caa a22 4500 445300566 CHVBK 20180317142556.0 cr unu---uuuuu 170323e20100401xx s 000 0 eng 10.1007/s11430-010-0015-1 doi (NATIONALLICENCE)springer-10.1007/s11430-010-0015-1 Cosmogenic 21Ne concentrations and exposure ages of summit bedrocks in the Grove Mountains, Antarctica [Elektronische Daten] [Ping Kong, Lin Ding, QingZhou Lai, FeiXin Huang] 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 concentrations of cosmogenic 21Ne and 22Ne in summit bedrock samples R9202 and R9203 from Grove Mountains, Antarctica, are (3.83±0.87)×108 and (5.2280.51)×108 atoms/g, respectively. The corresponding minimum exposure ages are 2.2±0.5 and 3.0±0.3 Ma. This indicates that the ice sheet in East Antarctica was uncovered the crest of Mount Harding, a typical nunatak in Grove Mountains, since at least mid-Pliocene. Science China Press and Springer-Verlag Berlin Heidelberg, 2010 21Ne nationallicence cosmogenic nuclide nationallicence exposure age nationallicence Antarctica nationallicence Grove Mountains nationallicence Kong Ping Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China aut Ding Lin Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100085, Beijing, China aut Lai QingZhou Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100085, Beijing, China aut Huang FeiXin Institute of Mineral Resources Research, China Metallurgical Geology Bureau, 100025, Beijing, China aut Science China Earth Sciences SP Science China Press 53/4(2010-04-01), 518-521 1674-7313 53:4<518 2010 53 11430 https://doi.org/10.1007/s11430-010-0015-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11430-010-0015-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kong Ping Key Laboratory of the Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, 100029, Beijing, China aut NATIONALLICENCE 700 1- Ding Lin Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100085, Beijing, China aut NATIONALLICENCE 700 1- Lai QingZhou Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, 100085, Beijing, China aut NATIONALLICENCE 700 1- Huang FeiXin Institute of Mineral Resources Research, China Metallurgical Geology Bureau, 100025, Beijing, China aut NATIONALLICENCE 773 0- Science China Earth Sciences SP Science China Press 53/4(2010-04-01), 518-521 1674-7313 53:4<518 2010 53 11430 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer