衡阳盆地南缘灯草坪花岗闪长斑岩地质特征及其与铜多金属矿成矿的关系
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摘要
灯草坪岩体位于衡阳盆地西南缘,出露面积约0. 67km~2,为燕山晚期花岗闪长斑岩体。文章通过对灯草坪岩体进行主微量元素地球化学研究,讨论了其与周边铜铅锌矿床成矿的关系。分析显示灯草坪岩体具有高(过)铝、高硅、高K_2O/Na_2O和高Fe_2O_3/FeO比值,为镁质、高钾钙碱性岩系,W、Bi、Ag、As、Sb等元素丰度较高,ΣREE值总量中等,轻稀土较富集,δEu值接近1,为铕正常型,δCe值0. 84,具铈的弱的负异常。其岩石学、元素地球化学特征反映岩体形成于碰撞后环境,深部地壳或地幔物质参与了成岩-成矿作用,表明衡阳盆地中生代有色金属成矿活动一直持续至白垩纪。
The Dengcaoping rock mass,the late Yanshan granodiorite porphyry,is located in the southwest margin of the Hengyang basin,with exposed area of about 0. 67 km~2. In this paper,the geochemistry of the main trace elements in the Dengcaoping rock mass was studied,and the relationship with the mineralization of the surrounding copper lead zinc deposits was discussed. The analysis shows that the Dengcaoping rock mass has high( excess) aluminum,high silicon,high K_2O/Na_2O and high Fe_2O_3/FeO ratio. It is a magnesian and high potassium calc alkaline rock series. It is rich in W,Bi,Ag,As,Sb and other elements. The total rare earth element contents are medium with enriched light REE. The δEu is close to 1,which is the normal type of europium. The δCe is 0. 84,indicating a weak negative anomaly of cerium. Its petrological and geochemical characteristics indicate that the rock mass was formed in the post collisional environment,and that deep crustal or mantle materials involved in petrogenesis and mineralization. The Mesozoic non-ferrous metallogenic activities in the Hengyang basin are inferred to last until the Cretaceous period.
The Dengcaoping rock mass,the late Yanshan granodiorite porphyry,is located in the southwest margin of the Hengyang basin,with exposed area of about 0. 67 km~2. In this paper,the geochemistry of the main trace elements in the Dengcaoping rock mass was studied,and the relationship with the mineralization of the surrounding copper lead zinc deposits was discussed. The analysis shows that the Dengcaoping rock mass has high( excess) aluminum,high silicon,high K_2O/Na_2O and high Fe_2O_3/FeO ratio. It is a magnesian and high potassium calc alkaline rock series. It is rich in W,Bi,Ag,As,Sb and other elements. The total rare earth element contents are medium with enriched light REE. The δEu is close to 1,which is the normal type of europium. The δCe is 0. 84,indicating a weak negative anomaly of cerium. Its petrological and geochemical characteristics indicate that the rock mass was formed in the post collisional environment,and that deep crustal or mantle materials involved in petrogenesis and mineralization. The Mesozoic non-ferrous metallogenic activities in the Hengyang basin are inferred to last until the Cretaceous period.
引文
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Huang Jinchuan,Peng Jiantang,Yang Jiehua,Xu Chunxia,Hu Sibai.2015.Geochemistry and genesis of the Shuikoushan granodiorite in Hunan,South China[J].Geochimica,44(2):131-144(in Chinese with English abstract).
Le Maitre R W.1989.A classification of igneous rocks and glossary of terms[J].Oxford:Blackwell Sci.Pub:1-193.
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Li Xianhua,Li Zhengxiang,Li Wuxian,Liu Ying,Yuan Chao,Wei Guangjian,Qi Changshi.2007.U-Pb zircon,geo-chemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I-and A-type granites from central Guangdong,SE China:A major igneous event in response to foundering of a subducted flat-slab?[J].Lithos,96(1):186-204.
Ma Liyan,Lu Yuanfa,Mei Yuping,Chen Xiqing.2006.Zircon SHRIMPU-Pb dating of granodiorite from Shuikoushan ore-field,Hunan Province and its geological significance[J].Acta Petrol Sinca,22(10):2475-2482(in Chinese with English abstract).
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Monecke T,Kempe U,G9tze J.2002.Genetic significance of the trace element content in metamorphic and hydrothermal quartz:A reconnaissance study[J].Earth and Planetary Science Letters,202:709-724.
Saunders A D,Norry M J,Tarney J.1988.Origin of MORB and chemically depleted mantle reservoirs:Trace element constraints[J].Jour Petrol(Special Volume),(1)::415-445.
Sun S S,Mcdonough W F.1989.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].Geological Society of London Special Publications,42:313-345.
Wang Xianbin,Wu Jing,Cai Minghai,Chen Hao Wen,Xi Dafei,Liu Xiang.2013.Geochemical characteristics and Sr-Nd-Hf isotopic compositon of the Yanshanian granite porphyry in the Hehuaping area of Southern Hunan and their geological significance[J].Geology and Exploration,49(2):300-312(in Chinese with English abstract).
Wang Yuejun,Fan Weiming,Guo Feng.2003.Geochemistry of early Mesozoic potassium-rich diorites-granodiorites in Southeastern Hunan Province,South China:Petrogenesis and tectonic implications[J].Geochem J,37(4):427-448.
Weaver B L.1991.The origin of ocean island basalt end-member compositions:trace element and isotopic constraints[J].Earth Planet.Sci.,104:3810.
Xie Wenan,Xie Linglin.1991.A introduction to nonferrous metallic deposits in Hunan Province[J].Geology and Exploration,27(7):1-27(in Chinese withEnglish abstract).
Xu Keqin,Sun Nai,Wang Dezi,Liu Changshi,Chen Kerong.1982.Genetic series of granitic rocks in Southeastern China[J].Acta Petrologica et Mineralogica,1(02):1-12(in Chinese with English abstract).
Zeng Xianke,Liu Xu,LüYuming,Qin Jinning,Zhang Songfang,Wang Huiyuan,Zhu Wuquan,Zhu Chengsheng.2012.Copper lead mineralization and charcteristics of Dengping area,Changning City[J].Journal of University of South China(Science and Technology),26(03):47-53(in Chinese with English abstract).
Zhou Xinmin.2007.Geneisis of granite and lithospheric dynamics evolution of Late Mesozoic in Naming[M].Beijing:Science Press:179-195(in Chinese with English abstract).
Zhu Jinchu,Shen Weizhou,Liu Changshi,Xu Shijin.1990.Nd-Sr isotopic characteristics and genetic discussion of Mesozoic granitoids of synexis series in South China[J].Acta Perol Mineral,9(2):97-105(in Chinese with English abstract).
Zuo Changhu,Qu Jinbao,Zuo Zhongyong,Zuo Zong,Li Depeng.2016.Genesis of breccia and its relationship with mineralization in the Kangjiawan lead-zinc deposit of Changning County,Hunan Province[J].Geology and Exploration,52(2):251-260(in Chinese with English abstract).
黄金川,彭建堂,阳杰华,徐春霞,胡思柏.2015.湖南水口山花岗闪长岩的地球化学特征及成因[J].地球化学,44(2):131-144.
李金冬.2005.湘东南地区中生代构造-岩浆-成矿动力学研究[D].北京:中国地质大学(北京):1-145.
黎彤,饶纪龙.1963.中国岩浆岩的平均化学成分[J].地质学报,43(3):271-280.
马丽艳,路远发,梅玉萍,陈希清.2006.湖南水口山矿区花岗闪长岩中的锆石SHRIMP U-Pb定年及其地质意义[J].岩石学报,22(10):2475-2482..
王显彬,吴静,蔡明海,陈豪文,谢达飞,刘翔.2013.湘南荷花坪地区燕山期花岗斑岩的地球化学、Sr-Nd-Hf同位素特征及其地质意义[J].地质与勘探,49(2):300-312.
谢文安,谢玲琳.1991.湖南省有色金属矿床概论[J].地质与勘探,27(7):1-27.
徐克勤,孙鼐,王德滋,刘昌实,陈克荣.1982.华南两类不同成因花岗岩岩石学特征[J].岩矿测试,1(02):1-12.
曾宪科,刘旭,吕宇明,覃金宁,张宋芳,王慧媛,朱武泉,朱成生.2012.常宁市灯坪地区铜铅锌成矿作用及其特征[J].南华大学学报(自然科学版),26(03):47-53.
周新民.2007.南岭地区晚中生代花岗岩成因与岩石圈动力学演化[M].北京:科学出版社:179-195.
朱金初,沈渭州,刘昌实,徐士进.1990.华南中生代同熔系列花岗岩类的Nd-Sr同位素特征及成因讨论[J].岩石矿物学杂志,9(2):97-105.
左昌虎,屈金宝,左中勇,左宗,李德鹏.2016.湖南常宁康家湾铅锌矿床角砾岩成因及其与成矿的关系[J].地质与勘探,52(2):251-260.
(1)湖南省地质矿产局. 1988.湖南省区域地质志[R].
(2)湖南省地质调查院. 2005. 1:25万衡阳市幅(G49C002004)区域地质调查报告[R].
Chappell B W,White A J R.1974.Two contrasting granite types[J].Pac Geol,8:173-174.
Gilder S A,Gill J,Coe R S,Zhao Xixi,Liu Zhongwei,Wang Genxian,Yuan Kuirong,Liu Wenlong,Kuang Guodun,Wu Haoruo.1996.Isotopic and paleomagnetic constraints on the Mesozoic tectonic evolution of south China[J].Geophys Res:Solid Earth(1978-2012),101(B7):16137-16154.
Harris N B W,Pearce J A,Tindle A G.1986.Geochemical characteristics of collision-zone magmatism[J].Geological Society of London Special Publications,19(5):67-81.
Henderson P.1984.Rare earth element geochemistry[M].Amsterdam:Elsevier Science Publishers:467-499.
Huang Jinchuan,Peng Jiantang,Yang Jiehua,Xu Chunxia,Hu Sibai.2015.Geochemistry and genesis of the Shuikoushan granodiorite in Hunan,South China[J].Geochimica,44(2):131-144(in Chinese with English abstract).
Le Maitre R W.1989.A classification of igneous rocks and glossary of terms[J].Oxford:Blackwell Sci.Pub:1-193.
Li Jindong.2005.Mesozoic tectonic-magma-mineralization in Southeastern Hunan Province[D].Beijing:China University of Geosciences(Beijing):1-145(in Chinese with English abstract).
Li Tong,Rao Jilong.1963.The average chemical compositon of igeous rocks in China[J].Acta Geol Sinica,43(3):271-280(in Chinese with English abstract).
Li Xianhua,Li Zhengxiang,Li Wuxian,Liu Ying,Yuan Chao,Wei Guangjian,Qi Changshi.2007.U-Pb zircon,geo-chemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I-and A-type granites from central Guangdong,SE China:A major igneous event in response to foundering of a subducted flat-slab?[J].Lithos,96(1):186-204.
Ma Liyan,Lu Yuanfa,Mei Yuping,Chen Xiqing.2006.Zircon SHRIMPU-Pb dating of granodiorite from Shuikoushan ore-field,Hunan Province and its geological significance[J].Acta Petrol Sinca,22(10):2475-2482(in Chinese with English abstract).
Middlemost E A.1994.Naming materials in the magma/igneous rock system[J].Earth Sci Rev,37(3):215-224.
Monecke T,Kempe U,G9tze J.2002.Genetic significance of the trace element content in metamorphic and hydrothermal quartz:A reconnaissance study[J].Earth and Planetary Science Letters,202:709-724.
Saunders A D,Norry M J,Tarney J.1988.Origin of MORB and chemically depleted mantle reservoirs:Trace element constraints[J].Jour Petrol(Special Volume),(1)::415-445.
Sun S S,Mcdonough W F.1989.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].Geological Society of London Special Publications,42:313-345.
Wang Xianbin,Wu Jing,Cai Minghai,Chen Hao Wen,Xi Dafei,Liu Xiang.2013.Geochemical characteristics and Sr-Nd-Hf isotopic compositon of the Yanshanian granite porphyry in the Hehuaping area of Southern Hunan and their geological significance[J].Geology and Exploration,49(2):300-312(in Chinese with English abstract).
Wang Yuejun,Fan Weiming,Guo Feng.2003.Geochemistry of early Mesozoic potassium-rich diorites-granodiorites in Southeastern Hunan Province,South China:Petrogenesis and tectonic implications[J].Geochem J,37(4):427-448.
Weaver B L.1991.The origin of ocean island basalt end-member compositions:trace element and isotopic constraints[J].Earth Planet.Sci.,104:3810.
Xie Wenan,Xie Linglin.1991.A introduction to nonferrous metallic deposits in Hunan Province[J].Geology and Exploration,27(7):1-27(in Chinese withEnglish abstract).
Xu Keqin,Sun Nai,Wang Dezi,Liu Changshi,Chen Kerong.1982.Genetic series of granitic rocks in Southeastern China[J].Acta Petrologica et Mineralogica,1(02):1-12(in Chinese with English abstract).
Zeng Xianke,Liu Xu,LüYuming,Qin Jinning,Zhang Songfang,Wang Huiyuan,Zhu Wuquan,Zhu Chengsheng.2012.Copper lead mineralization and charcteristics of Dengping area,Changning City[J].Journal of University of South China(Science and Technology),26(03):47-53(in Chinese with English abstract).
Zhou Xinmin.2007.Geneisis of granite and lithospheric dynamics evolution of Late Mesozoic in Naming[M].Beijing:Science Press:179-195(in Chinese with English abstract).
Zhu Jinchu,Shen Weizhou,Liu Changshi,Xu Shijin.1990.Nd-Sr isotopic characteristics and genetic discussion of Mesozoic granitoids of synexis series in South China[J].Acta Perol Mineral,9(2):97-105(in Chinese with English abstract).
Zuo Changhu,Qu Jinbao,Zuo Zhongyong,Zuo Zong,Li Depeng.2016.Genesis of breccia and its relationship with mineralization in the Kangjiawan lead-zinc deposit of Changning County,Hunan Province[J].Geology and Exploration,52(2):251-260(in Chinese with English abstract).
黄金川,彭建堂,阳杰华,徐春霞,胡思柏.2015.湖南水口山花岗闪长岩的地球化学特征及成因[J].地球化学,44(2):131-144.
李金冬.2005.湘东南地区中生代构造-岩浆-成矿动力学研究[D].北京:中国地质大学(北京):1-145.
黎彤,饶纪龙.1963.中国岩浆岩的平均化学成分[J].地质学报,43(3):271-280.
马丽艳,路远发,梅玉萍,陈希清.2006.湖南水口山矿区花岗闪长岩中的锆石SHRIMP U-Pb定年及其地质意义[J].岩石学报,22(10):2475-2482..
王显彬,吴静,蔡明海,陈豪文,谢达飞,刘翔.2013.湘南荷花坪地区燕山期花岗斑岩的地球化学、Sr-Nd-Hf同位素特征及其地质意义[J].地质与勘探,49(2):300-312.
谢文安,谢玲琳.1991.湖南省有色金属矿床概论[J].地质与勘探,27(7):1-27.
徐克勤,孙鼐,王德滋,刘昌实,陈克荣.1982.华南两类不同成因花岗岩岩石学特征[J].岩矿测试,1(02):1-12.
曾宪科,刘旭,吕宇明,覃金宁,张宋芳,王慧媛,朱武泉,朱成生.2012.常宁市灯坪地区铜铅锌成矿作用及其特征[J].南华大学学报(自然科学版),26(03):47-53.
周新民.2007.南岭地区晚中生代花岗岩成因与岩石圈动力学演化[M].北京:科学出版社:179-195.
朱金初,沈渭州,刘昌实,徐士进.1990.华南中生代同熔系列花岗岩类的Nd-Sr同位素特征及成因讨论[J].岩石矿物学杂志,9(2):97-105.
左昌虎,屈金宝,左中勇,左宗,李德鹏.2016.湖南常宁康家湾铅锌矿床角砾岩成因及其与成矿的关系[J].地质与勘探,52(2):251-260.
(1)湖南省地质矿产局. 1988.湖南省区域地质志[R].
(2)湖南省地质调查院. 2005. 1:25万衡阳市幅(G49C002004)区域地质调查报告[R].