Cosmogenic ~(21)Ne concentrations and exposure ages of summit bedrocks in the Grove Mountains,Antarctica |
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| Authors: | KONG Ping DING Lin LAI QingZhou & HUANG FeiXin Key Laboratory of the Earth's Deep Interior |
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| Institution: | KONG Ping1,2,DING Lin2,LAI QingZhou2 & HUANG FeiXin3 1 Key Laboratory of the Earth's Deep Interior,Institute of Geology , Geophysics,Chinese Academy of Sciences,Beijing 100029,China,2 Key Laboratory of Continental Collision , Plateau Uplift,Institute of Tibetan Plateau Research,Beijing 100085,3 Institute of Mineral Resources Research,China Metallurgical Geology Bureau,Beijing 100025 |
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| Abstract: | Various sources of 21Ne and 22Ne exist in surface rocks:cosmogenic,in situ nucleogenic from internal U and Th,trapped crustal nucleogenic and trapped atmospheric.This paper reports the first measurement,in China,of cosmogenic 21Ne and 22Ne in surface bedrocks.We developed a unique sample pre-treatment procedure that effectively removed inclusions inside quartz grains,and thus maximally reduced nucleogenic contributions of 21Ne and 22Ne.Step-heating experiments show that concen-trations of cosmogenic 21Ne an... |
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| Keywords: | 21Ne cosmogenic nuclide exposure age Antarctica Grove Mountains |
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