攀枝花米易地区白马含矿岩体岩石学特征  

Petrographic characteristics of Baima ore-bearing pluton from Miyi area,Panzhihua city

作　　者：殷桂芹 陈友良[2,3] 郭涛 郭彦宏 欧何琼 YIN Guiqin;CHEN Youliang;GUO Tao;GUO Yanhong;OU Heqiong(College of Earth Sciences,Chengdu University of Technology,Chengdu 610059,Sichuan,China;Key Laboratory of Applied Nuclear Techniques in Geosciences,Sichuan,Chengdu 610059,Sichuan,China;Panzhihua Vanadio-Titano Magnetite Deposit—Field Base of Panzhihua,Panzhihua 617000,Sichuan,China;No.208 Geological Party of Nuclear Industry,Baotou 014000,Neimeng,China)

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]成都理工大学地学与核技术四川省重点实验室,四川成都610059 [3]攀枝花钒钛磁铁矿四川攀枝花野外基地,四川攀枝花617000 [4]核工业二○八大队,内蒙包头014000

出　　处：《四川冶金》2021年第2期14-19,27,共7页Sichuan Metallurgy

基　　金：攀枝花市自然资源和规划局科研项目"国土资源部野外科学观测研究基地-白马铁矿典型地质观察剖面实测"(项目编号为201803)。

摘　　要：文章以白马铁矿及及坪矿段为研究对象,在野外详细调查和系统取样进行岩矿鉴定的基础上,对白马含矿岩体的岩石组合特征、各类岩石的矿物组合特征进行了系统的总结。结果表明:白马岩体的主体岩性为层状辉长岩类,岩石类型主要为角闪辉长岩、橄榄辉长岩和伟晶状辉长岩,矿石类型主要为橄榄辉长岩矿石及辉石橄长岩矿石,各类岩石的造岩矿物组合基本一致,均为一套“斜长石辉石橄榄石”的组合。从造岩矿物橄榄石和角闪石的两种不同结构状态来看,矿区岩浆在成矿作用过程中最少具有两次岩浆的叠加和补给作用,使形成橄榄石和角闪石的岩浆具有重复结晶的现象。Taking Jijiping ore segment in Baima iron ore as the research object,this article systematically summarizes the rock association characteristics and mineral assemblage characteristics of Baima ore-bearing pluton on the bases of the detailed field-survey and systematic sampling.The results indicate that the main lithology of Baima ore-bearing pluton is the stratiform gabbro,the main rock types are bojite,olivine gabbro and pegmatite gabbro,and the main ore types are olivine gabbro ore and pyroxene troctolite ore.The rock-forming mineral assemblages of all kinds of rocks are basically the same basically,all of them consist of"plagioclase+pyroxene+olivine".According to the two different structural states of rock-forming minerals olivine and hornblende,the magma in the mining area has at least two superposition and recharge during the metallogenic process,so that the magma forming olivine and hornblende have the phenomenon of repeated crystallization.

关 键 词：白马含矿岩体 岩石组合特征 矿物组合特征 

分 类 号：P583[天文地球—岩石学]