电子显微学报
電子顯微學報
전자현미학보
JOURNAL OF CHINESE ELECTRON MICROSCOPY SOCIETY
2014年
2期
108-116
,共9页
聂潇%尹京武%陈浦浦%王梦亚%闫星光%侯凤娇%张寿庭%李亮
聶瀟%尹京武%陳浦浦%王夢亞%閆星光%侯鳳嬌%張壽庭%李亮
섭소%윤경무%진포포%왕몽아%염성광%후봉교%장수정%리량
矽卡岩%矿物学%电子探针%三道庄
矽卡巖%礦物學%電子探針%三道莊
석잡암%광물학%전자탐침%삼도장
skarn%mineralogy%electron probe analysis%Sandaozhuang
三道庄钼钨矿床位于河南省栾川县,为东秦岭多金属成矿带上的大型钨钼矿床之一。矿体赋存于矽卡岩中,以似层状产出。根据野外矽卡岩的产出状态,显微镜观察结合电子探针分析对三道庄钨钼矿床中矽卡岩的主要组成矿物石榴石进行了矿物学特征研究。石榴子石电子探针分析结果表明,石榴石属于钙铁榴石-钙铝榴石系列。结合前人的矿床地质、成矿年代学、流体包裹体研究及本次研究结果,认为该矿床为典型的矽卡岩成因类型。矿床形成过程中成矿流体经历了从早到晚温度和盐度下降,而pH值和氧逸度上升的过程。
三道莊鉬鎢礦床位于河南省欒川縣,為東秦嶺多金屬成礦帶上的大型鎢鉬礦床之一。礦體賦存于矽卡巖中,以似層狀產齣。根據野外矽卡巖的產齣狀態,顯微鏡觀察結閤電子探針分析對三道莊鎢鉬礦床中矽卡巖的主要組成礦物石榴石進行瞭礦物學特徵研究。石榴子石電子探針分析結果錶明,石榴石屬于鈣鐵榴石-鈣鋁榴石繫列。結閤前人的礦床地質、成礦年代學、流體包裹體研究及本次研究結果,認為該礦床為典型的矽卡巖成因類型。礦床形成過程中成礦流體經歷瞭從早到晚溫度和鹽度下降,而pH值和氧逸度上升的過程。
삼도장목오광상위우하남성란천현,위동진령다금속성광대상적대형오목광상지일。광체부존우석잡암중,이사층상산출。근거야외석잡암적산출상태,현미경관찰결합전자탐침분석대삼도장오목광상중석잡암적주요조성광물석류석진행료광물학특정연구。석류자석전자탐침분석결과표명,석류석속우개철류석-개려류석계렬。결합전인적광상지질、성광년대학、류체포과체연구급본차연구결과,인위해광상위전형적석잡암성인류형。광상형성과정중성광류체경력료종조도만온도화염도하강,이pH치화양일도상승적과정。
The Sandaozhuang Mo-W deposit in Luanchuan County, Henan province, is one of the giant Mo-W deposits in the East Qinling molybdenum belt. The stratford ore body was hosted in skarn. By means of the field survey, the microscopic observation and EPMA, mineralogical characteristics of the major skarn mineral such as garnet and pyroxene were investigated. Electron probe analysis show that the end member of garnet in the ore deposit is dominated by andradite-grossularite. From the previous researches on geological characteristics and geochronology and the results of this study, the authors hold that the Sandaozhuang ore deposit is a typical skarn deposit. During the deposit formation, the salinity and temperature of ore-forming fluid gradually decrease, while oxygen fugacity and pH gradually increase from early to late.