河南栾川三道庄钼钨矿床石榴石的矿物学特征研究
聂 潇1,尹京武1*,陈浦浦1,王梦亚1,闫星光1,侯凤娇1,张寿庭2,李 亮3
(中国地质大学1. 科学研究院,2. 地球与科学资源学院,北京100083;3. 洛钼集团,河南洛阳471000)
摘 要: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。
关键词:矽卡岩;矿物学;电子探针;三道庄
中图分类号:P588.31+2;P57;P575.1 文献标识码:A
doi:10.3969/j.1000-6281.2014.02-003
Skarn mineral characteristics of Sandaozhuang Mo-W deposit and their geological significance
NIE Xiao1, YIN Jing-wu1*, CHEN Pu-pu1, WANG Meng-ya1, YAN Xing-guang1,
HOU Feng-jiao1, ZHANG-Shou-ting2, Li-liang3
(1.China University of Geosciences(Beijing),Geologic Laboratories Center, Beijing 100083;2.China University of Geosciences(Beijing), Earth Sciences and Resources, Beijing 100083;3.China Molybdenum Co.,Ltd., Luoyang Henan 471000,China)
Abstract: 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 and almost all pyroxenes belong to sahlite. 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.
Keywords:skarn;mineralogy;electron probe analysis;Sandaozhuang
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[1] 赵一鸣,林文蔚,毕承思,等.中国矽卡岩矿床[M].北京:地质出版社,1990:334-338.
[2] 田朝晖,王斌,李继涛.三道庄钼矿床中白钨矿的赋存特征及其综合回收新进展[J].中国钼业,2001,(02):16-19.
[3] 罗铭玖,董群英,李兴福,等.河南栾川南泥湖—三道庄钼钨矿床的地质特征及矿床类型[J].河南地质,1985,(增刊):237-245.
[4] 瓮纪昌,张云政,黄超勇,等.栾川三道庄特大型钼钨矿床地质特征及矿床成因[J].地质与勘探,2010,46,(01):41-48.
[5] 刘孝善,吴澄宇,严正富,等.河南栾川南泥湖——三道庄钼(钨)矿床围岩蚀变的地质地球化学研究[J].地质找矿论丛,1986,(04):27-39.
[6] 吕仁生.三道庄钼钨矿床矿液流向的研究[J].河南地质,1987,(03):14-18.
[7] 石英霞,李诺,杨艳.河南省栾川县三道庄钼钨矿床地质和流体包裹体研究[J].岩石学报,2009,(10):2575-2587.
[8] 瓮纪昌,潘军占,李文智,等.栾川三道庄特大型钼钨矿床矿石物质成分及成矿阶段划分[J].物探与化探,2010,34(02):170-175.
[9] Einaudi M T,Meinert L D,New berry R J.Skarn deposits[J].Economic Geology,75th Anniv,1981,317-391.
[10] Einaudi M T,Burt D M.Introduction-terminology classification and composition of skarn deposit[J].Econ Geol,1982,77:745-754.
[11] 徐兆文,杨荣勇,任启江.河南栾川燕山期花岗岩小岩体稀土元素地球化学特征[J].南京大学学报(地球科学),1993,5(3):312-319.
[12] 胡受奚,林潜龙.华北与华南古板块拼合带地质和成矿[M].南京:南京大学出版社,1988:1-489.
[13] 蒋德明,付治国,高胜淮,孔德成.河南栾川南泥湖钼矿田成矿物质赋存状态分析[J].中国钼业,2008,32,(01):23-31.
[14] 包志伟,李创举,祁进平.东秦岭栾川铅锌银矿田辉长岩锆石SHRIMP U-Pb年龄及成矿时代[J].岩石学报,2009,(11):2951-2956.
[15] 李兴福,高莱德.河南省栾川县南泥湖钼(钨)矿区详查地质报告[R].1985,83-100.
[16] 刘永春,付治国,高飞,等.河南栾川南泥湖特大型钼矿床成矿母岩地质特征研究[J].中国钼业,2006,(03):13-17+23.
[17] 向君峰,毛景文,裴荣富,等.南泥湖—三道庄钼(钨)矿的成岩成矿年龄新数据及其地质意义[J].中国地质,2012,(02):458-473.
[18] Meinert L D.Skarn and skarn deposits[J].Geoscience Canada,1992,19:45-162.
[19] 李永峰,毛景文,白凤军,等.东秦岭南泥湖钼(钨)矿田Re-Os同位素年龄及其地质意义[J].地质论评,2003,(06):652-659.
[20] 吴澄宇,刘孝善.南泥湖钼(钨)矿化花岗岩体的成因特征[J].南京大学学报(自然科学版),1989,(02):333-346.
[21] 刘长命.南泥湖钼矿田稀土元素地球化学特征[J].河南地质,1987,(03):7-13.
[22] Meinert L D,Dipple G, Nicolescu S.World skarn deposits [J].Economic Geology,100th Anniversary Volume,2005,299-336.
[23] 潘兆橹,赵爱醒,潘铁红.结晶学及矿物学[M].北京:地质出版社,1993:138.
[24] 梁祥济.钙铝-钙铁系列石榴石的特征及其交代机理[J].岩石矿物学杂志,1994,(04):342-352.
[25] 赵斌,李统锦,李昭平.矽卡岩形成的物理化学条件实验研究[J].地球化学,1983,(03):256-267+3.
[26] Jamtvert B,Wogelius R A,Fraser D G. Zonation patterns of skarn garnets-records of hydrothermal system evolution[J].Geology,1993,21(2) :113-116.
[27] Jamtveit B,Ragnarsdottir K V,Wood B J.On the origin of zoned grossular-andradite garnets in hydrothermal systems[J].European Journal of Mineralogy,1995,7(6) :1399-1410.
[28] 刘孝善,吴澄宇,黄标.河南栾川南泥湖-三道庄钼(钨)矿床热液系统的成因与演化[J].地球化学,1987,(03):199-207.