安徽安庆铜矿接触带三维形态及其控矿机制分析
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摘要
安庆铜矿是长江中下游成矿带中规模最大的铜铁矿床,其绝大部分矿体产在月山岩体与三叠系灰岩的接触带上,矿体的产出位置及规模与接触带的特征密切相关。本文通过三维模拟的方法研究了岩体接触带的三维形态及其与安庆铜矿矿体空间定位的关系,认为:月山矿田的矿体分布极不均匀,绝大部分矿体产在形态复杂、产状显著变化的岩体东枝南接触带;安庆铜矿的控矿接触带形态从东到西具有阶梯状-阶梯状、舌状过渡-舌状的变化规律;阶梯状接触带的陡倾及由陡变缓的位置和舌状接触带的尖端处是主要的成矿部位。上述接触带控矿规律推测是区域构造应力场、岩体侵位、冷凝造成的局部应力场以及成矿流体共同作用的结果。
The Anqing copper deposit is the biggest copper-iron deposit in the lower-middle Yangtze metallogenic belt.Most orebodies of this deposit lie in the contact zone between Yueshan intrusion and the Triasssic limestone.The position and scale of ore bodies are closely related to the characteristics of the contact zone.Studies on the three-dimensional geometry of the contact zone and its relation to controlling on ore bodies of the deposit are performed based on three-dimensional simulation in this paper.Results show that the ore bodies of the Yueshan field are distributed much unevenly;of which most are located in the southern contact zones of the eastern intrusion branch which is complicated in shape and highly various in occurrence.In the Anqing deposit,the shapes of ore-controlling contact zone are characterized by step,step-tongue transition,and tongue from the east to the west.The steep position and the position turning from steep to gentle in step-shaped contact zone and the tip of the tongue-like zone are the major sites of mineralization.It is inferred that the interaction of the regional tectonic stress field,local stress field arose from pluton intruding and cooling and fluid flow resulted in the above mentioned ore-controlling regularities of the contact zone.
The Anqing copper deposit is the biggest copper-iron deposit in the lower-middle Yangtze metallogenic belt.Most orebodies of this deposit lie in the contact zone between Yueshan intrusion and the Triasssic limestone.The position and scale of ore bodies are closely related to the characteristics of the contact zone.Studies on the three-dimensional geometry of the contact zone and its relation to controlling on ore bodies of the deposit are performed based on three-dimensional simulation in this paper.Results show that the ore bodies of the Yueshan field are distributed much unevenly;of which most are located in the southern contact zones of the eastern intrusion branch which is complicated in shape and highly various in occurrence.In the Anqing deposit,the shapes of ore-controlling contact zone are characterized by step,step-tongue transition,and tongue from the east to the west.The steep position and the position turning from steep to gentle in step-shaped contact zone and the tip of the tongue-like zone are the major sites of mineralization.It is inferred that the interaction of the regional tectonic stress field,local stress field arose from pluton intruding and cooling and fluid flow resulted in the above mentioned ore-controlling regularities of the contact zone.
引文
[1]安徽省地质矿产局326地质队.1989.月山矿田大比例尺成矿预测地质报告:22-29
[2]刘亮明.2004.安庆矿田铜金成矿规律及找矿潜力分析-铜都铜业股份有限公司地质找矿科研报告:7-10
Chen Jiang-feng,Li Xue-ming,Zhou Tai-xi,K.A.Foland.1991.40Ar/39Ar Dating for the Yueshan Diorite,Anhui Province and theEstimated Formation Time of the Associated Ore Deposit[J].Geosci-ence,5(1):91-99(in Chinese with English abstract)
Dong Shu-wen,Qiu Rui-long.1993.Tectonism and magmatism in theAnqing-Yueshan area[M].1st Edition.Beijing:Geological Pub-lishing House:1-18(in Chinese)
Liu Liang-ming,Shu Zhi-ming,Zhao Chong-bin,Wan Chang-lin,Cai Ai-liang,Zhao Yi-lai.2008.The Controlling mechanism ofore Formation due to flow-focusing dilation spaces in Skarn ore de-posits and its significance for deep-ore exploration:examples fromthe Tongling-Anqing district[J].Acta Petrologica Sinica,24(8):1848-1856(in Chinese with English abstract)
Liu Yu-cheng.2006.The combination of the integrated prospectingmethod and the ore-control structure and its application in the Dayeiron mine[J].Mineral Deposits,25(supp.):431-434(in Chinesewith English abstract)
Mao Jing-wen,Li Hong-yan,B Guy,L Raimbault.1996.Geology andmetallogeny of the Shizhuyuan skarn-greisen W-Sn-Mo-Bi de-posit,Hunan province[J].Mineral Deposits,15(1):1-15(inChinese with English abstract)
Nie Feng-jun,Zhang Wan-yi,Du An-dao,Jiang Si-hong,Liu Yan.2007.Re-Os isotopic age dating of molybdenite separates from theChaobuleng skarn iron-polymetallic deposit,Dong Ujimqin Ban-ner,Inner Mongolia[J].Acta Geoscientica Sinica,28(4):315-323(in Chinese with English abstract)
Qiu Rui-long.1992.Petrological characteristics and genesis of High-Kdiorites in Yueshan,Anhui province[J].Geological Review,38(2):98-107(in Chinese with English abstract)
Wang Jian-zhong,Li Jian-wei,Zhao Xin-fu,Qian Zhuang-zhi,MaChang-qian.2008.Genesis of the Chaoshan gold deposit and its hostintrusion,Tongling area:constraints from40Ar/39Ar ages and elemen-tal and Sr-Nd-O-C-S isotope geochemistry[J].Acta PetrologicaSinica,24(8):1875-1888(in Chinese with English abstract)
Wu Li-xin,Shi Wen-zhong,Christopher Gold.2003.Spatial modelingtechnologies for3D GIS and3D GMS[J].Geography and Geo-In-formation Science,19(1):5-11(in Chinese with English abstract)
Xu Hui-huang,Wu Shi-chong,Yu Yang-chun,Xie You-liang,LongWei-ping.2006.Geological characteristics and ore-controllingfactors of Xitian skarn-type W-Sn deposit in Hunan province[J].Geology and Mineral Resources of South China,(2):37-42(inChinese with English abstract)
Yan Gui-lin,Zhang Ming,Li Yong-tao.1990.On magnetic fabric andpalaeomagnetism of the Yueshan pluton,Anqing,Anhui[J].EarthScience,15(6):667-673(in Chinese with English abstract)
Yu Jun-peng,Qin Song-xian.2007.Intrusive contact structures in theNorthwest of the Guposhan pluton,Southern Hunan province[J].Geological Science and Technology Information,26(2):25-29(inChinese with English abstract)
Zhang Chuan-ling,Lin Xin-duo,Zhang Shu-zhen.1994.Ore-con-trolling regularities of structure in the frontal Zone of Yueshan intru-sion in Huaining,Anhui province[J].Mineral Deposits,13(supp.):107-109(in Chinese with English abstract)
Zhao Yi-ming,Lin Wen-wei,Bi Cheng-si,Li Da-xin.1986.Basicgeological characteristics of skarn deposits of China[J].Acta Ge-osicientia Sinica,14(3):59-87(in Chinese with English abstract)
Zhou Tao-fa,Liu Xiao-dong,Yuan Feng,Yue Shu-cang.2001.Mi-gration velocity and scale of the ore-forming fluid for Formation ofCu,Au deposits in Yueshan orefield,Anhui province[J].Geolog-ical Review,47(2):139-145(in Chinese with English abstract)
Zhou Tao-fa,Yuan Feng,Yue Shu-cang,Liu Xiao-dong,Zhao Yong.2002.Water/rock interaction during Formation of skarn-type de-posits in Yueshan orefield,Anhui province[J].Mineral Deposits,21(1):1-9(in Chinese with English abstract)
Zhou Tao-fa,Yue Shu-cang.1997.Formation mechanism of copper de-posits in Yueshan orefield,Anhui province[J].Journal of Chang-chun University of Earth Sciences,27(3):310-316(in Chinesewith English abstract)
Zhou Tao-fa,Yue Shu-cang,Yuan Feng.2005.Lithogenesis of dioritesand copper,gold mineralization in Yueshan ore field,Anhui province[M].1st Edition.Beijing:Geological Publishing House:13-17(inChinese)
Zhou TF,Yuan F,Yue S C,Liu X D,Zhang X,Fan Y.2007.Geochemis-try and evolution of ore-forming fluids of the Yueshan Cu-Auskarn-and vein-yype deposits,Anhui province,South China[J].Ore Geology Reviews,31(1-4):279-303(in Chinese with Eng-lish abstract)
陈江峰,李学明,周泰禧,K.A.Foland.1991.安徽月山岩体的40Ar/39Ar年龄及与其有关的成矿时代估计[J].现代地质,5(1):91-99
董树文,邱瑞龙.1993.安庆-月山地区构造作用与岩浆活动[M].北京:地质出版社:1-18
刘亮明,疏志明,赵崇斌,万昌林,蔡爱良,赵义来.2008.矽卡岩矿床的汇流扩容空间控矿机制及其对深部找矿的意义:以铜陵-安庆地区为例[J].岩石学报,24(8):1848-1856
刘玉成.2006.综合找矿方法和接触带控矿构造研究在大冶铁矿深部找矿中的应用[J].矿床地质,25(增刊):431-434
毛景文,李红艳,B Guy,L Raimbault.1996.湖南柿竹园矽卡岩-云英岩型W-Sn-Mo-Bi矿床地质和成矿作用[J].矿床地质,15(1):1-15
聂凤军,张万益,杜安道,江思宏,刘妍.2007.内蒙古朝不楞矽卡岩型铁多金属矿床辉钼矿铼-锇同位素年龄及地质意义[J].地球学报,28(4):315-323
邱瑞龙.1992.安徽月山高钾闪长岩岩石学特征及岩石成因探讨[J].地质论评,38(2):98-107
王建中,李建威,赵新福,钱壮志,马昌前.2008.铜陵地区朝山矽卡岩型金矿床及含矿岩体的成因:40Ar/39Ar年龄、元素地球化学及多元同位素证据[J].岩石学报,24(8):1875-1888
吴立新,史文中,Christopher Gold.2003.3D GIS与3D GMS中的空间构模技术[J].地理与地理信息科学,19(1):5-11
徐辉煌,伍式崇,余阳春,谢友良,龙伟平.2006.湖南锡田地区矽卡岩型钨锡矿床地质特征及控矿因素[J].华南地质与矿产,(2):37-42
阎桂林,张鸣,李永涛.1990.安徽安庆月山岩体的磁组构及古地磁特征[J].地球科学,15(6):667-673
余君鹏,秦松贤.2007.湘南姑婆山岩体北西侧侵入接触带构造控矿研究[J].地质科技情报,26(2):25-29
章传玲,林新多,张叔贞.1994.安徽省怀宁月山岩体侵入前缘带构造的控矿规律[J].矿床地质,13(增刊):107-109
赵一鸣,林文蔚,毕承思,李大新.1986.中国矽卡岩矿床基本地质特征[J].地球学报,14(3):59-87
周涛发,刘晓东,袁峰,岳书仓.2001.安徽月山矿田成矿流体的迁移速率和规模[J].地质论评,47(2):139-145
周涛发,袁峰,岳书仓,刘晓东,赵勇.2002.安徽月山矿田夕卡岩型矿床形成的水岩作用[J].矿床地质,21(1):1-9
周涛发,岳书仓.1997.安徽月山矿田铜矿床的形成机制[J].长春地质学院学报,27(3):310-316
周涛发,岳书仓,袁峰.2005.安徽月山矿田成岩成矿作用[M].北京:地质出版社:13-17
[2]刘亮明.2004.安庆矿田铜金成矿规律及找矿潜力分析-铜都铜业股份有限公司地质找矿科研报告:7-10
Chen Jiang-feng,Li Xue-ming,Zhou Tai-xi,K.A.Foland.1991.40Ar/39Ar Dating for the Yueshan Diorite,Anhui Province and theEstimated Formation Time of the Associated Ore Deposit[J].Geosci-ence,5(1):91-99(in Chinese with English abstract)
Dong Shu-wen,Qiu Rui-long.1993.Tectonism and magmatism in theAnqing-Yueshan area[M].1st Edition.Beijing:Geological Pub-lishing House:1-18(in Chinese)
Liu Liang-ming,Shu Zhi-ming,Zhao Chong-bin,Wan Chang-lin,Cai Ai-liang,Zhao Yi-lai.2008.The Controlling mechanism ofore Formation due to flow-focusing dilation spaces in Skarn ore de-posits and its significance for deep-ore exploration:examples fromthe Tongling-Anqing district[J].Acta Petrologica Sinica,24(8):1848-1856(in Chinese with English abstract)
Liu Yu-cheng.2006.The combination of the integrated prospectingmethod and the ore-control structure and its application in the Dayeiron mine[J].Mineral Deposits,25(supp.):431-434(in Chinesewith English abstract)
Mao Jing-wen,Li Hong-yan,B Guy,L Raimbault.1996.Geology andmetallogeny of the Shizhuyuan skarn-greisen W-Sn-Mo-Bi de-posit,Hunan province[J].Mineral Deposits,15(1):1-15(inChinese with English abstract)
Nie Feng-jun,Zhang Wan-yi,Du An-dao,Jiang Si-hong,Liu Yan.2007.Re-Os isotopic age dating of molybdenite separates from theChaobuleng skarn iron-polymetallic deposit,Dong Ujimqin Ban-ner,Inner Mongolia[J].Acta Geoscientica Sinica,28(4):315-323(in Chinese with English abstract)
Qiu Rui-long.1992.Petrological characteristics and genesis of High-Kdiorites in Yueshan,Anhui province[J].Geological Review,38(2):98-107(in Chinese with English abstract)
Wang Jian-zhong,Li Jian-wei,Zhao Xin-fu,Qian Zhuang-zhi,MaChang-qian.2008.Genesis of the Chaoshan gold deposit and its hostintrusion,Tongling area:constraints from40Ar/39Ar ages and elemen-tal and Sr-Nd-O-C-S isotope geochemistry[J].Acta PetrologicaSinica,24(8):1875-1888(in Chinese with English abstract)
Wu Li-xin,Shi Wen-zhong,Christopher Gold.2003.Spatial modelingtechnologies for3D GIS and3D GMS[J].Geography and Geo-In-formation Science,19(1):5-11(in Chinese with English abstract)
Xu Hui-huang,Wu Shi-chong,Yu Yang-chun,Xie You-liang,LongWei-ping.2006.Geological characteristics and ore-controllingfactors of Xitian skarn-type W-Sn deposit in Hunan province[J].Geology and Mineral Resources of South China,(2):37-42(inChinese with English abstract)
Yan Gui-lin,Zhang Ming,Li Yong-tao.1990.On magnetic fabric andpalaeomagnetism of the Yueshan pluton,Anqing,Anhui[J].EarthScience,15(6):667-673(in Chinese with English abstract)
Yu Jun-peng,Qin Song-xian.2007.Intrusive contact structures in theNorthwest of the Guposhan pluton,Southern Hunan province[J].Geological Science and Technology Information,26(2):25-29(inChinese with English abstract)
Zhang Chuan-ling,Lin Xin-duo,Zhang Shu-zhen.1994.Ore-con-trolling regularities of structure in the frontal Zone of Yueshan intru-sion in Huaining,Anhui province[J].Mineral Deposits,13(supp.):107-109(in Chinese with English abstract)
Zhao Yi-ming,Lin Wen-wei,Bi Cheng-si,Li Da-xin.1986.Basicgeological characteristics of skarn deposits of China[J].Acta Ge-osicientia Sinica,14(3):59-87(in Chinese with English abstract)
Zhou Tao-fa,Liu Xiao-dong,Yuan Feng,Yue Shu-cang.2001.Mi-gration velocity and scale of the ore-forming fluid for Formation ofCu,Au deposits in Yueshan orefield,Anhui province[J].Geolog-ical Review,47(2):139-145(in Chinese with English abstract)
Zhou Tao-fa,Yuan Feng,Yue Shu-cang,Liu Xiao-dong,Zhao Yong.2002.Water/rock interaction during Formation of skarn-type de-posits in Yueshan orefield,Anhui province[J].Mineral Deposits,21(1):1-9(in Chinese with English abstract)
Zhou Tao-fa,Yue Shu-cang.1997.Formation mechanism of copper de-posits in Yueshan orefield,Anhui province[J].Journal of Chang-chun University of Earth Sciences,27(3):310-316(in Chinesewith English abstract)
Zhou Tao-fa,Yue Shu-cang,Yuan Feng.2005.Lithogenesis of dioritesand copper,gold mineralization in Yueshan ore field,Anhui province[M].1st Edition.Beijing:Geological Publishing House:13-17(inChinese)
Zhou TF,Yuan F,Yue S C,Liu X D,Zhang X,Fan Y.2007.Geochemis-try and evolution of ore-forming fluids of the Yueshan Cu-Auskarn-and vein-yype deposits,Anhui province,South China[J].Ore Geology Reviews,31(1-4):279-303(in Chinese with Eng-lish abstract)
陈江峰,李学明,周泰禧,K.A.Foland.1991.安徽月山岩体的40Ar/39Ar年龄及与其有关的成矿时代估计[J].现代地质,5(1):91-99
董树文,邱瑞龙.1993.安庆-月山地区构造作用与岩浆活动[M].北京:地质出版社:1-18
刘亮明,疏志明,赵崇斌,万昌林,蔡爱良,赵义来.2008.矽卡岩矿床的汇流扩容空间控矿机制及其对深部找矿的意义:以铜陵-安庆地区为例[J].岩石学报,24(8):1848-1856
刘玉成.2006.综合找矿方法和接触带控矿构造研究在大冶铁矿深部找矿中的应用[J].矿床地质,25(增刊):431-434
毛景文,李红艳,B Guy,L Raimbault.1996.湖南柿竹园矽卡岩-云英岩型W-Sn-Mo-Bi矿床地质和成矿作用[J].矿床地质,15(1):1-15
聂凤军,张万益,杜安道,江思宏,刘妍.2007.内蒙古朝不楞矽卡岩型铁多金属矿床辉钼矿铼-锇同位素年龄及地质意义[J].地球学报,28(4):315-323
邱瑞龙.1992.安徽月山高钾闪长岩岩石学特征及岩石成因探讨[J].地质论评,38(2):98-107
王建中,李建威,赵新福,钱壮志,马昌前.2008.铜陵地区朝山矽卡岩型金矿床及含矿岩体的成因:40Ar/39Ar年龄、元素地球化学及多元同位素证据[J].岩石学报,24(8):1875-1888
吴立新,史文中,Christopher Gold.2003.3D GIS与3D GMS中的空间构模技术[J].地理与地理信息科学,19(1):5-11
徐辉煌,伍式崇,余阳春,谢友良,龙伟平.2006.湖南锡田地区矽卡岩型钨锡矿床地质特征及控矿因素[J].华南地质与矿产,(2):37-42
阎桂林,张鸣,李永涛.1990.安徽安庆月山岩体的磁组构及古地磁特征[J].地球科学,15(6):667-673
余君鹏,秦松贤.2007.湘南姑婆山岩体北西侧侵入接触带构造控矿研究[J].地质科技情报,26(2):25-29
章传玲,林新多,张叔贞.1994.安徽省怀宁月山岩体侵入前缘带构造的控矿规律[J].矿床地质,13(增刊):107-109
赵一鸣,林文蔚,毕承思,李大新.1986.中国矽卡岩矿床基本地质特征[J].地球学报,14(3):59-87
周涛发,刘晓东,袁峰,岳书仓.2001.安徽月山矿田成矿流体的迁移速率和规模[J].地质论评,47(2):139-145
周涛发,袁峰,岳书仓,刘晓东,赵勇.2002.安徽月山矿田夕卡岩型矿床形成的水岩作用[J].矿床地质,21(1):1-9
周涛发,岳书仓.1997.安徽月山矿田铜矿床的形成机制[J].长春地质学院学报,27(3):310-316
周涛发,岳书仓,袁峰.2005.安徽月山矿田成岩成矿作用[M].北京:地质出版社:13-17
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