阿尔金断裂东段红柳峡早白垩世晚期岩浆事件及其区域构造意义
|
摘要
阿尔金断裂东段红柳峡火山岩及其周缘火山岩的岩石学、锆石成因岩相学及LA-ICP-MS U-Pb年代学对比研究显示,样品中存在两种锆石类型。一种为来自火山颈中心相样品的长柱状岩浆锆石,加权平均年龄为(109.0±1.6)Ma,属于早白垩世晚期,代表了红柳峡火山颈形成的年龄。另一种为来自火山颈周缘两个玄武岩样品的次圆或椭圆状继承锆石,且绝大部分具有核、幔结构,其U-Pb年龄分布在(138±2)~(2 376±74)Ma,展现了复杂的年龄峰值。这些继承锆石均为玄武岩浆上升过程中从下白垩统及更早地层捕获而来,它们的峰值年龄密切响应了阿尔金断裂早白垩世晚期及更早期复杂的多期岩浆及构造事件。部分年龄峰值与南阿尔金地体古生代花岗岩年龄的吻合显示阿尔金地体曾经与祁连陆块连接在一起。
This paper made a comprehensive study on the petrology,zircon morphology and LA-ICP-MS U-Pb geochronology of the Hongliuxia and its peripheral volcanic rocks in the eastern sector of the Altyn Tagh Fault.The results show that there are two types of zircons in the samples. One is a type of long-columnar magmatic zircons sampled from the volcanic neck,whose weighted average age is( 109. 0 ± 1. 6) Ma( late Early Cretaceous),and it represents the formation age of Hongliuxia volcanic rocks. This age agrees well with previous results through different approaches. The other is a type of sub-rounded or oval inherited zircons sampled fromthe peripheral basalts,and most of them have the core mantle structure. The age distribution ranges from( 138± 2) to( 2,376 ± 74) Ma,which show the diverse age peaks. These inherited zircons are all captured from the Lower Cretaceous or/and earlier strata during the rising of basaltic magma. Their age peaks closely respond to the complex multi-phase magma and tectonic events in the late Early Cretaceous or earlier time of the Altyn Tagh Fault. In addition,part of the age peaks coincident with the age of Paleozoic granite in the southern Altyn Tagh Terrane suggests that the Altyn Tagh Terrane was once connected to the Qilian Block.
This paper made a comprehensive study on the petrology,zircon morphology and LA-ICP-MS U-Pb geochronology of the Hongliuxia and its peripheral volcanic rocks in the eastern sector of the Altyn Tagh Fault.The results show that there are two types of zircons in the samples. One is a type of long-columnar magmatic zircons sampled from the volcanic neck,whose weighted average age is( 109. 0 ± 1. 6) Ma( late Early Cretaceous),and it represents the formation age of Hongliuxia volcanic rocks. This age agrees well with previous results through different approaches. The other is a type of sub-rounded or oval inherited zircons sampled fromthe peripheral basalts,and most of them have the core mantle structure. The age distribution ranges from( 138± 2) to( 2,376 ± 74) Ma,which show the diverse age peaks. These inherited zircons are all captured from the Lower Cretaceous or/and earlier strata during the rising of basaltic magma. Their age peaks closely respond to the complex multi-phase magma and tectonic events in the late Early Cretaceous or earlier time of the Altyn Tagh Fault. In addition,part of the age peaks coincident with the age of Paleozoic granite in the southern Altyn Tagh Terrane suggests that the Altyn Tagh Terrane was once connected to the Qilian Block.
引文
[1]杨经绥,孟繁聪,张建新,等.重新认识阿尔金断裂东段红柳峡火山岩的时代及构造意义[J].中国科学:D辑,2001,31(12):83-89.
[2]王晓丰,张志诚,郭召杰,等.酒西盆地南缘旱峡早白垩世火山岩地球化学特征及其构造意义[J].高校地质学报,2004,10(4):569-577.
[3]王方成,王凡,张国旭,等.甘肃西部红柳峡火山颈火山岩地球化学特征及意义[J].矿物岩石,2012,32(1):55-60.
[4]汤文豪,张志诚,李建锋,等.阿尔金断裂东端白垩纪火山岩地球化学特征及其地质意义[J].地学前缘,2012,19(4):51-62.
[5]李璞.甘肃玉门红柳峡第三纪火山颈的报导[J].地质科学,1959,2(11):341-342.
[6]中国科学院地质研究所.祁连山地质志(第二卷第二分册)[M].北京:科学出版社,1962:116-140.
[7]刘金坤,郑禾杰,郑国栋.酒西盆地玄武岩的岩性特征及时代[J].兰州大学学报(自然科学版),1987,23(3):104
[8]潘桂棠,王培生,徐耀荣,等.青藏高原新生代构造演化[M].北京:地质出版社,1990:32-68.
[9]解广轰,刘丛强,增田彰正,等.青藏高原周边地区新生代火山岩的地球化学特征——古老富集地幔存在的证据[M]//刘若新.中国新生代火山岩:年代学与地球化学.北京:地震出版社,1992:400-427.
[10]赖绍聪.青藏高原新生代火山岩矿物化学及其岩石学意义——以玉门、可可西里及芒康岩区为例[J].矿物学报,1999,19(2):236-244.
[11]旷红伟,柳永清,刘燕学,等.兴蒙造山区及邻区早白垩世盆地岩石地层格架与沉积古地理演化[J].地质通报,32(7):1063-1084.
[12]曾令森,杨经绥,李海兵.青藏高原北缘红柳峡富锆安山岩脉的成因:钙长石分离结晶作用和锆石的异常溶解[J].中国地质,2006,33(2):326-331.
[13]彭楠,旷红伟,柳永清.北祁连—酒西地区早白垩世盆地沉积特征与古地理演化[J].地学前缘,2011,18(4):77-87.
[14]甘肃省地质矿产局.中华人民共和国地质矿产部地质专报:区域地质(第19号).甘肃省区域地质志[M].北京:地质出版社,1989:1-961.
[15]冯益民,吴汉泉.祁连山及其邻区古生代以来大地构造演化初探[J].西北地质科学,1992,13(2):61-70.
[16]李奋其,王成善,王崇孝.酒泉早白垩世盆地群构造特征和成因[J].地质学报,2006,80(2):181-191.
[17]赵文智.中国西北地区侏罗纪原型盆地形成与演化[M].北京:地质出版社,2000:1-270.
[18]刘宝睿,杨克绳,刘东艳.论河西走廊陆盆的演化和最终形成[J].地质论评,2009,55(1):25-31.
[19]WIEDENBECK M,ALLEP,CORFU F,et al.Three natural zircon standards for U-Th-Pb,Lu-Hf,trace-element and REE analyses[J].Geostandards Newsletter,1995,19(1):1-23.
[20]WIEDENBECK M,HANCHAR J M,PECK W H,et al.Further characterisation of the 91500 zircon crystal[J].Geostandards and Geoanalytical Research,2004,28(1):9-39.
[21]BLACK L P,GULSON B L.The age of the Mud Tank carbonatite,Strangways Range,Northern Territory[J].BMR Journal of Australian Geology and Geophysics,1978,3:227-232.
[22]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.
[23]SUN S S,MCDONOUGH W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[M]//SAUNDERS A D,NORRY M J.Magmatism in Ocean Basins.London:Geological Society of Lodon,1989:313-345.
[24]袁洪林,吴福元,高山,等.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,2003,48(14):1511-1520.
[25]李海兵,杨经绥.青藏高原北部白垩纪隆升的证据[J].地学前缘,2004,11(4):345-359.
[26]KEAY S,STEELE D,COMPSTON W.Identifying granite sources by SHRIMP U-Pb zircon geochronology:An application to the Lachlan foldbelt[J].Contributions to Mineralogy and Petrology,1999,137:323-341.
[27]朱弟成,潘桂棠,莫宣学,等.特提斯喜马拉雅桑秀组英安岩锆石SHRIMP年龄及其意义[J].科学通报,2005,50(4):375-379.
[28]彭楠,柳永清,旷红伟,等.北祁连—北山地区早白垩世盆地物源分析——来自古水流、砾石组分、砂岩组分和碎屑锆石年龄的证据[J].地质通报,2013,32(2/3):456-475.
[29]CHENG F,JOLIVET M,FU S T,et al.Large-scale displacement along the Altyn Tagh Fault(North Tibet)since its Eocene initiation:Insight from detrital zircon U-Pb geochronology and subsurface data[J].Tectonophysics,2016,677/678:261-279.
[30]WANG Y,ZHANG X M,WANG E C,et al.40Ar/39Ar thermochronological evidence for formation and Mesozoic evolution of the northern-central segment of the Altyn Tagh fault system in the northern Tibetan Plateau[J].GSA Bulletin,2005,117(9/10):1336-1346.
[31]DELVILLE N,ARNAUD N,MONTEL J M,et al.Paleozoic to Cenozoic deformation along the Altyn Tagh Fault in the Altun Shan Massif area,eastern Qilian Shan,northeastern Tibet,China[M]//HENDRIX M S,DAVIS G A.Paleozoic and Mesozoic Tectonic Evolution of Central and Eastern Asia:From Continental Assembly to Intracontinental Deformation.Boulder:Geological Society of America,2001:269-292.
[32]崔军文,唐哲民,邓晋福,等.阿尔金断裂系[M].北京:地质出版社,1998:1-249.
[33]吴才来,郜源红,雷敏,等.南阿尔金茫崖地区花岗岩类锆石SHRIMP U-Pb定年、Lu-Hf同位素特征及岩石成因[J].岩石学报,2014,30(8):2297-2323.
[34]吴才来,雷敏,吴迪,等.南阿尔金古生代花岗岩U-Pb定年及岩浆活动对造山带构造演化的响应[J].地质学报,2016,90(9):2276-2315.
[35]朱云海,林启祥,贾春兴,等.东昆仑造山带早古生代火山岩锆石SHRIMP年龄及其地质意义[J].中国科学:D辑,2005,35(12):1112-1119.
[36]李海兵,杨经绥,许志琴,等.阿尔金断裂印支期走滑的地质及同位素证据[J].科学通报,2001,46(16):1333-1338.
[37]杨经绥,许志琴,李海兵,等.柴北缘大柴旦榴辉岩的发现及区域构造意义[J].科学通报,1998,43(14):1544-1549.
[38]张建新,张泽明,许志琴,等.阿尔金构造带西段榴辉岩的Sm-Nd及U-Pb年龄[J].科学通报,1999,44(10):1109-1112.
[39]陈柏林,李松彬,蒋荣宝,等.阿尔金喀腊大湾地区中酸性火山岩SHRIMP年龄及其构造环境[J].地质学报,2016,90(4):708-727.
[40]杨经绥,史仁灯,吴才来,等.北阿尔金地区米兰红柳沟蛇绿岩的岩石学特征和SHRIMP定年[J].岩石学报,2008,24(7):1567-1584.
[41]王忠梅,肖文交,韩春明,等.甘肃敦煌红柳峡地区石榴石斜长角闪岩的变质特征、锆石U-Pb年龄及地质意义[J].岩石学报,2013,29(5):1685-1697.
[42]WANG C,LIU L,YANG W Q,et al.Provenance and ages of the Altyn Complex in Altyn Tagh:implications for the early Neoproterozoic evolution of northwestern China[J].Precambrian Research,2013,230:193-208.
[2]王晓丰,张志诚,郭召杰,等.酒西盆地南缘旱峡早白垩世火山岩地球化学特征及其构造意义[J].高校地质学报,2004,10(4):569-577.
[3]王方成,王凡,张国旭,等.甘肃西部红柳峡火山颈火山岩地球化学特征及意义[J].矿物岩石,2012,32(1):55-60.
[4]汤文豪,张志诚,李建锋,等.阿尔金断裂东端白垩纪火山岩地球化学特征及其地质意义[J].地学前缘,2012,19(4):51-62.
[5]李璞.甘肃玉门红柳峡第三纪火山颈的报导[J].地质科学,1959,2(11):341-342.
[6]中国科学院地质研究所.祁连山地质志(第二卷第二分册)[M].北京:科学出版社,1962:116-140.
[7]刘金坤,郑禾杰,郑国栋.酒西盆地玄武岩的岩性特征及时代[J].兰州大学学报(自然科学版),1987,23(3):104
[8]潘桂棠,王培生,徐耀荣,等.青藏高原新生代构造演化[M].北京:地质出版社,1990:32-68.
[9]解广轰,刘丛强,增田彰正,等.青藏高原周边地区新生代火山岩的地球化学特征——古老富集地幔存在的证据[M]//刘若新.中国新生代火山岩:年代学与地球化学.北京:地震出版社,1992:400-427.
[10]赖绍聪.青藏高原新生代火山岩矿物化学及其岩石学意义——以玉门、可可西里及芒康岩区为例[J].矿物学报,1999,19(2):236-244.
[11]旷红伟,柳永清,刘燕学,等.兴蒙造山区及邻区早白垩世盆地岩石地层格架与沉积古地理演化[J].地质通报,32(7):1063-1084.
[12]曾令森,杨经绥,李海兵.青藏高原北缘红柳峡富锆安山岩脉的成因:钙长石分离结晶作用和锆石的异常溶解[J].中国地质,2006,33(2):326-331.
[13]彭楠,旷红伟,柳永清.北祁连—酒西地区早白垩世盆地沉积特征与古地理演化[J].地学前缘,2011,18(4):77-87.
[14]甘肃省地质矿产局.中华人民共和国地质矿产部地质专报:区域地质(第19号).甘肃省区域地质志[M].北京:地质出版社,1989:1-961.
[15]冯益民,吴汉泉.祁连山及其邻区古生代以来大地构造演化初探[J].西北地质科学,1992,13(2):61-70.
[16]李奋其,王成善,王崇孝.酒泉早白垩世盆地群构造特征和成因[J].地质学报,2006,80(2):181-191.
[17]赵文智.中国西北地区侏罗纪原型盆地形成与演化[M].北京:地质出版社,2000:1-270.
[18]刘宝睿,杨克绳,刘东艳.论河西走廊陆盆的演化和最终形成[J].地质论评,2009,55(1):25-31.
[19]WIEDENBECK M,ALLEP,CORFU F,et al.Three natural zircon standards for U-Th-Pb,Lu-Hf,trace-element and REE analyses[J].Geostandards Newsletter,1995,19(1):1-23.
[20]WIEDENBECK M,HANCHAR J M,PECK W H,et al.Further characterisation of the 91500 zircon crystal[J].Geostandards and Geoanalytical Research,2004,28(1):9-39.
[21]BLACK L P,GULSON B L.The age of the Mud Tank carbonatite,Strangways Range,Northern Territory[J].BMR Journal of Australian Geology and Geophysics,1978,3:227-232.
[22]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.
[23]SUN S S,MCDONOUGH W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[M]//SAUNDERS A D,NORRY M J.Magmatism in Ocean Basins.London:Geological Society of Lodon,1989:313-345.
[24]袁洪林,吴福元,高山,等.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,2003,48(14):1511-1520.
[25]李海兵,杨经绥.青藏高原北部白垩纪隆升的证据[J].地学前缘,2004,11(4):345-359.
[26]KEAY S,STEELE D,COMPSTON W.Identifying granite sources by SHRIMP U-Pb zircon geochronology:An application to the Lachlan foldbelt[J].Contributions to Mineralogy and Petrology,1999,137:323-341.
[27]朱弟成,潘桂棠,莫宣学,等.特提斯喜马拉雅桑秀组英安岩锆石SHRIMP年龄及其意义[J].科学通报,2005,50(4):375-379.
[28]彭楠,柳永清,旷红伟,等.北祁连—北山地区早白垩世盆地物源分析——来自古水流、砾石组分、砂岩组分和碎屑锆石年龄的证据[J].地质通报,2013,32(2/3):456-475.
[29]CHENG F,JOLIVET M,FU S T,et al.Large-scale displacement along the Altyn Tagh Fault(North Tibet)since its Eocene initiation:Insight from detrital zircon U-Pb geochronology and subsurface data[J].Tectonophysics,2016,677/678:261-279.
[30]WANG Y,ZHANG X M,WANG E C,et al.40Ar/39Ar thermochronological evidence for formation and Mesozoic evolution of the northern-central segment of the Altyn Tagh fault system in the northern Tibetan Plateau[J].GSA Bulletin,2005,117(9/10):1336-1346.
[31]DELVILLE N,ARNAUD N,MONTEL J M,et al.Paleozoic to Cenozoic deformation along the Altyn Tagh Fault in the Altun Shan Massif area,eastern Qilian Shan,northeastern Tibet,China[M]//HENDRIX M S,DAVIS G A.Paleozoic and Mesozoic Tectonic Evolution of Central and Eastern Asia:From Continental Assembly to Intracontinental Deformation.Boulder:Geological Society of America,2001:269-292.
[32]崔军文,唐哲民,邓晋福,等.阿尔金断裂系[M].北京:地质出版社,1998:1-249.
[33]吴才来,郜源红,雷敏,等.南阿尔金茫崖地区花岗岩类锆石SHRIMP U-Pb定年、Lu-Hf同位素特征及岩石成因[J].岩石学报,2014,30(8):2297-2323.
[34]吴才来,雷敏,吴迪,等.南阿尔金古生代花岗岩U-Pb定年及岩浆活动对造山带构造演化的响应[J].地质学报,2016,90(9):2276-2315.
[35]朱云海,林启祥,贾春兴,等.东昆仑造山带早古生代火山岩锆石SHRIMP年龄及其地质意义[J].中国科学:D辑,2005,35(12):1112-1119.
[36]李海兵,杨经绥,许志琴,等.阿尔金断裂印支期走滑的地质及同位素证据[J].科学通报,2001,46(16):1333-1338.
[37]杨经绥,许志琴,李海兵,等.柴北缘大柴旦榴辉岩的发现及区域构造意义[J].科学通报,1998,43(14):1544-1549.
[38]张建新,张泽明,许志琴,等.阿尔金构造带西段榴辉岩的Sm-Nd及U-Pb年龄[J].科学通报,1999,44(10):1109-1112.
[39]陈柏林,李松彬,蒋荣宝,等.阿尔金喀腊大湾地区中酸性火山岩SHRIMP年龄及其构造环境[J].地质学报,2016,90(4):708-727.
[40]杨经绥,史仁灯,吴才来,等.北阿尔金地区米兰红柳沟蛇绿岩的岩石学特征和SHRIMP定年[J].岩石学报,2008,24(7):1567-1584.
[41]王忠梅,肖文交,韩春明,等.甘肃敦煌红柳峡地区石榴石斜长角闪岩的变质特征、锆石U-Pb年龄及地质意义[J].岩石学报,2013,29(5):1685-1697.
[42]WANG C,LIU L,YANG W Q,et al.Provenance and ages of the Altyn Complex in Altyn Tagh:implications for the early Neoproterozoic evolution of northwestern China[J].Precambrian Research,2013,230:193-208.
© 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 |