首页|SHRIMP U-Pb zircon geochronology of granites from Sansom Island, Prydz Bay, East Antarctica

SHRIMP U-Pb zircon geochronology of granites from Sansom Island, Prydz Bay, East Antarctica

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Sansom Island consists of two low nunataks in Sandefjord Bay,a marginal gulf of Prydz Bay,East Antarctica.These nunataks are composed of two kinds of undeformed biotite granites,and these granites have been dated by ion-microprobe U-Pb zircon geochronology.The zircons from these two samples yield SHRIMP zircon U-Pb concordant ages of 516±5 Ma and 495.8±4.2 Ma,respectively.The results indicate that these granites were emplaced in two pulses in the Cambrian,and further demonstrates the Pan-African event that has overprinted this area.The age of ca.516 Ma suggests that the undeformed Sansom Island Granite had a different geological history from the Landing Bluff Granite,which contains deformed granite xenoliths dated at ca.503 Ma,and probably indicates regional variations in the age and intensity of deformation.

GraniteSansom IslandSHRIMP U-Pb zircon geochronologyEast Antarctica

CUI Yingchun、LIU Xiaochun、LIU Chenguang、LIU Jianhui

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Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, SOA, Qingdao 266061, China

Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061,China

Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China

Beijing SHRIMP Centre, Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China

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Prof.Simon Harley,Prof.Ian Fitzsimons and an anonymous reviewer are thanked for their critical reviews that improved the manuscrChinese Polar Environment Comprehensive Investigation and Assessment ProgramsChinese Polar Environment Comprehensive Investigation and Assessment ProgramsTaishan Scholar ProjectFundamental Research Funds for National Public Research Institutes of ChinaFundamental Research Funds for National Public Research Institutes of China

41530209CHINARE2015-02-05CHINARE2017-04-03TSPD201610072009T022014T01

2018

极地科学进展(英文版)
中国极地研究中心,国家海洋局极地考察办公室 (Polar Research Institute of China, Chinese Arctic and Antarctic Administration)

极地科学进展(英文版)

CSTPCDCSCD
影响因子：0.145
ISSN：1674-9928
年,卷(期)：2018.29(2)
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