吉林临江迎门岔铜(钼)矿花岗闪长斑岩年代学和地球化学特征
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摘要
LA-ICP-MS锆石U-Pb测年得出花岗闪长斑岩的成岩年龄为(168±1)Ma(中侏罗世),属燕山期岩浆活动产物。岩石地球化学特征显示岩石为准铝质-弱过铝质高钾钙碱性系列,富集Ba、K、Sr,亏损Nb、Ta、P、Ti,δEu异常不明显,属Ⅰ型花岗岩,岩浆来源于地壳部分熔融。综合区域同时代火成岩构造演化背景,认为该矿床形成于古太平洋板块向欧亚大陆俯冲下的火山弧环境。
The diagenetic age of granodiorite porphyry in Yingmencha of Jilin Linjiang is( 168 ± 1) Ma( Middle Jurassic) based on LA-ICP-MS zircon U-Pb dating,a product of Yanshan magmatic activity. The geochemical study shows that the rocks are characterized by aluminum-weakly peraluminous,high in potassium calc-alkaline series,enriched in Sr,Ba and K,depleted in Nb,Ti,Ta and P,and not significant in δEu anomaly,which indicate the rocks belong to the Ⅰ-type granite,and the magma was derived from the partial melting of crust. Combined with the regional tectonic evolution background of igneous rocks,it is considered that the Yingmencha granodiorite porphyry and copper( molybdenum) deposit formed in the environment of volcanic arc under the subduction of the Pa-leo-Pacific plate to the Eurasian plate.
The diagenetic age of granodiorite porphyry in Yingmencha of Jilin Linjiang is( 168 ± 1) Ma( Middle Jurassic) based on LA-ICP-MS zircon U-Pb dating,a product of Yanshan magmatic activity. The geochemical study shows that the rocks are characterized by aluminum-weakly peraluminous,high in potassium calc-alkaline series,enriched in Sr,Ba and K,depleted in Nb,Ti,Ta and P,and not significant in δEu anomaly,which indicate the rocks belong to the Ⅰ-type granite,and the magma was derived from the partial melting of crust. Combined with the regional tectonic evolution background of igneous rocks,it is considered that the Yingmencha granodiorite porphyry and copper( molybdenum) deposit formed in the environment of volcanic arc under the subduction of the Pa-leo-Pacific plate to the Eurasian plate.
引文
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[6]候可军,李延河,田有荣.LA-MC-ICP-MS锆石微区原位U-Pb定年技术[J].矿床地质,2009,28(4):481-492.HOU Ke-jun,LI Yan-he,TIAN You-rong.In situ U-Pb zircon dating using laser ablation-multi ion counting-ICP-MS[J].Mineral Desposits,2009,28(4):481-492.
[7]Liu Y S,Hu Z C,Gao S,et al.In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology,2008,257(1/2):34-43.
[8]Belousova E A,Griffin W L,O’Reilly S Y,et al.Igneous zircon:trace element composition as an indicator of source rock type[J].Contributions to Mineralogy and Petrology,2002,143(5):602-622.
[9]Hoskin P W O,Schaltegger U.The composition of zircon and igneous and metamorphic petrogenesis[J].Reviews in Mineralogy and Geochemistry,2003,53(1):27-62.
[10]李献华,李武显,李正祥.再论南岭燕山早期花岗岩的成因类型与构造意义[J].科学通报,2007,52(9):981-991.LI Xian-hua,LI Wu-xian,LI Zheng-xiang.On the genetic classification and tectonic implications of the Early Yanshannian granitoids in the Nanling Range,South China[J].Chinese Science Bulletin,2007,52(9):981-991.
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[13]Miller C F,Mcdowell S M,Mapes R W.Hot and cold granites?implications of zircon saturation temperatures and preservation of inheritance[J].Geology,2003,31(6):529-532.
[14]King P L,White A J R,Chappell B W,et al.Characterization and origin of aluminous A-type granites of the Lachlan fold belt,southeastern Australia[J].Journal of Petrology,1997,38(3):371-391.
[15]Rapp R P,Shimizu N,Norman M D,et al.Reaction between slab-derived melts and peridotite in the mantle wedge:experimental constraints at 3.8 GPa[J].Chemical Geology,1999,160(4):335-356.
[16]Rudnick R L,Gao S.Composition of the continental crust[M]//Rudnick R L.The crust,treaties on geochemistry.Oxford:Elsevier Pergamon,2003:1-64.
[17]Sun S S,Mcdonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes[J].Geological Society of London Special Publications,1989,42:313-345.
[18]Zhou X M,Li W X.Origin of Late Mesozoic igneous rocks in southeastern China:implications for lithosphere subduction and underplating of mafic magmas[J].Tectonophysics,2000,326:269-287.
[19]吴福元,杨进辉,张艳斌,等.辽西东南部中生代花岗岩时代[J].岩石学报,2006,22(2):315-325.WU Fu-yuan,YANG Jin-hui,ZHANG Yan-bin,et al.emplacement ages of the mesozoic granites in southeastern part of the western Liaoning Province[J].Acta Petrologica Sinica,2006,22(2):315-325.
[20]Li X H,Chung S L,Zhou H,et al.Jurassic intraplate magmatism in southern Hunan-eastern Guangxi:40Ar/39Ar dating,geochemistry,Sr-Nd isotopes and implications for the tectonic evolution of SE China[J].Geological Society of London Special Publications,2004,226:193-225.
[21]陈斌,田伟,翟明国,等.太行山和华北其它地区中生代岩浆作用的锆石U-Pb年代学和地球化学特征及其岩浆成因和地球动力学意义[J].岩石学报,2005,21(1):13-24.CHEN Bin,TIAN Wei,ZHAI Ming-guo,et al.Zircon U-Pb geochronology and geochemistry of the Mesozoic magmatism in the Taihang Mountains and other places of the North China craton,with implications for petrogenesis and geodynamic setting[J].Acta Petrologica Sinica,2005,21(1):13-24.
[22]杨进辉,吴福元,柳小明,等.辽东半岛小黑山岩体成因及其地质意义:锆石U-Pb年龄和铪同位素证据[J].矿物岩石地球化学通报,2007,26(1):29-43.YANG Jin-hui,WU Fu-yuan,LIU Xiao-ming,et al.Petrogenesis and geological significance of the Jurassic Xiaoheishan pluton in the Liaodong peninsula,East China:in-situ zircon U-Pb dating and Hf isotopic analysis[J].Bulletin of Mineralogy,Petrology and Geochemistry,2007,26(1):29-43.
[23]邱家骧.开合构造与岩浆活动[J].地质通报,2004,23(3):222-231.QIU Jia-xiang.Opening-closing tectonics and magmatic activity[J].Geological Bulletin of China,2004,23(3):222-231.
[24]Salters V J M,Hart S R.The mantle sources of ocean ridges,island and arcs:the Hf-isotope connection[J].Earth and Planetary Science Letters,1991,104(2/4):364-380.
[25]杨言辰,韩世炯,孙德有,等.小兴安岭—张广才岭成矿带斑岩型钼矿床岩石地球化学特征及其年代学研究[J].岩石学报,2012,28(2):379-390.YANG Yan-chen,HAN Shi-jiong,SUN De-you,et al.Geological and geochemical features and geochronology of porphyry molybdenum deposits in the Lesser Xing’an Range-Zhangguangcai Range metallogenic belt[J].Acta Petrologica Sinica,2012,28(2):379-390.
[26]王成辉,松权衡,王登红,等.吉林大黑山超大型钼矿辉钼矿铼-锇同位素定年及其地质意义[J].岩矿测试,2009,28(3):269-273.WANG Cheng-hui,SONG Quan-heng,WANG Denghong,et al.Re-Os isotopic dating of molybodenite from the Daheishan molybdenum deposit of Jilin Province and its geological significance[J].Rock and Mineral Analysis,2009,28(3):269-273.
[27]李立兴,松权衡,王登红,等.吉林福安堡钼矿中辉钼矿铼-锇同位素定年及成矿作用探讨[J].岩矿测试,2009,28(3):283-287.LI Li-xing,SONG Quan-heng,WANG Deng-hong,et al.Re-Os isotopic dating of molybodenite from the Fu’anpu molybdenum deposit of Jilin Province and discussion on its metallogenesis[J].Rock and Mineral Analysis,2009,28(3):283-287.
[2]孙德有,铃木和博,吴福元,等.吉林省南部荒沟山地区中生代花岗岩CHIME定年[J].地球化学,2005,34(4):305-314.SUN De-you,Suzuki K,WU Fu-yuan,et al.CHIME dating and its application for Mesozoic granites of Huanggoushan,Jilin Province[J].Geochimica,2005,34(4):305-314.
[3]秦亚,梁一鸿,胡兆初,等.吉林南部荒沟山地区侏罗纪花岗岩地球化学特征及构造意义[J].成都理工大学学报:自然科学版,2013,40(1):97-105.QIN Ya,LIANG Yi-hong,HU Zhao-chu,et al.Geochemical characteristics and tectonic significance of Jurassic granites in Huanggoushan area,south of Jilin,China[J].Journal of Chengdu University of Technology:Science and Technology Edition,2013,40(1):97-105.
[4]王速,邢树文.吉林省浑江市荒沟山区花岗岩成因类型探讨[J].吉林地质,1994,13(2):36-41.WANG Su,XING Shu-wen.A preliminary study on genetic types of granites in the Huanggou Mountain region,Hunjiang City,Jilin Province[J].Jilin Geology,1994,13(2):36-41.
[5]王诗元,范纪璋,王淼,等.吉林老岭成矿带金矿综合信息找矿模型[J].吉林大学学报:地球科学版,2008,38(2):211-216.WANG Shi-yuan,FAN Ji-zhang,WANG Miao,et al.The ore-prospecting model of gold deposits in the Laoling metallegenic belt[J].Journal of Jilin University:Earth Science Edition,2008,38(2):211-216.
[6]候可军,李延河,田有荣.LA-MC-ICP-MS锆石微区原位U-Pb定年技术[J].矿床地质,2009,28(4):481-492.HOU Ke-jun,LI Yan-he,TIAN You-rong.In situ U-Pb zircon dating using laser ablation-multi ion counting-ICP-MS[J].Mineral Desposits,2009,28(4):481-492.
[7]Liu Y S,Hu Z C,Gao S,et al.In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology,2008,257(1/2):34-43.
[8]Belousova E A,Griffin W L,O’Reilly S Y,et al.Igneous zircon:trace element composition as an indicator of source rock type[J].Contributions to Mineralogy and Petrology,2002,143(5):602-622.
[9]Hoskin P W O,Schaltegger U.The composition of zircon and igneous and metamorphic petrogenesis[J].Reviews in Mineralogy and Geochemistry,2003,53(1):27-62.
[10]李献华,李武显,李正祥.再论南岭燕山早期花岗岩的成因类型与构造意义[J].科学通报,2007,52(9):981-991.LI Xian-hua,LI Wu-xian,LI Zheng-xiang.On the genetic classification and tectonic implications of the Early Yanshannian granitoids in the Nanling Range,South China[J].Chinese Science Bulletin,2007,52(9):981-991.
[11]Watson E B.Zircon saturation in felsic liquids:experimental results and applications to trace element geochemistry[J].Contributions to Mineralogy and Petrology,1979,70(4):407-419.
[12]Watson E B,Harrison T M.Zircon saturation revisited:temperature and composition effects in a variety of crustal magma types[J].Earth and Planetary Science Letters,1983,64(2):295-304.
[13]Miller C F,Mcdowell S M,Mapes R W.Hot and cold granites?implications of zircon saturation temperatures and preservation of inheritance[J].Geology,2003,31(6):529-532.
[14]King P L,White A J R,Chappell B W,et al.Characterization and origin of aluminous A-type granites of the Lachlan fold belt,southeastern Australia[J].Journal of Petrology,1997,38(3):371-391.
[15]Rapp R P,Shimizu N,Norman M D,et al.Reaction between slab-derived melts and peridotite in the mantle wedge:experimental constraints at 3.8 GPa[J].Chemical Geology,1999,160(4):335-356.
[16]Rudnick R L,Gao S.Composition of the continental crust[M]//Rudnick R L.The crust,treaties on geochemistry.Oxford:Elsevier Pergamon,2003:1-64.
[17]Sun S S,Mcdonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes[J].Geological Society of London Special Publications,1989,42:313-345.
[18]Zhou X M,Li W X.Origin of Late Mesozoic igneous rocks in southeastern China:implications for lithosphere subduction and underplating of mafic magmas[J].Tectonophysics,2000,326:269-287.
[19]吴福元,杨进辉,张艳斌,等.辽西东南部中生代花岗岩时代[J].岩石学报,2006,22(2):315-325.WU Fu-yuan,YANG Jin-hui,ZHANG Yan-bin,et al.emplacement ages of the mesozoic granites in southeastern part of the western Liaoning Province[J].Acta Petrologica Sinica,2006,22(2):315-325.
[20]Li X H,Chung S L,Zhou H,et al.Jurassic intraplate magmatism in southern Hunan-eastern Guangxi:40Ar/39Ar dating,geochemistry,Sr-Nd isotopes and implications for the tectonic evolution of SE China[J].Geological Society of London Special Publications,2004,226:193-225.
[21]陈斌,田伟,翟明国,等.太行山和华北其它地区中生代岩浆作用的锆石U-Pb年代学和地球化学特征及其岩浆成因和地球动力学意义[J].岩石学报,2005,21(1):13-24.CHEN Bin,TIAN Wei,ZHAI Ming-guo,et al.Zircon U-Pb geochronology and geochemistry of the Mesozoic magmatism in the Taihang Mountains and other places of the North China craton,with implications for petrogenesis and geodynamic setting[J].Acta Petrologica Sinica,2005,21(1):13-24.
[22]杨进辉,吴福元,柳小明,等.辽东半岛小黑山岩体成因及其地质意义:锆石U-Pb年龄和铪同位素证据[J].矿物岩石地球化学通报,2007,26(1):29-43.YANG Jin-hui,WU Fu-yuan,LIU Xiao-ming,et al.Petrogenesis and geological significance of the Jurassic Xiaoheishan pluton in the Liaodong peninsula,East China:in-situ zircon U-Pb dating and Hf isotopic analysis[J].Bulletin of Mineralogy,Petrology and Geochemistry,2007,26(1):29-43.
[23]邱家骧.开合构造与岩浆活动[J].地质通报,2004,23(3):222-231.QIU Jia-xiang.Opening-closing tectonics and magmatic activity[J].Geological Bulletin of China,2004,23(3):222-231.
[24]Salters V J M,Hart S R.The mantle sources of ocean ridges,island and arcs:the Hf-isotope connection[J].Earth and Planetary Science Letters,1991,104(2/4):364-380.
[25]杨言辰,韩世炯,孙德有,等.小兴安岭—张广才岭成矿带斑岩型钼矿床岩石地球化学特征及其年代学研究[J].岩石学报,2012,28(2):379-390.YANG Yan-chen,HAN Shi-jiong,SUN De-you,et al.Geological and geochemical features and geochronology of porphyry molybdenum deposits in the Lesser Xing’an Range-Zhangguangcai Range metallogenic belt[J].Acta Petrologica Sinica,2012,28(2):379-390.
[26]王成辉,松权衡,王登红,等.吉林大黑山超大型钼矿辉钼矿铼-锇同位素定年及其地质意义[J].岩矿测试,2009,28(3):269-273.WANG Cheng-hui,SONG Quan-heng,WANG Denghong,et al.Re-Os isotopic dating of molybodenite from the Daheishan molybdenum deposit of Jilin Province and its geological significance[J].Rock and Mineral Analysis,2009,28(3):269-273.
[27]李立兴,松权衡,王登红,等.吉林福安堡钼矿中辉钼矿铼-锇同位素定年及成矿作用探讨[J].岩矿测试,2009,28(3):283-287.LI Li-xing,SONG Quan-heng,WANG Deng-hong,et al.Re-Os isotopic dating of molybodenite from the Fu’anpu molybdenum deposit of Jilin Province and discussion on its metallogenesis[J].Rock and Mineral Analysis,2009,28(3):283-287.