超高压榴辉岩中金红石的地球化学特征分析——以丁叉叉山钛矿为例  

Geochemical analysis of rutile in UHP eclogite: taking the Dingchachashan titanium mine as an example

作　　者：刘创脱 王丰翔 崔邢涛[1,4] 王佳 LIU Chuang-tuo;WANG Feng-xiang;CUI Xing-tao;WANG Jia(Key Laboratory of Regional Geology and Mineralization,Hebei GEO University,Shijiazhuang Hebei 050031;Inner Mongolia KeyLaboratory of Magmatic Mineralization and Ore-Prospecting,Geological Survey Institute of Inner Mongolia,Hohhot 010020;Institute of Mineral Resources,CAGS,Beijing 100037;Institute of Geophysical and Geochemical Exploration,ChineseAca de m y o f Geo logical Sciences,Langfang Hebei 065000;Qinghai Geological Survey,Xi’ning Qinghai 810000,China)

机构地区：[1]河北地质大学区域地质与成矿作用重点实验室,河北石家庄050031 [2]内蒙古自治区岩浆活动成矿与找矿重点实验室,内蒙古自治区地质调查院,内蒙古自治区呼和浩特010020 [3]中国地质科学院矿产资源研究所,北京100037 [4]中国地质科学院地球物理地球化学勘查研究所,河北廊坊065000 [5]青海省地质调查局,青海西宁810000

出　　处：《电子显微学报》2019年第6期650-656,共7页Journal of Chinese Electron Microscopy Society

基　　金：河北地质大学博士启动基金项目(No.BQ2018032)

摘　　要：丁叉叉山钛矿位于柴北缘超高压变质带内,为超大型的变质榴辉岩型钛矿床,在时空分布上与早古生代的都兰北带榴辉岩变质块体关系密切,钛主要寄宿在金红石(主要赋钛矿物)、钛铁矿和榍石之中。金红石的赋存状态有:包裹结构、粒间结构、串珠状结构、连晶结构、退变残余结构。通过金红石矿相学和矿物化学的研究,测试了不同结构金红石矿物地球化学特征,结合电子探针(EPMA)分析金红石及其主要寄宿矿物的矿物学和矿物化学特征。探讨在超高压变质条件下,与金红石成矿的主要赋存形态、矿物化学特征和成矿阶段。The Dingchachashan titanium deposit is an ultra-large metamorphic eclogite type titanium deposit,which is located in the UHPM belt in the north margin of Qaidam basin.It is closely related to the eclogite metamorphic block in the early Paleozoic dolannorth belt in terms of its spatial and temporal distribution.Titanium is mainly homed in rutile(the main titaniferous mineral),ilmenite and titanite.Rutile occurs in the following states:encapsulated structure,intergranular structure,beaded structure,intercrystlline structure and degenerated residual structure.Through the study of rutile mineralogy and mineral chemistry,the geochemicalcharacteristics of rutile minerals with different structures were tested.The mineralogical and mineral chemical characteristics of rutile were analyzed by EPMA.The main occurrence forms,mineral chemical characteristics and metallogenic stage of rutile under the UPM stage were discussed.

关 键 词：柴北缘 榴辉岩 金红石 地球化学 电子探针 

分 类 号：P574.2[天文地球—矿物学] P575.1[天文地球—地质学]