东昆仑骆驼峰地区中晚三叠世花岗岩年代学、地球化学及构造意义
|
摘要
骆驼峰地区位于东昆仑造山带昆北弧后裂陷带,其内发育大量记录古特提斯洋演化的岩浆岩。本文对该地区花岗闪长岩和钾长花岗岩进行了年代学和地球化学研究,用以限定古特提斯洋的构造演化。LA-ICP-MS锆石U-Pb测年结果表明花岗闪长岩形成于中三叠世(233Ma),钾长花岗岩形成于晚三叠世(218Ma)。花岗闪长岩和钾长花岗岩分属于中钾钙碱性-高钾钙碱性系列和钾玄岩系列,A/CNK值为0.92-1.02,具有偏铝质花岗岩类属性。两类岩石均具有负铕异常、稀土总量低、轻稀土明显分馏和铕弱异常的特点。花岗闪长岩富含大离子亲石元素、亏损高场强元素,具有火山弧花岗岩特征,为古特提斯洋俯冲消减作用的产物。钾长花岗岩具有相对较高Nb、Ta和Rb含量,显示出同碰撞花岗岩的特征,暗示古特提斯洋在早三叠已经闭合进入陆陆碰撞阶段。两类岩石记录了古特提斯洋俯冲到消亡的构造体制的转换。
The Luotuofeng area is located in the North arc back fracture zone of the eastern Kunlun orogenic belt,which contains a large number of magmatic rocks that record the evolution of the Paleo-Tethys Ocean.Geochronology and geochemistry of two types of granites(granodiorite and moyite) in this area are studied in order to define the tectonic evolution of the Paleo-Tethys Ocean.LA-ICP-MS zircon U-Pb dating shows that granodiorites(233 Ma) were formed in the middle Triassic,and the moyite(218 Ma) were formed in the late Triassic.The two type of rocks are high potassium calc-alkaline series,with a A/CNK value of 1.21 and 1.95,belonging to the meta aluminous granitoids.All of them are characterized by low total amount of rare earth elements,obvious fractionation of light rare earth and weak negative Eu anomaly.Granodiorite is rich in large ion lithophile elements and depleted high field strength elements.It has the characteristics of volcanic arc granite and is the product of subduction of the Paleo-Tethyan Ocean.Moyite have relatively high Nb,Ta and Rb contents,showing the characteristics of syn-collisional granites,suggesting that the Paleo-Tethyan Ocean closed into the land-land collision stage in the early Triassic.The two types of rocks record the transformation of the tectonic system from subduction to extinction of the Paleo-Tethyan Ocean.
The Luotuofeng area is located in the North arc back fracture zone of the eastern Kunlun orogenic belt,which contains a large number of magmatic rocks that record the evolution of the Paleo-Tethys Ocean.Geochronology and geochemistry of two types of granites(granodiorite and moyite) in this area are studied in order to define the tectonic evolution of the Paleo-Tethys Ocean.LA-ICP-MS zircon U-Pb dating shows that granodiorites(233 Ma) were formed in the middle Triassic,and the moyite(218 Ma) were formed in the late Triassic.The two type of rocks are high potassium calc-alkaline series,with a A/CNK value of 1.21 and 1.95,belonging to the meta aluminous granitoids.All of them are characterized by low total amount of rare earth elements,obvious fractionation of light rare earth and weak negative Eu anomaly.Granodiorite is rich in large ion lithophile elements and depleted high field strength elements.It has the characteristics of volcanic arc granite and is the product of subduction of the Paleo-Tethyan Ocean.Moyite have relatively high Nb,Ta and Rb contents,showing the characteristics of syn-collisional granites,suggesting that the Paleo-Tethyan Ocean closed into the land-land collision stage in the early Triassic.The two types of rocks record the transformation of the tectonic system from subduction to extinction of the Paleo-Tethyan Ocean.
引文
Andersen T.2002.Correction of common lead in U-Pb analyses that do not report 204 Pb[J].Chemical Geology,192(1):59-79.
Liu Y,Gao S,Hu Z,et al.2010.Continental and Oceanic Crust Recycling-induced Melt-Peridotite Interactions in the Trans-North China Orogen:U-Pb Dating,Hf Isotopes and Trace Elements in Zircons from Mantle Xenoliths[J].Journal of Petrology,51(1-2):537-571.
Liu Y,Hu Z,Gao S,et al.2008.In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology,257(1-2):0-43.
Ludwig K.2003.User's manual for isoplot 3.00:a geo-chronological toolkit for Microsoft Exccl[M].Berkeley Geochronology Center Special Publication.4:1-70.
Maniar,P.D.,Piccoli,P.M.1989.Tectonic discrimination of granitoids[J].Geol.Soc.Am.Bull.101:673-689.
Pearce,J.A.1996.Sources and settings of granitic rocks[J].Episodes.19:120-125.
Peccerillo,A.,Taylor,D.R.1976.Geochemistry of Eocene Calc-alkaline Volcanic Rocks from the Kastamonu Area,Northern Turkey[J].Contrib.Mineral.Petrol.58:63-81.
Sun,S.S.,Mc Donough,W.F.1989.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes.In:Saunders,A.D.,Norry,M.J.(Eds.),Magmatism in Ocean Basins[M].Geological Society of Special Publication,London:313-345.
Wilson,M.1989.Igneous Petrogenesis[M].Unwin Hyman,London:466.
Yang J S,Robinson P T,Jiang C F,et al.1996.Ophiolites of the Kunlun Mountains,China and their tectonic implications[J].Tectonophysics,258(1-4):0-231.
Yuan H,Gao S,Liu X,et al.2010.Accurate U-Pb Age and Trace Element Determinations of Zircon by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry[J].Geostandards&Geoanalytical Research,28(3):353-370.
白宜娜,孙丰月,钱烨,等.2016.青海东昆仑尕林格铁多金属矿床辉石闪长岩U-Pb年代学及地球化学特征[J].世界地质,35(01):17-27.
陈丹玲,刘良,车自成,等.2001.祁漫塔格印支期铝质A型花岗岩的确定及初步研究[J].地球化学,30(6):540-546.
陈静,谢智勇,李彬,等.2013.东昆仑拉陵灶火钼多金属矿床含矿岩体地质地球化学特征及其成矿意义[J].地质与勘探,49(05):813-824.
丰成友,李东生,屈文俊,等.2009.青海祁漫塔格索拉吉尔矽卡岩型铜钼矿床辉钼矿铼-锇同位素定年及其地质意义[J].岩矿测试,2009,28(03):223-227.
丰成友,王松,李国臣,等.2012.青海祁漫塔格中晚三叠世花岗岩:年代学、地球化学及成矿意义[J].岩石学报,28(02):665-678.
丰成友,王雪萍,苏晓峰,等.2011.青海祁漫塔格虎头崖铅锌多金属矿区年代学研究及地质意义[J].吉林大学学报(地),41(6):1806-1817.
高永宝,李文渊,马晓光,等.2012.东昆仑尕林格铁矿床成因年代学及Hf同位素制约[J].兰州大学学报(自然科学版),48(02):36-47.
高永宝,李文渊,钱兵,等.2014.东昆仑野马泉铁矿相关花岗质岩体年代学、地球化学及Hf同位素特征[J].岩石学报,2014,30(06):1647-1665.
郭正府,邓晋福.1998.青藏东昆仑晚古生代末-中生代中酸性火成岩与陆内造山过程[J].现代地质,(3):344-352.
何书跃,李东生,李良林,等.2009.青海东昆仑鸭子沟斑岩型铜(钼)矿区辉钼矿铼-锇同位素年龄及地质意义[J].大地构造与成矿学,33(02):236-242.
黄汲清,陈国铭,陈炳蔚.1984.特提斯-喜马拉雅构造域初步分析[J].地质学报,(1):4-20.
菅坤坤,魏燕霞,施彬,等.2015.东昆仑造山带中灶火地区早中生代镁铁质岩墙群的成因及地质意义[J].中国地质,(5):1457-1470.
菅坤坤,朱云海,王利伟,等.2017.东昆仑中灶火地区中三叠世花岗岩LA-ICP-MS锆石U-Pb定年、岩石成因及构造意义[J].地质论评,63(3):659-676.
姜春发.昆仑开合构造[M].北京:地质出版社,1992.
李侃,高永宝,钱兵,等.2015.东昆仑祁漫塔格虎头崖铅锌多金属矿区花岗岩年代学、地球化学及Hf同位素特征[J].中国地质,42(03):630-645.
李世金,孙丰月,丰成友,等.2008.青海东昆仑鸭子沟多金属矿的成矿年代学研究[J].地质学报,82(07):949-955.
罗文行,钱莉莉,李德威,等.2013.东昆仑中灶火地区超镁铁质辉石岩的成因[J].地球科学-中国地质大学学报,38(6):1214-1228.
罗照华,邓晋福,曹永清,等.1999.青海省东昆仑地区晚古生代-早中生代火山活动与区域构造演化[J].现代地质,13(01):51-56.
莫宣学,罗照华,邓晋福,等.2007.东昆仑造山带花岗岩及地壳生长[J].高校地质学报,13(3):403-414.
南卡俄吾,贾群子,李文渊,等.2014.青海东昆仑哈西亚图铁多金属矿区石英闪长岩LA-ICP-MS锆石U-Pb年龄和岩石地球化学特征[J].地质通报,(6):841-849.
南卡俄吾,贾群子,唐玲,等.2015.青海东昆仑哈西亚图矿区花岗闪长岩锆石U-Pb年龄与岩石地球化学特征[J].中国地质,42(3):702-712.
瞿泓滢,丰成友,裴荣富,等.2015.青海祁漫塔格虎头崖多金属矿区岩体热年代学研究[J].地质学报,89(03):498-509.
任纪舜.2004.昆仑-秦岭造山系的几个问题[J].西北地质,37(1):1-5.
田承盛,丰成友,李军红,等.2013.青海它温查汉铁多金属矿床40Ar-39Ar年代学研究及意义[J].矿床地质,32(01):169-176.
王秉璋,陈静,罗照华,等.2014.东昆仑祁漫塔格东段晚二叠世-早侏罗世侵入岩岩石组合时空分布、构造环境的讨论[J].岩石学报,30(11):3213-3228.
王富春,陈静,谢志勇,等.2013.东昆仑拉陵灶火钼多金属矿床地质特征及辉钼矿Re-Os同位素定年[J].中国地质,40(04):1209-1217.
王松,丰成友,李世金,等.2009.青海祁漫塔格卡尔却卡铜多金属矿区花岗闪长岩锆石SHRIMP U-Pb测年及其地质意义[J].中国地质,36(01):74-84.
肖庆辉,邓晋福,邱瑞照,等.2009.花岗岩类与大陆地壳生长初探---以中国典型造山带花岗岩类岩石的形成为例[J].中国地质,36(3):594-622.
熊富浩,马昌前,张金阳,等.2011.东昆仑造山带早中生代镁铁质岩墙群LA-ICP-MS锆石U-Pb定年、元素和Sr-Nd-Hf同位素地球化学[J].岩石学报,27(11):3350-3364.
许庆林,孙丰月,李碧乐,等.2014.东昆仑莫河下拉银多金属矿床花岗斑岩年代学、地球化学特征及其构造背景[J].大地构造与成矿学,38(02):421-433.
许志琴,杨经绥,李海兵,等.2006.中央造山带早古生代地体构架与高压/超高压变质带的形成[J].地质学报,80(12):1793-1806.
闫臻,边千韬,Oleg,等.2008.东昆仑南缘早三叠世洪水川组的源区特征:来自碎屑组成、重矿物和岩石地球化学的证据[J].岩石学报,24(5):1068-1078.
杨经绥,许志琴,李海兵,等.2005.东昆仑阿尼玛卿地区古特提斯火山作用和板块构造体系[J].岩石矿物学杂志,24(5):369-380.
杨经绥,许志琴,马昌前,等.2010.复合造山作用和中国中央造山带的科学问题[J].中国地质,37(1):1-11.
杨忠智.2012.东昆仑造山带东段下三叠统洪水川组地质特征及构造环境研究[D].西安:长安大学.
姚磊,吕志成,于晓飞,等.2015.青海祁漫塔格地区虎头崖矿床Ⅵ矿带花岗岩的成岩时代、地球化学特征和成因[J].吉林大学学报(地球科学版),45(03):743-758.
于淼,丰成友,刘洪川,等.2015.青海尕林格矽卡岩型铁矿金云母40Ar/39Ar年代学及成矿地质意义[J].地质学报,89(3):510-521.
袁洪林,吴福元,高山,等.2003.东北地区新生代侵入体的锆石激光探针U-Pb年龄测定与稀土元素成分分析[J].科学通报,48(14):1511.
袁万明,莫宣学,喻学惠,等.2000.东昆仑印支期区域构造背景的花岗岩记录[J].地质论评,46(2):203-211.
张爱奎,莫宣学,袁万明,等.2016.东昆仑西部野马泉地区三叠纪花岗岩成因与构造背景[J].矿物学报,36(2):157-173.
张建新,于胜尧,李云帅,等.2015.原特提斯洋的俯冲、增生及闭合:阿尔金-祁连-柴北缘造山系早古生代增生/碰撞造山作用[J].岩石学报,31(12):3531-3554.
(1)孙丰月等,2009,中国地质调查局地质调查项目成果报告:东昆仑成矿带重大找矿疑难问题研究报告
Liu Y,Gao S,Hu Z,et al.2010.Continental and Oceanic Crust Recycling-induced Melt-Peridotite Interactions in the Trans-North China Orogen:U-Pb Dating,Hf Isotopes and Trace Elements in Zircons from Mantle Xenoliths[J].Journal of Petrology,51(1-2):537-571.
Liu Y,Hu Z,Gao S,et al.2008.In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology,257(1-2):0-43.
Ludwig K.2003.User's manual for isoplot 3.00:a geo-chronological toolkit for Microsoft Exccl[M].Berkeley Geochronology Center Special Publication.4:1-70.
Maniar,P.D.,Piccoli,P.M.1989.Tectonic discrimination of granitoids[J].Geol.Soc.Am.Bull.101:673-689.
Pearce,J.A.1996.Sources and settings of granitic rocks[J].Episodes.19:120-125.
Peccerillo,A.,Taylor,D.R.1976.Geochemistry of Eocene Calc-alkaline Volcanic Rocks from the Kastamonu Area,Northern Turkey[J].Contrib.Mineral.Petrol.58:63-81.
Sun,S.S.,Mc Donough,W.F.1989.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes.In:Saunders,A.D.,Norry,M.J.(Eds.),Magmatism in Ocean Basins[M].Geological Society of Special Publication,London:313-345.
Wilson,M.1989.Igneous Petrogenesis[M].Unwin Hyman,London:466.
Yang J S,Robinson P T,Jiang C F,et al.1996.Ophiolites of the Kunlun Mountains,China and their tectonic implications[J].Tectonophysics,258(1-4):0-231.
Yuan H,Gao S,Liu X,et al.2010.Accurate U-Pb Age and Trace Element Determinations of Zircon by Laser Ablation-Inductively Coupled Plasma-Mass Spectrometry[J].Geostandards&Geoanalytical Research,28(3):353-370.
白宜娜,孙丰月,钱烨,等.2016.青海东昆仑尕林格铁多金属矿床辉石闪长岩U-Pb年代学及地球化学特征[J].世界地质,35(01):17-27.
陈丹玲,刘良,车自成,等.2001.祁漫塔格印支期铝质A型花岗岩的确定及初步研究[J].地球化学,30(6):540-546.
陈静,谢智勇,李彬,等.2013.东昆仑拉陵灶火钼多金属矿床含矿岩体地质地球化学特征及其成矿意义[J].地质与勘探,49(05):813-824.
丰成友,李东生,屈文俊,等.2009.青海祁漫塔格索拉吉尔矽卡岩型铜钼矿床辉钼矿铼-锇同位素定年及其地质意义[J].岩矿测试,2009,28(03):223-227.
丰成友,王松,李国臣,等.2012.青海祁漫塔格中晚三叠世花岗岩:年代学、地球化学及成矿意义[J].岩石学报,28(02):665-678.
丰成友,王雪萍,苏晓峰,等.2011.青海祁漫塔格虎头崖铅锌多金属矿区年代学研究及地质意义[J].吉林大学学报(地),41(6):1806-1817.
高永宝,李文渊,马晓光,等.2012.东昆仑尕林格铁矿床成因年代学及Hf同位素制约[J].兰州大学学报(自然科学版),48(02):36-47.
高永宝,李文渊,钱兵,等.2014.东昆仑野马泉铁矿相关花岗质岩体年代学、地球化学及Hf同位素特征[J].岩石学报,2014,30(06):1647-1665.
郭正府,邓晋福.1998.青藏东昆仑晚古生代末-中生代中酸性火成岩与陆内造山过程[J].现代地质,(3):344-352.
何书跃,李东生,李良林,等.2009.青海东昆仑鸭子沟斑岩型铜(钼)矿区辉钼矿铼-锇同位素年龄及地质意义[J].大地构造与成矿学,33(02):236-242.
黄汲清,陈国铭,陈炳蔚.1984.特提斯-喜马拉雅构造域初步分析[J].地质学报,(1):4-20.
菅坤坤,魏燕霞,施彬,等.2015.东昆仑造山带中灶火地区早中生代镁铁质岩墙群的成因及地质意义[J].中国地质,(5):1457-1470.
菅坤坤,朱云海,王利伟,等.2017.东昆仑中灶火地区中三叠世花岗岩LA-ICP-MS锆石U-Pb定年、岩石成因及构造意义[J].地质论评,63(3):659-676.
姜春发.昆仑开合构造[M].北京:地质出版社,1992.
李侃,高永宝,钱兵,等.2015.东昆仑祁漫塔格虎头崖铅锌多金属矿区花岗岩年代学、地球化学及Hf同位素特征[J].中国地质,42(03):630-645.
李世金,孙丰月,丰成友,等.2008.青海东昆仑鸭子沟多金属矿的成矿年代学研究[J].地质学报,82(07):949-955.
罗文行,钱莉莉,李德威,等.2013.东昆仑中灶火地区超镁铁质辉石岩的成因[J].地球科学-中国地质大学学报,38(6):1214-1228.
罗照华,邓晋福,曹永清,等.1999.青海省东昆仑地区晚古生代-早中生代火山活动与区域构造演化[J].现代地质,13(01):51-56.
莫宣学,罗照华,邓晋福,等.2007.东昆仑造山带花岗岩及地壳生长[J].高校地质学报,13(3):403-414.
南卡俄吾,贾群子,李文渊,等.2014.青海东昆仑哈西亚图铁多金属矿区石英闪长岩LA-ICP-MS锆石U-Pb年龄和岩石地球化学特征[J].地质通报,(6):841-849.
南卡俄吾,贾群子,唐玲,等.2015.青海东昆仑哈西亚图矿区花岗闪长岩锆石U-Pb年龄与岩石地球化学特征[J].中国地质,42(3):702-712.
瞿泓滢,丰成友,裴荣富,等.2015.青海祁漫塔格虎头崖多金属矿区岩体热年代学研究[J].地质学报,89(03):498-509.
任纪舜.2004.昆仑-秦岭造山系的几个问题[J].西北地质,37(1):1-5.
田承盛,丰成友,李军红,等.2013.青海它温查汉铁多金属矿床40Ar-39Ar年代学研究及意义[J].矿床地质,32(01):169-176.
王秉璋,陈静,罗照华,等.2014.东昆仑祁漫塔格东段晚二叠世-早侏罗世侵入岩岩石组合时空分布、构造环境的讨论[J].岩石学报,30(11):3213-3228.
王富春,陈静,谢志勇,等.2013.东昆仑拉陵灶火钼多金属矿床地质特征及辉钼矿Re-Os同位素定年[J].中国地质,40(04):1209-1217.
王松,丰成友,李世金,等.2009.青海祁漫塔格卡尔却卡铜多金属矿区花岗闪长岩锆石SHRIMP U-Pb测年及其地质意义[J].中国地质,36(01):74-84.
肖庆辉,邓晋福,邱瑞照,等.2009.花岗岩类与大陆地壳生长初探---以中国典型造山带花岗岩类岩石的形成为例[J].中国地质,36(3):594-622.
熊富浩,马昌前,张金阳,等.2011.东昆仑造山带早中生代镁铁质岩墙群LA-ICP-MS锆石U-Pb定年、元素和Sr-Nd-Hf同位素地球化学[J].岩石学报,27(11):3350-3364.
许庆林,孙丰月,李碧乐,等.2014.东昆仑莫河下拉银多金属矿床花岗斑岩年代学、地球化学特征及其构造背景[J].大地构造与成矿学,38(02):421-433.
许志琴,杨经绥,李海兵,等.2006.中央造山带早古生代地体构架与高压/超高压变质带的形成[J].地质学报,80(12):1793-1806.
闫臻,边千韬,Oleg,等.2008.东昆仑南缘早三叠世洪水川组的源区特征:来自碎屑组成、重矿物和岩石地球化学的证据[J].岩石学报,24(5):1068-1078.
杨经绥,许志琴,李海兵,等.2005.东昆仑阿尼玛卿地区古特提斯火山作用和板块构造体系[J].岩石矿物学杂志,24(5):369-380.
杨经绥,许志琴,马昌前,等.2010.复合造山作用和中国中央造山带的科学问题[J].中国地质,37(1):1-11.
杨忠智.2012.东昆仑造山带东段下三叠统洪水川组地质特征及构造环境研究[D].西安:长安大学.
姚磊,吕志成,于晓飞,等.2015.青海祁漫塔格地区虎头崖矿床Ⅵ矿带花岗岩的成岩时代、地球化学特征和成因[J].吉林大学学报(地球科学版),45(03):743-758.
于淼,丰成友,刘洪川,等.2015.青海尕林格矽卡岩型铁矿金云母40Ar/39Ar年代学及成矿地质意义[J].地质学报,89(3):510-521.
袁洪林,吴福元,高山,等.2003.东北地区新生代侵入体的锆石激光探针U-Pb年龄测定与稀土元素成分分析[J].科学通报,48(14):1511.
袁万明,莫宣学,喻学惠,等.2000.东昆仑印支期区域构造背景的花岗岩记录[J].地质论评,46(2):203-211.
张爱奎,莫宣学,袁万明,等.2016.东昆仑西部野马泉地区三叠纪花岗岩成因与构造背景[J].矿物学报,36(2):157-173.
张建新,于胜尧,李云帅,等.2015.原特提斯洋的俯冲、增生及闭合:阿尔金-祁连-柴北缘造山系早古生代增生/碰撞造山作用[J].岩石学报,31(12):3531-3554.
(1)孙丰月等,2009,中国地质调查局地质调查项目成果报告:东昆仑成矿带重大找矿疑难问题研究报告
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |