津巴布韦Zvishavane铬铁矿床地质特征及矿床成因  

Geological characteristics and genesis of Zvishavane chromite deposit,Zimbabwe

作　　者：江伟华 卿芸[2] 翁继平 张元 晏增丁 

机构地区：[1]中矿资源勘探股份有限公司,北京100089 [2]中国冶金地质总局矿产资源研究院,北京100025

出　　处：《矿产勘查》2015年第6期800-805,共6页Mineral Exploration

摘　　要：津巴布韦夏瓦尼(Zvishavane)铬铁矿床位于津巴布韦大岩墙南端,拥有丰富的铬铁矿资源。文章通过对夏瓦尼铬铁矿床区域地质背景、矿区矿床地质特征及找矿标志的分析,总结了矿床成因,认为矿体一般位于每个岩浆活动旋回顶部的辉石岩中或者辉石岩与方辉橄榄岩接触部位,且平行于岩层产状分布。方辉橄榄岩、辉石岩及铬铁矿在垂向上构成多个岩相韵律,与岩浆多期次脉动式的侵入及岩浆结晶分异作用的不断进行密切相关,属典型的晚期岩浆结晶分异矿床。The Zvishavane chromite deposite is located at the southern end of the great dyke, Zimbabwe, which is abundant for chromite resources. Based on the analysis of regional geological background, geological characteristics of the deposit area and prospecting criteria, this article summarizes the genesis of Zvishavane deposit：the orebodies are generally located in the pyroxenite or the contact area between harzburgite and pyroxenite in each magmatism cycle, and it is parallel to the layering of the Great Dyke. With the multi-phase pulsating magma intrusion and magmatic crystallization and differentiation, harzburgite, pyroxenite and chromite formed several facies rhythm, Zvishanane Chromite deposit belongs one of the typical late period magmatic crystallization and differentiation deposit.

关 键 词：津巴布韦大岩墙 方辉橄榄岩 辉石岩 铬铁矿 岩浆结晶分异 

分 类 号：P618.33[天文地球—矿床学] P618.31[天文地球—地质学]