安徽池州马头铜钼矿主成矿元素分布特征及富集机理
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摘要
马头铜钼矿床是江南过渡带池州段达到详查级别的矿床。根据该矿床的矿化分布特征、6个钻孔的成矿元素分析结果,结合镜下鉴定分析认为,马头铜钼矿床岩浆热源中心位于15线以南的西山岩体深部,成矿流体运移方向呈南南西→北北东、西山岩体深部→浅部、岩体中心→远离岩体的迁移规律。Cu、Mo、W等金属元素的迁移、沉淀、富集不是某一种因素单独造成的,而是各种物理化学和地质因素共同作用的结果,是不同期次成矿流体产物的叠加。研究区成矿流体至少有2期,一期为富含以钼为主、伴生铜的热液,另一期为以富铜为主的热液。
Matou copper-molybdenum deposit was one of the few general exploration deposits in Chizhou section of Jiangnan transitional zone,and its molybdenum resources reached medium-sized. According to mineralization distribution characteristics,the analysis results of six drilling of ore-forming elements,and in combination with microscopic identification and observation,the authors thought that the magmatic heat centre of Matou copper-molybdenum was located in the deep of Xishan rock mass,south of the prospecting line 15.The directions of ore-forming fluid migration were characteristic of SSW to NNW trend,from deep to shallow of Xishan rock mass,from rock mass center to the distant place. Metals such as Cu,Mo,W migration,precipitation and enrichment were caused by the combination of various physical and chemical and geological factors. The ore-forming fluids were at least of two phases,one period for rich was given priority to molybdenum associated with hydrothermal copper,the other was given priority to copper-rich hydrothermal fluid.
Matou copper-molybdenum deposit was one of the few general exploration deposits in Chizhou section of Jiangnan transitional zone,and its molybdenum resources reached medium-sized. According to mineralization distribution characteristics,the analysis results of six drilling of ore-forming elements,and in combination with microscopic identification and observation,the authors thought that the magmatic heat centre of Matou copper-molybdenum was located in the deep of Xishan rock mass,south of the prospecting line 15.The directions of ore-forming fluid migration were characteristic of SSW to NNW trend,from deep to shallow of Xishan rock mass,from rock mass center to the distant place. Metals such as Cu,Mo,W migration,precipitation and enrichment were caused by the combination of various physical and chemical and geological factors. The ore-forming fluids were at least of two phases,one period for rich was given priority to molybdenum associated with hydrothermal copper,the other was given priority to copper-rich hydrothermal fluid.
引文
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张遵忠,薛虎,陈雪,等.2009.安徽省池州市马头钼铜矿床地质地球化学及找矿方向研究[R].南京:华东有色地质勘查局资源调查与评价研究院.
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HEDENQUIST J W,LOWENSTER J B.1994.The role of magmas in the formation of hydrothemal ore Deposits[J].Nature,370:519-527.
杜玉雕.2012.安徽东源钨钼矿床流体特征与成矿机制[D].北京:中国地质大学(北京).
黄朋,顾雪祥,唐菊兴.2000.西藏玉龙斑岩铜(钼)矿金属迁移、沉淀机制探讨[J].四川地质学报,20(1):57-62.
黄朋,顾雪祥,唐菊兴,等.2002.西藏玉龙斑岩铜(钼)矿床物质来源研究[J].大地构造与成矿学,26(4):429-435.
华东有色地质矿产勘查开发院.2010.安徽省池州市马头矿床下冲矿段铜钼矿详查地质报告[R].南京:华东有色地质矿产勘查开发院.
霍明宇,王莹,解国爱,等.2013.安徽池州马头铜钼矿容矿构造特征及构造应力场分析[J].地质学刊,37(2):284-291.
蒋国豪.2004.氟、氯对热液钨、铜成矿的制约:以江西德兴铜矿、大吉山钨矿为例[D].贵阳:中国科学院地球化学研究所.
刘英俊,马东升.1987.钨的地球化学[M].北京:科学出版社.
雷恩.2009.吉林珲春杨金沟白钨矿床地质地球化学特征及成因[D].长春:吉林大学地球科学学院.
芮宗瑶,黄崇轲,齐国明,等.1984.中国斑岩铜(钼)矿床[M].北京:地质出版社.
宋国学,秦克章,李光明.2010.长江中下游池州地区矽卡岩-斑岩型W-Mo矿床流体包裹体与H、O、S同位素研究[J].岩石学报,26(9):2768-2782.
王伟华.2011.安徽池州马头铜钼矿床特征及找矿思路[J].地质学刊,35(3):311-316.
薛卫冲,王莹,解国爱,等.2013.安徽池州马头铜钼矿容矿构造特征及构造应力场浅析[J].地质学刊,37(2):284-291.
周涛发,岳书仓,袁峰,等.2000.长江中下游两个系列铜、金矿床及其成矿流体系统的氢、氧、硫、铅同位素研究[J].中国科学:地球科学,30(增刊1):122-128.
张德会,龚庆杰.2001a.初论元素富集成矿的地球化学机理:以岩浆热液矿床的形成为例[J].地质地球化学,29(3):8-14.
张德会,张文雅,许国建.2001b.岩浆热液出溶和演化对斑岩成矿系统金属成矿的制约[J].地学前缘,8(3):193-203.
张遵忠,薛虎,陈雪,等.2009.安徽省池州市马头钼铜矿床地质地球化学及找矿方向研究[R].南京:华东有色地质勘查局资源调查与评价研究院.
CLINE J S,VANKO D A.1995.Magmatically generated salinebrines related to molybdenum at Questa,New Mexico,USA[G]//THOMPSON J F H.Magmas,Fluids,and Ore Deposits:Mineralogical Association of Canada,Short CourseSeries 23.Victoria:Mineralogical Association of Canada,153-174.
HEDENQUIST J W,LOWENSTER J B.1994.The role of magmas in the formation of hydrothemal ore Deposits[J].Nature,370:519-527.
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