粤东金坑锡铜多金属矿区花岗岩锆石U-Pb年龄和辉钼矿Re-Os年龄及其地质意义
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摘要
广东揭西县金坑铜锡多金属矿床位于粤东地区西北部莲花山断裂带南西段,是粤东锡铜多金属成矿带近年来发现的一处中—大型铜锡铅锌多金属矿床。采用LA-ICP-MS锆石U-Pb法和辉钼矿Re-Os法对矿区与成矿有关的细粒花岗岩及与锡石共生的辉钼矿进行定年,获得该矿床成岩年龄为(141.0±0.3)Ma,辉钼矿Re-Os同位素年龄为(141.3±1.0)Ma,两者年龄接近,表明成岩成矿关系最为密切。并结合细粒花岗岩主微量元素分析结果表明细粒花岗岩具有高硅富碱特点,属于高分异的I型花岗岩,这种岩浆演化末端产物细粒花岗岩有利于成矿金属元素富集,为本区成矿提供巨量的物源与热源。结合成岩成矿年龄研究与主微量分析,初步认为成矿地质体为早白垩世细粒花岗岩,并探讨该矿床的成因及其成矿动力学背景。
The gold pit copper tin polymetallic deposit in Jiexi county,Guangdong Province is located in the south west section of Lianhuashan fault zone in the eastern part of Guangdong Province.It is a large copper-tin-lead-zinc polymetallic deposit found in the copper-polymetallic metallogenic belt in eastern Guangdong Province.The LA-ICP-MS U-Pb zircon dating shown that the fine-grained granite's diagenetic age is 141.0± 0.3 Ma,and the Re-Os isotopic measurement on molybdenite which are associated with cassiterite and arsenopyrite shown that the mineralization age is 141.0±1.0 Ma,and the diagenetic relationship is most closely related. The major and trace elements also shown that fine-granite with high silica and alkali characteristics and was a highly fractionated I-type granitoids and providing a huge amount of ore-forming substances and heat source.Based on the diagenetic age and the mineralization age and the major and trace elements analysis,the paper preliminary account that the mineralization geological body were most likely the early cretaceous fine-grained granite.
The gold pit copper tin polymetallic deposit in Jiexi county,Guangdong Province is located in the south west section of Lianhuashan fault zone in the eastern part of Guangdong Province.It is a large copper-tin-lead-zinc polymetallic deposit found in the copper-polymetallic metallogenic belt in eastern Guangdong Province.The LA-ICP-MS U-Pb zircon dating shown that the fine-grained granite's diagenetic age is 141.0± 0.3 Ma,and the Re-Os isotopic measurement on molybdenite which are associated with cassiterite and arsenopyrite shown that the mineralization age is 141.0±1.0 Ma,and the diagenetic relationship is most closely related. The major and trace elements also shown that fine-granite with high silica and alkali characteristics and was a highly fractionated I-type granitoids and providing a huge amount of ore-forming substances and heat source.Based on the diagenetic age and the mineralization age and the major and trace elements analysis,the paper preliminary account that the mineralization geological body were most likely the early cretaceous fine-grained granite.
引文
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陈少青.2016.广东金坑矿区动力变质构造蚀变带特征与成矿关系[J].矿产勘查,7(2):291-299.
古润平,卜安,陈少青.2009.广东省揭西金坑铜锡铅锌矿区矿床地质特征与远景预测[J].资源调查与环境,30(2):109-114.
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黄玉昆,张珂.1990.广东莲花山断裂带的新构造运动特征[J].华南地震,(2):25-34.
李晶,孙亚莉,何克,等.2010.辉钼矿Re-Os同位素定年方法的改进与应用[J].岩石学报,26(2):642-648.
李晓峰,Watanabe Yasushi,华仁民,等.2008.华南地区中生代Cu-(Mo)-W-Sn矿床成矿作用与洋岭/转换断层俯冲[J].地质学报,82(5):625-640.
梁敦杰,谢佑才.1988.广东莲花山断裂带西南段地质构造特征[J].地质通报,(2):32-37.
林德松,王开选.1987.栗木矿田花岗岩型锡矿床成矿特征[J].矿产与地质,(2):3-11.
刘鹏,程彦博,毛景文,等.2015.粤东田东钨锡多金属矿床花岗岩锆石U-Pb年龄、Hf同位素特征及其意义[J].Acta Geologica Sinica,89(7):1244-1257.
刘鹏,程彦博,毛景文,等.2015.粤东田东钨锡多金属矿床花岗岩锆石U-Pb年龄、Hf同位素特征及其意义[J].Acta Geologica Sinica,89(7):1244-1257.
刘义茂.1983.论花岗岩类岩浆的分异作用问题[J].矿物岩石地球化学通报,2(3):21-23.
路远发.1995.钟丘洋次火山岩型铜矿床的地质地球化学特征[J].矿产与地质,(3):145-152.
毛景文,谢桂青,郭春丽,等.2008.华南地区中生代主要金属矿床时空分布规律和成矿环境[J].高校地质学报,14(4):510-526.
毛景文,谢桂青,李晓峰,等.2004.华南地区中生代大规模成矿作用与岩石圈多阶段伸展[J].地学前缘,11(1):45-55.
钱龙兵.2015.广东揭西县金坑锡铜多金属矿床成矿作用特征与找矿预测研究[D].中国地质大学,(10).
秦德先,黎应书,谈树成,等.2006.云南个旧锡矿的成矿时代[J].地质科学,41(1):122-132.
邱元禧,邱津松,李建超,等.1991.广东莲花山断裂带中、新生代多期复合变形变质带的基本特征及其形成机制的探讨[J].地质力学学报,93-106.
王德滋,沈渭洲.2003.中国东南部花岗岩成因与地壳演化[J].地学前缘,10(3):209-220.
王涌泉.2015.广东金坑矿区马山区段矿体地质特征及成因[J].现代矿业,(7):106-107.
徐晓春,岳书伦.1994.粤东地区锡多金属矿床的成矿年龄及矿床成因[C]//中国矿物学岩石学地球化学研究新进展学术交流会.
颜伦明,王核,等.2016.广东莲花山断裂带南西段锡铜多金属矿整装勘查区关键基础地质研究及专项填图与技术应用示范报告[R].广东省有色金属地质局.
张岳桥,徐先兵,贾东,等.2009.华南早中生代从印支期碰撞构造体系向燕山期俯冲构造体系转换的形变记录[J].地学前缘,(1):234-247.
章振根,李锡林,林学农,等.1983.3B型花岗岩---一种与锡有关的花岗岩[J].地球与环境,(4):60-61+7.
钟才文.2011.厚婆坳矿区矿床矿体特征及南区的找矿前景分析[J].中国科技信息,(14):79-80.
周立功.1991.广东莲花山断裂带的现今活动研究[R].中国地质科学院562综合大队集刊.
周新民.2003.对华南花岗岩研究的若干思考[J].高校地质学报,9(4):556-565.
周新民.2003.对华南花岗岩研究的若干思考[J].高校地质学报,9(4):556-565.
J B Whalen,周泰禧.1989.A型花岗岩的地球化学特征、鉴别标志和岩石成因[J].地球与环境,(2):22-29.
Ludwig K R.2003.Isoplot 3.00:A geochronological toolkit for microsoft excel[M].Berkeley Geochronology Center:Special Publication,
Maitre R W.1989.A Classification of igneous rocks and glossary of terms[M].Oxford U K:Blackwell Scientific Publication,589-637.
Peccerillo A,Taylor S R.1976.Geochemistry of Eocene Calc Alkaline Volcanic Rocks from Kastamonu Area,Northern Turkey.Contribution to Mineralogy and Petrology,58:63-81.
Sun S S,Mc Donough W F.1989.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes[M].London:Geol Soci Spec Pub,313-345.
Yuan Honglin,Gao shan,Liu Xiaoming,et al.2004.Accurate U-Pb age and trace element determination of zircon by laser abla-tion-inductively coupled plasma-mass spectrometry[J].Geostandards&Geoanalytical Research,28:353-370.
白玉珍,满发胜,倪守斌,等.1983.莲花山钨矿区K-Ar同位素地质年龄[J].地球化学,(2):133-139.
卜安.2014.广东省揭西县金坑铜锡铅锌矿床岩石特征及含矿性分析[J].矿产与地质,(3):330-333
蔡锦辉,陈永烈.1996.广东梅县玉水铜多金属矿床成矿时代[J].广东地质,(2):55-58.
陈少青.2016.广东金坑矿区动力变质构造蚀变带特征与成矿关系[J].矿产勘查,7(2):291-299.
古润平,卜安,陈少青.2009.广东省揭西金坑铜锡铅锌矿区矿床地质特征与远景预测[J].资源调查与环境,30(2):109-114.
郭春丽,郑佳浩,楼法生,等.2012.华南印支期花岗岩类的岩石特征、成因类型及其构造动力学背景探讨[J].大地构造与成矿学,36(3):457-472.
华仁民,陈培荣,张文兰,等.2005.论华南地区中生代3次大规模成矿作用[J].矿床地质,24(2):99-107.
黄玉昆,张珂.1990.广东莲花山断裂带的新构造运动特征[J].华南地震,(2):25-34.
李晶,孙亚莉,何克,等.2010.辉钼矿Re-Os同位素定年方法的改进与应用[J].岩石学报,26(2):642-648.
李晓峰,Watanabe Yasushi,华仁民,等.2008.华南地区中生代Cu-(Mo)-W-Sn矿床成矿作用与洋岭/转换断层俯冲[J].地质学报,82(5):625-640.
梁敦杰,谢佑才.1988.广东莲花山断裂带西南段地质构造特征[J].地质通报,(2):32-37.
林德松,王开选.1987.栗木矿田花岗岩型锡矿床成矿特征[J].矿产与地质,(2):3-11.
刘鹏,程彦博,毛景文,等.2015.粤东田东钨锡多金属矿床花岗岩锆石U-Pb年龄、Hf同位素特征及其意义[J].Acta Geologica Sinica,89(7):1244-1257.
刘鹏,程彦博,毛景文,等.2015.粤东田东钨锡多金属矿床花岗岩锆石U-Pb年龄、Hf同位素特征及其意义[J].Acta Geologica Sinica,89(7):1244-1257.
刘义茂.1983.论花岗岩类岩浆的分异作用问题[J].矿物岩石地球化学通报,2(3):21-23.
路远发.1995.钟丘洋次火山岩型铜矿床的地质地球化学特征[J].矿产与地质,(3):145-152.
毛景文,谢桂青,郭春丽,等.2008.华南地区中生代主要金属矿床时空分布规律和成矿环境[J].高校地质学报,14(4):510-526.
毛景文,谢桂青,李晓峰,等.2004.华南地区中生代大规模成矿作用与岩石圈多阶段伸展[J].地学前缘,11(1):45-55.
钱龙兵.2015.广东揭西县金坑锡铜多金属矿床成矿作用特征与找矿预测研究[D].中国地质大学,(10).
秦德先,黎应书,谈树成,等.2006.云南个旧锡矿的成矿时代[J].地质科学,41(1):122-132.
邱元禧,邱津松,李建超,等.1991.广东莲花山断裂带中、新生代多期复合变形变质带的基本特征及其形成机制的探讨[J].地质力学学报,93-106.
王德滋,沈渭洲.2003.中国东南部花岗岩成因与地壳演化[J].地学前缘,10(3):209-220.
王涌泉.2015.广东金坑矿区马山区段矿体地质特征及成因[J].现代矿业,(7):106-107.
徐晓春,岳书伦.1994.粤东地区锡多金属矿床的成矿年龄及矿床成因[C]//中国矿物学岩石学地球化学研究新进展学术交流会.
颜伦明,王核,等.2016.广东莲花山断裂带南西段锡铜多金属矿整装勘查区关键基础地质研究及专项填图与技术应用示范报告[R].广东省有色金属地质局.
张岳桥,徐先兵,贾东,等.2009.华南早中生代从印支期碰撞构造体系向燕山期俯冲构造体系转换的形变记录[J].地学前缘,(1):234-247.
章振根,李锡林,林学农,等.1983.3B型花岗岩---一种与锡有关的花岗岩[J].地球与环境,(4):60-61+7.
钟才文.2011.厚婆坳矿区矿床矿体特征及南区的找矿前景分析[J].中国科技信息,(14):79-80.
周立功.1991.广东莲花山断裂带的现今活动研究[R].中国地质科学院562综合大队集刊.
周新民.2003.对华南花岗岩研究的若干思考[J].高校地质学报,9(4):556-565.
周新民.2003.对华南花岗岩研究的若干思考[J].高校地质学报,9(4):556-565.
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