西准噶尔哈拉阿拉特组火山岩LA-ICP-MS锆石U-Pb年龄
|
摘要
哈拉阿拉特组是西准噶尔哈拉阿拉特山一带分布最广,研究程度最低,时代认识分歧最大,火山岩在该区全部组级地层中所占比例最高,且层位相对较新的海相火山-沉积建造。笔者在该区进行1:5万区域地质调查中,对哈拉阿拉特组中下部层位辉石安山岩与流纹岩进行LA-ICPMS测年,获得锆石U-Pb年龄分别为(306.9±5.5)Ma(MSWD=1.8)与(304.5±3.1)Ma(MSWD=0.63),二者误差范围内一致,综合所测锆石的CL图像特征,指示其代表了哈拉阿拉特组的形成时代。结合前人化石资料将哈拉阿拉特组时代确定为晚石炭世,认为其中下部层位时代不老于306.9Ma为宜。这一成果准确约束了区内海相火山地层的时代,并为研究西准噶尔构造带的火山岩浆作用及其构造演化提供了新的年代学证据。
Hala'alate formation is widely distributed in Hala'alate Mountain.Few researches have been conducted on this formation and there is great disparity in its age identification.The proportion of volcanic rocks in the area is the highest of all the group- level strata,and the position is relatively new marine volcano and sedimentary formation.LA- ICP- MS dating was used to determine the zircons from pyroxene andesite and rhyolite of the Hala'alate formation by 1:50000regional geological survey,which yielded zircon U- Pb age of C306.9 + 5.5) Ma(MSWD=0.39)and(304.5±3.1) Ma(MSWD=0.63) respectively,both were consistent within the error range.Combining with the CL image features of zircons,the formation age of Hala'alate formation was signified.In view of predecessors' fossil information,which confirmed that the forming age of Hala'alate formation was late Carboniferous,the authors considered that the age of lower strata was no earlier than 306.9 Ma.The findings accurately constrained the period of marine volcanic strata in this area,and provided new chronological evidence for volcanic magmatism and tectonic evolution of western Junggar tectonic belt.
Hala'alate formation is widely distributed in Hala'alate Mountain.Few researches have been conducted on this formation and there is great disparity in its age identification.The proportion of volcanic rocks in the area is the highest of all the group- level strata,and the position is relatively new marine volcano and sedimentary formation.LA- ICP- MS dating was used to determine the zircons from pyroxene andesite and rhyolite of the Hala'alate formation by 1:50000regional geological survey,which yielded zircon U- Pb age of C306.9 + 5.5) Ma(MSWD=0.39)and(304.5±3.1) Ma(MSWD=0.63) respectively,both were consistent within the error range.Combining with the CL image features of zircons,the formation age of Hala'alate formation was signified.In view of predecessors' fossil information,which confirmed that the forming age of Hala'alate formation was late Carboniferous,the authors considered that the age of lower strata was no earlier than 306.9 Ma.The findings accurately constrained the period of marine volcanic strata in this area,and provided new chronological evidence for volcanic magmatism and tectonic evolution of western Junggar tectonic belt.
引文
蔡土赐.新疆维吾尔自治区岩石地层[M].武汉:中国地质大学出版社,1999:1-77.
CAI Tuci.Rock and Stratigraphy of Xinjiang Province[M].Wuhan:China University of Geology Publishing House,1999:1-77.
黄波,梁华英,莫济海,等.金平铜厂铜钼矿床赋矿岩体锆石LA-ICP-MS U-Pb年龄及意义[J].大地构造与成矿学,2009,33(4):598-622.
HUANG Bo,LIANG Huaying,MO Jihai,et al.Zircon LA-ICP-MS U-Pb Age of the Jinping-Tongchang Porphyry Associated with Cu-Mo Mineralization and its Geological Implication[J].Geotectonica et Metallogenia,2009,33(4):598-622.
孙羽,赵春环,李永军,等.西准噶尔包古图地区石炭系希贝库拉斯组碎屑锆石LA-ICP-MS U-Pb年代学及其地质意义[J].地层学杂志,2014,38(1):42-50.
SUN Yu,ZHAO Chunhuan,LI Yongjun,et al.Detrital Zircon LA-ICP-MS U-Pb Dating of the Carboniferous Xibeikulasi Formation Sandstone in the Baogutu Area,Weastern Junggar,and Its Geological Significance[J].Journal of Stratigraphy,2014,38(1):42-50.
王金荣,贾志磊,李泰德,等.新疆西准噶尔发现早泥盆世埃达克岩:大地构造及成矿意义[J].岩石学报,2013,29(3):840-852
WANG Jinrong,JIA Zhilei,LI Taide,et al.Discovery of Early Devonian Adakite in West Junggar,Xinjiang:Implications for Geotectonics and Cu Mineralization[J].Acta Petrologica Sinica,2013,29(3):840-852.
王向东,金玉开.石炭纪年代地层学研究概况[J].地层学杂志,2000,24(2):90-98.
WANG Xiangdong,JIN Yugan.An Outline of Carboniferous Chronostratigraphy[J].Journal of Stratigraphy,2000,24(2):90-98.
王玉净,金玉玕,江纳言.论哈拉阿拉特组的时代及古环境特征[J].地层学杂志,1987,11(1):53-57.
WANG Yujing,JIN Yugan,JIANG Nayan.Discuss the Age and Ancient Environment Characteristics of Hala'alate Formation[J].Journal of Stratigraphy,1987,11(1):53-57.
吴乃元.石炭系//新疆地质矿产局地质矿产研究所,新疆地质矿产局第一区调大队.新疆古生界(新疆地层总结之二)下[M].乌鲁木齐:新疆人民出版社,1999:191-202.
WU Naiyuan.Carboniferous//Institute of Geology and Mineral Resources Bureau of Geology and Mineral Resources in Xinjiang,the First Regional Geological Survey Team of Bureau of Geology and Mineral Resources of Xinjiang.Palaeozoic Group in Xinjiang,Second[M].Urumqi:Volksverlag Xinjiang,1999:191-202.
吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报,2004,49(16):1589-1604.
WU Baoyuan,ZHENG Yongfei.Zircon Genetic Mineralogy Research and Interpretation of U-Pb Age Restriction[J].Chinese Science Bulletin,2004,49(16):1589-1604.
向坤鹏,李永军,徐磊,等.新疆西准噶尔白碱滩一带成吉思汗山组的建立及地质意义[J].西北地质,2013,46(2):63-68.
XIANG Kunpeng,LI Yongjun,XU lei,et al.The Definition of Chengjisihanshan Formation and Its Significances in Baijiantan Region,West Junggar,Xinjiang[J].Northwestern Geology,2013,46(2):63-68.
新疆维吾尔自治区地质局.1:20万《乌尔禾幅》(L-45-XIV)区域地质调查报告[R].1979.
Geology Bureau of Xinjiang Uygur Autonomous Region.Report of 1:200000 Geological Survey in Wuerhe Area[R].1979.
新疆维吾尔自治区地质矿产局.新疆维吾尔自治区区域地质志[M].北京:地质出版社,1993.
Bureau of Geology and Mineral Resources of Xinjiang Uygur Autonomous Region.Regional Geology of Xinjiang Uygur Autonomous Region[M].Beijing:Geological Publishing House,1993.
赵治信.新疆北部石炭系划分[J].新疆石油地质,2009,30(4):478-482.
ZHAO Zhixin.Classification of Carboniferous in Northern Xinjiang[J].Xinjiang Petroleum Geology,2009,30(4):478-482.
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.
YUAN Honglin,WU Fuyuan,GAO Shan,et al.Zircon Laser Probe U-Pb Dating and REE Composition Analysis of Cenozoic Intrusive[J].Northeast China.Chinese Science Bulletin,2003,48(14):1511-1520.
纵瑞文,范若颖,蒋涛,等.西准噶尔石炭系哈拉阿拉特组新知[J].地层学杂志,2014,38(3):290-298.
ZONG Ruiwen,FAN Ruoying,JIANG Tao,et al.New Information about the Carboniferous Hala'alate Formation in Western Junggar,Xinjiang[J].Journal of Stratigraphy,2014,38(3):290-298.
ANDERSEN T.Correction of Common Lead in U-Pb Analyses that Do Not Report~(204)Pb[J].Chemical Geology,2002,192:59-79.
BALLARD J R,PALIN J M,WILLIAMS I S.Two Ages of Porphyry Intrusion Resolved for the Super-giant Chuquicamata Copper Deposit of Northern Chile by LAICP-MS and SHRIMP[J].Geology,2001,9:383-386.
COMPSTON W,WILLIAMS I S,KIRSCHVINK J L.Zircon U-Pb Ages for the Early Cambrian Time-scale[J].Journal of Geological Society.London,1992,149:171-184.
CLAESSON S,VETRIN V,BAYANOVA T.U-Pb Zircon Age from a Devonian Carbonatite Dyke,Kolapeninsula,Russia;a Record of Geological Evolution from the Archaean to the Palaeozoic[J].Lithos,2000,51(1-2):95-108.
CHEN J F,HAN B F,JI J Q,et al.Zircon U-Pb Ages and Tectonic Implications of Paleozoic Plutons in Northern West Junggar,North Xinjiang,China[J].Lithos,2010,115(1-4):137-152.
HORN I,RUDINICK R L,MCDONOUGH W F.Precise Elemental and Isolope Ratio Determination Bysimultaneous Solution Nebulization and Laser AblationICPMS:Application to U-Pb Geochronologyo[J].Chemical Geology,2000,167:405-425.
HOSKIN P W O,BLACK L P.Metamorphic Zircon Formation by Solidstate Recrystallization of Protolith Igneous Zircon[J].Metamorphic Geol.,2000,18:423-439.
KOSLER J,FONNELAND H,SYLVESTER P.U-Pb Dating of Detrital Zircons for Sediment Provenancestudies—a Comparison of Laser Ablation ICPMS and SIMS Techniques[J].Chemical Geology,2002,182:605-618.
LUDWIG K R.Isoplot—a Plotting and Regression Program for Radiogenic-isolope Data[J].US Geological Survey Open—File Report,1991,39:91-445.
PIDGEON R T,NEMCHIN A A,HITCHEN G J.Internal Structures of Zircons from Archaean Granites from the Darling Range Batholiths:Implications for Zircon Stability and the Interpretation of Zircon U-Pb Ages[J].Contributions to Mineralogy and Petrology,1998,132:288-299.
TAO H F,WANG Q C,YANG X F,et al.Provenance and Tectonic Settinclastic Rocks In West Junggar,Xinjiang,China:A Case from the Hala-Alat Mountains[J].Journal of Asian Earth Science,2013,64:210-222.
WILLIAMS I S,BUICK A,CARTWRIGHT I.An Extended of Early Episode Mesoproterozoic Metamorphic Fluid Flow in the Reynold Region,Central Australia[J].J Metamorphic Geol,1996,14:29-47.
XU Z,HAN B F,REN R,et al.Ultramafic-mafic Melange,Island Arc and Postcollisional Intrusions in the Mayile Mountain,West Junggar,China:Implications for Paleozoic Intra-oceanic Subduction-accretion Process[J].Lithos,2012,132-133:141-161.
CAI Tuci.Rock and Stratigraphy of Xinjiang Province[M].Wuhan:China University of Geology Publishing House,1999:1-77.
黄波,梁华英,莫济海,等.金平铜厂铜钼矿床赋矿岩体锆石LA-ICP-MS U-Pb年龄及意义[J].大地构造与成矿学,2009,33(4):598-622.
HUANG Bo,LIANG Huaying,MO Jihai,et al.Zircon LA-ICP-MS U-Pb Age of the Jinping-Tongchang Porphyry Associated with Cu-Mo Mineralization and its Geological Implication[J].Geotectonica et Metallogenia,2009,33(4):598-622.
孙羽,赵春环,李永军,等.西准噶尔包古图地区石炭系希贝库拉斯组碎屑锆石LA-ICP-MS U-Pb年代学及其地质意义[J].地层学杂志,2014,38(1):42-50.
SUN Yu,ZHAO Chunhuan,LI Yongjun,et al.Detrital Zircon LA-ICP-MS U-Pb Dating of the Carboniferous Xibeikulasi Formation Sandstone in the Baogutu Area,Weastern Junggar,and Its Geological Significance[J].Journal of Stratigraphy,2014,38(1):42-50.
王金荣,贾志磊,李泰德,等.新疆西准噶尔发现早泥盆世埃达克岩:大地构造及成矿意义[J].岩石学报,2013,29(3):840-852
WANG Jinrong,JIA Zhilei,LI Taide,et al.Discovery of Early Devonian Adakite in West Junggar,Xinjiang:Implications for Geotectonics and Cu Mineralization[J].Acta Petrologica Sinica,2013,29(3):840-852.
王向东,金玉开.石炭纪年代地层学研究概况[J].地层学杂志,2000,24(2):90-98.
WANG Xiangdong,JIN Yugan.An Outline of Carboniferous Chronostratigraphy[J].Journal of Stratigraphy,2000,24(2):90-98.
王玉净,金玉玕,江纳言.论哈拉阿拉特组的时代及古环境特征[J].地层学杂志,1987,11(1):53-57.
WANG Yujing,JIN Yugan,JIANG Nayan.Discuss the Age and Ancient Environment Characteristics of Hala'alate Formation[J].Journal of Stratigraphy,1987,11(1):53-57.
吴乃元.石炭系//新疆地质矿产局地质矿产研究所,新疆地质矿产局第一区调大队.新疆古生界(新疆地层总结之二)下[M].乌鲁木齐:新疆人民出版社,1999:191-202.
WU Naiyuan.Carboniferous//Institute of Geology and Mineral Resources Bureau of Geology and Mineral Resources in Xinjiang,the First Regional Geological Survey Team of Bureau of Geology and Mineral Resources of Xinjiang.Palaeozoic Group in Xinjiang,Second[M].Urumqi:Volksverlag Xinjiang,1999:191-202.
吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报,2004,49(16):1589-1604.
WU Baoyuan,ZHENG Yongfei.Zircon Genetic Mineralogy Research and Interpretation of U-Pb Age Restriction[J].Chinese Science Bulletin,2004,49(16):1589-1604.
向坤鹏,李永军,徐磊,等.新疆西准噶尔白碱滩一带成吉思汗山组的建立及地质意义[J].西北地质,2013,46(2):63-68.
XIANG Kunpeng,LI Yongjun,XU lei,et al.The Definition of Chengjisihanshan Formation and Its Significances in Baijiantan Region,West Junggar,Xinjiang[J].Northwestern Geology,2013,46(2):63-68.
新疆维吾尔自治区地质局.1:20万《乌尔禾幅》(L-45-XIV)区域地质调查报告[R].1979.
Geology Bureau of Xinjiang Uygur Autonomous Region.Report of 1:200000 Geological Survey in Wuerhe Area[R].1979.
新疆维吾尔自治区地质矿产局.新疆维吾尔自治区区域地质志[M].北京:地质出版社,1993.
Bureau of Geology and Mineral Resources of Xinjiang Uygur Autonomous Region.Regional Geology of Xinjiang Uygur Autonomous Region[M].Beijing:Geological Publishing House,1993.
赵治信.新疆北部石炭系划分[J].新疆石油地质,2009,30(4):478-482.
ZHAO Zhixin.Classification of Carboniferous in Northern Xinjiang[J].Xinjiang Petroleum Geology,2009,30(4):478-482.
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.
YUAN Honglin,WU Fuyuan,GAO Shan,et al.Zircon Laser Probe U-Pb Dating and REE Composition Analysis of Cenozoic Intrusive[J].Northeast China.Chinese Science Bulletin,2003,48(14):1511-1520.
纵瑞文,范若颖,蒋涛,等.西准噶尔石炭系哈拉阿拉特组新知[J].地层学杂志,2014,38(3):290-298.
ZONG Ruiwen,FAN Ruoying,JIANG Tao,et al.New Information about the Carboniferous Hala'alate Formation in Western Junggar,Xinjiang[J].Journal of Stratigraphy,2014,38(3):290-298.
ANDERSEN T.Correction of Common Lead in U-Pb Analyses that Do Not Report~(204)Pb[J].Chemical Geology,2002,192:59-79.
BALLARD J R,PALIN J M,WILLIAMS I S.Two Ages of Porphyry Intrusion Resolved for the Super-giant Chuquicamata Copper Deposit of Northern Chile by LAICP-MS and SHRIMP[J].Geology,2001,9:383-386.
COMPSTON W,WILLIAMS I S,KIRSCHVINK J L.Zircon U-Pb Ages for the Early Cambrian Time-scale[J].Journal of Geological Society.London,1992,149:171-184.
CLAESSON S,VETRIN V,BAYANOVA T.U-Pb Zircon Age from a Devonian Carbonatite Dyke,Kolapeninsula,Russia;a Record of Geological Evolution from the Archaean to the Palaeozoic[J].Lithos,2000,51(1-2):95-108.
CHEN J F,HAN B F,JI J Q,et al.Zircon U-Pb Ages and Tectonic Implications of Paleozoic Plutons in Northern West Junggar,North Xinjiang,China[J].Lithos,2010,115(1-4):137-152.
HORN I,RUDINICK R L,MCDONOUGH W F.Precise Elemental and Isolope Ratio Determination Bysimultaneous Solution Nebulization and Laser AblationICPMS:Application to U-Pb Geochronologyo[J].Chemical Geology,2000,167:405-425.
HOSKIN P W O,BLACK L P.Metamorphic Zircon Formation by Solidstate Recrystallization of Protolith Igneous Zircon[J].Metamorphic Geol.,2000,18:423-439.
KOSLER J,FONNELAND H,SYLVESTER P.U-Pb Dating of Detrital Zircons for Sediment Provenancestudies—a Comparison of Laser Ablation ICPMS and SIMS Techniques[J].Chemical Geology,2002,182:605-618.
LUDWIG K R.Isoplot—a Plotting and Regression Program for Radiogenic-isolope Data[J].US Geological Survey Open—File Report,1991,39:91-445.
PIDGEON R T,NEMCHIN A A,HITCHEN G J.Internal Structures of Zircons from Archaean Granites from the Darling Range Batholiths:Implications for Zircon Stability and the Interpretation of Zircon U-Pb Ages[J].Contributions to Mineralogy and Petrology,1998,132:288-299.
TAO H F,WANG Q C,YANG X F,et al.Provenance and Tectonic Settinclastic Rocks In West Junggar,Xinjiang,China:A Case from the Hala-Alat Mountains[J].Journal of Asian Earth Science,2013,64:210-222.
WILLIAMS I S,BUICK A,CARTWRIGHT I.An Extended of Early Episode Mesoproterozoic Metamorphic Fluid Flow in the Reynold Region,Central Australia[J].J Metamorphic Geol,1996,14:29-47.
XU Z,HAN B F,REN R,et al.Ultramafic-mafic Melange,Island Arc and Postcollisional Intrusions in the Mayile Mountain,West Junggar,China:Implications for Paleozoic Intra-oceanic Subduction-accretion Process[J].Lithos,2012,132-133:141-161.