云南元阳菲莫铜钼多金属矿床成因及成矿模式
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摘要
文章在矿床地质、地球化学及同位素年代学研究的基础上,总结了菲莫铜钼多金属矿床的成因及理想模式。矿床中岩、矿石S、Pb同位素组成显示,矿床成矿物质主要来源于深部地幔或下地壳古老基底,后混入部分上地壳物质;H、O同位素特征显示,矿床成矿热液以上升的岩浆热液为主,结合部分变质热液及渗透淋滤的大气降水形成混合热液;Re-Os同位素测年得出矿床形成时间为(47·81±0·71)Ma,矿化主要发生于大皮甲岩体岩浆侵位晚期的期后热液阶段。矿床成因类型属沉积-变质-岩浆热液叠加改造型铜钼多金属矿床。成矿作用具长期性、多期次、多来源、多阶段、多成因的特征,大致经历了古元古代的沉积定位阶段→中新元古代的区域变质改造富集阶段→喜马拉雅期的颠覆性改造叠加富集成矿阶段。
In this paper,the authors summarized the metallogenic model of the Feimo Cu-Mo polymetalic deposit on the basis of geological,geochemical and isotopic geochronological characteristics of the ore deposit.The S,Pb isotopes of rocks and ores show that the metallogenic material was derived from deep mantle source,with the addition of a certain amount of crust-derived material at the late stage.H,O isotope characteristics show that the ore-forming hydrothermal fluid originated from ascending magmatic hydrothermal solution in combination with mixed hydrothermal solutions dominated by permeable meteoric water.Statistic Re-Os isotope dating of the deposit yielded(47.81±0.71) Ma.The main mineralization occurred in the post-magmatic hydrothermal stage of late Dapijia rock mass magmatic emplacement.The ore deposit genetically belongs to the sedimentation-metamorphism-magmatic hydrothermal solution superimposed deformation type Cu-Mo polymetallic deposit.The mineralization of the deposit was characterized by long period,multi-phase,poly-source,poly-stage and multi-genesis,and the ore-forming process experienced the sedimentary locating stage of Proterozoic,regional metamorphism-reformation-enrichment stage of middle-late Proterozoic,and subversive reformation superposition enrichment stage of Himalayan period.
In this paper,the authors summarized the metallogenic model of the Feimo Cu-Mo polymetalic deposit on the basis of geological,geochemical and isotopic geochronological characteristics of the ore deposit.The S,Pb isotopes of rocks and ores show that the metallogenic material was derived from deep mantle source,with the addition of a certain amount of crust-derived material at the late stage.H,O isotope characteristics show that the ore-forming hydrothermal fluid originated from ascending magmatic hydrothermal solution in combination with mixed hydrothermal solutions dominated by permeable meteoric water.Statistic Re-Os isotope dating of the deposit yielded(47.81±0.71) Ma.The main mineralization occurred in the post-magmatic hydrothermal stage of late Dapijia rock mass magmatic emplacement.The ore deposit genetically belongs to the sedimentation-metamorphism-magmatic hydrothermal solution superimposed deformation type Cu-Mo polymetallic deposit.The mineralization of the deposit was characterized by long period,multi-phase,poly-source,poly-stage and multi-genesis,and the ore-forming process experienced the sedimentary locating stage of Proterozoic,regional metamorphism-reformation-enrichment stage of middle-late Proterozoic,and subversive reformation superposition enrichment stage of Himalayan period.
引文
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李文,李兆麟,石贵勇.2002.云南哀牢山变质流体特征[J].岩石学报,16(4):649-654.
李兴振,江新胜,孙志明,沈敢富,杜德勋.2002.西南三江地区碰撞造山过程[M].北京:地质出版社.148-207.
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刘秉光,胡瑞忠,毕献武,丁奎首,汪道京.2000.川滇西三江地区Cu、Au、Ag、Ge及多金属成矿远景区[A].主编:涂光炽.中国超大型矿床[C].北京:科学出版社.348-371.
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沈渭洲.1987.稳定同位素地质[M].北京:原子能出版社.1-425.
沈远仁.1975.大红山铁矿含矿岩系的特征与成因归属[J].地质与勘探,35(8):37-41.
唐尚鹑,李经典,何叔欣.1991.哀牢山北段金矿带成矿规律初探[J].云南地质,(1):44-69.
吴自成,刘继顺,舒国文,王伟,马慧英.2010.南岭燕山期构造岩浆热事件与锡田锡、钨成矿[J].地质找矿论丛,25(3):201205.
鄢明才,迟清华,顾铁新.1996.中国火成岩化学元素的丰度与分布[J].地球化学,25(5):409-424.
杨金富,刘继顺,刘洪滔.2000.云南老新街铜矿床地质特征及成因探讨[J].有色金属矿产与勘查,8(6):470-475.
翟明国,丛柏林,乔广生,张儒瑗.1990.中国滇西南造山带变质岩的Sm-Nd和Rb-Sr同位素年代学[J].岩石学报,(4):1-11.
张彩华.2007.澜沧江火山弧云县段铜矿床地质特征、成矿模式与找矿预测(博士学位论文)[D].导师:刘继顺.长沙:中南大学.8384.
张鸿翔,刘从强,徐志方,黄智龙.2001.扬子板块西缘古元古代俯冲体系的地球化学证据——有关变基性岩的微量元素地球化学研究[J].矿物学报,21(2):231-237.
张进江,钟大赉,桑海清,周勇.2006.哀牢山-红河构造带古新世以来多期活动的构造和年代学证据[J].地质科学,41(2):291-310.
张志兰,张树发,袁海华,何大伦.1987.云南墨江金厂金矿的同位素地质特征及成因探讨[J].成都地质学院学报,14(4):29-40.
朱炳泉.1998.地球科学中同位素体系理论与应用——兼论中国大陆壳幔演化[M].北京:科学出版社.216-230.
祝向平.2010.云南哈播斑岩型铜(-钼-金)矿床地质特征与成矿作用研究(博士学位论文)[D].导师:莫宣学.北京:中国地质大学.19-23.
邹日,朱炳泉,孙大中,常向阳.1997.红河成矿带壳慢演化与成矿作用的年代学研究[J].地球化学,26(2):46-56.
Bohlkea J K,De Laeter J R,De Bievre P,Peiserb H S,Rosman K J Rand Taylor P D P.2005.Isotopic Compositions of the Elements[J].J.Phys.Chem.Ref.,34(1):57-67.
Doe B R.1974.The application of the lead isotopes to the problems ofore genesis and prospect evolution:A review[J].Econ.Geol.,69:757-776.
Ohmoto H and Rye R O.1979.Isotopes of surfer and carbon[A].In:Geochemistry of hydrothermal ore deposits[M].New York:JohnWiley and Sons.509-567.
Taylor H P.1974.The application of oxygen and hydrogen isotopestudies to problems of hydrothermal alteration and ore deposit[J].Econ.Geol.,69:843-883.
Wieser M E.2005.Atomic weights of the elements(IUPAC technicalreport)[J].Pure Appl.Chemistry,78(11):2051-2066.
Zhu B Q.1990.Three-component mixingand foursystem recyclingmodels for explaining Nd-Sr-Pb isotopic correlations of suboceanicand subcontinental mantles[J].Science in China,33:757-768.
崔银亮,秦德先,陈耀光.2004.云南省龙脖河铜矿区火山岩地质及岩石化学特征研究[J].矿产与地质,18(6):532-536.
高建国,夏既胜,陈昌勇.2000.滇西富碱斑岩地球化学特征与金(多金属)矿成矿分析[J].大地构造与成矿学,24(增刊):44-56.
韩润生,金世昌,雷丽.1997.云南元阳大坪改造型金矿床的成矿热液系统地球化学[J].矿物学报,17(3):337-344.
何文举.1993.镇沅金矿田煌斑岩特征及其与金矿成矿关系[J].云南地质,12(2):148-158.
李嘉林.1988.地球化学导论[M].兰州:兰州大学出版社.123-134.
李文,李兆麟,石贵勇.2002.云南哀牢山变质流体特征[J].岩石学报,16(4):649-654.
李兴振,江新胜,孙志明,沈敢富,杜德勋.2002.西南三江地区碰撞造山过程[M].北京:地质出版社.148-207.
李元.1992.墨江金矿床的成矿物质来源探讨[J].云南地质,(2):130-143.
刘秉光,胡瑞忠,毕献武,丁奎首,汪道京.2000.川滇西三江地区Cu、Au、Ag、Ge及多金属成矿远景区[A].主编:涂光炽.中国超大型矿床[C].北京:科学出版社.348-371.
莫宣学,路凤香,沈上越,朱勤文,侯增谦,杨开辉.1993.三江特提斯火山作用与成矿[M].北京:地质出版社.1-267.
秦德先,燕永锋,田毓龙,刘伟.2000.大红山铜矿床的地质特征及成矿作用演化[J].地质科学,35(2):129-139.
沈渭洲.1987.稳定同位素地质[M].北京:原子能出版社.1-425.
沈远仁.1975.大红山铁矿含矿岩系的特征与成因归属[J].地质与勘探,35(8):37-41.
唐尚鹑,李经典,何叔欣.1991.哀牢山北段金矿带成矿规律初探[J].云南地质,(1):44-69.
吴自成,刘继顺,舒国文,王伟,马慧英.2010.南岭燕山期构造岩浆热事件与锡田锡、钨成矿[J].地质找矿论丛,25(3):201205.
鄢明才,迟清华,顾铁新.1996.中国火成岩化学元素的丰度与分布[J].地球化学,25(5):409-424.
杨金富,刘继顺,刘洪滔.2000.云南老新街铜矿床地质特征及成因探讨[J].有色金属矿产与勘查,8(6):470-475.
翟明国,丛柏林,乔广生,张儒瑗.1990.中国滇西南造山带变质岩的Sm-Nd和Rb-Sr同位素年代学[J].岩石学报,(4):1-11.
张彩华.2007.澜沧江火山弧云县段铜矿床地质特征、成矿模式与找矿预测(博士学位论文)[D].导师:刘继顺.长沙:中南大学.8384.
张鸿翔,刘从强,徐志方,黄智龙.2001.扬子板块西缘古元古代俯冲体系的地球化学证据——有关变基性岩的微量元素地球化学研究[J].矿物学报,21(2):231-237.
张进江,钟大赉,桑海清,周勇.2006.哀牢山-红河构造带古新世以来多期活动的构造和年代学证据[J].地质科学,41(2):291-310.
张志兰,张树发,袁海华,何大伦.1987.云南墨江金厂金矿的同位素地质特征及成因探讨[J].成都地质学院学报,14(4):29-40.
朱炳泉.1998.地球科学中同位素体系理论与应用——兼论中国大陆壳幔演化[M].北京:科学出版社.216-230.
祝向平.2010.云南哈播斑岩型铜(-钼-金)矿床地质特征与成矿作用研究(博士学位论文)[D].导师:莫宣学.北京:中国地质大学.19-23.
邹日,朱炳泉,孙大中,常向阳.1997.红河成矿带壳慢演化与成矿作用的年代学研究[J].地球化学,26(2):46-56.
Bohlkea J K,De Laeter J R,De Bievre P,Peiserb H S,Rosman K J Rand Taylor P D P.2005.Isotopic Compositions of the Elements[J].J.Phys.Chem.Ref.,34(1):57-67.
Doe B R.1974.The application of the lead isotopes to the problems ofore genesis and prospect evolution:A review[J].Econ.Geol.,69:757-776.
Ohmoto H and Rye R O.1979.Isotopes of surfer and carbon[A].In:Geochemistry of hydrothermal ore deposits[M].New York:JohnWiley and Sons.509-567.
Taylor H P.1974.The application of oxygen and hydrogen isotopestudies to problems of hydrothermal alteration and ore deposit[J].Econ.Geol.,69:843-883.
Wieser M E.2005.Atomic weights of the elements(IUPAC technicalreport)[J].Pure Appl.Chemistry,78(11):2051-2066.
Zhu B Q.1990.Three-component mixingand foursystem recyclingmodels for explaining Nd-Sr-Pb isotopic correlations of suboceanicand subcontinental mantles[J].Science in China,33:757-768.
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