科研项目(KY2016-311-01) （KY2016-311-01）
湖南省国土资源厅科研项目(2018-02) （2018-02）
