The Kumtag 016 L5 strewn field, Xinjiang Province, China

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	The Kumtag 016 L5 strewn field, Xinjiang Province, China
	Xiaojia ZENG; Shijie LI; Ingo LEYA; Shijie WANG; Thomas SMITH; Yang LI; Peng WANG
	2018
发表期刊	Meteoritics & Planetary Science
页码	1-18
摘要	The Kumtag 016 strewn fifield was found in the eastern part of the Kumtag desert, Xinjiang Province, China. In this study, 24 recovered meteorites have been characterized by a suite of different analytical techniques to investigate their petrography, mineralogy, bulk trace elements, noble gas isotopic composition, density, and porosity. We attribute to the strewn fifield 22 L5 chondrites with shock stage S4 and weathering grade W2–W3. Two different meteorites, Kumtag 021, an L4 chondrite and Kumtag 032, an L6 chondrite, were recognized within the strewn fifield area. Moreover, Kumtag 003, an H5 chondrite, was previously found in the same area. We infer that the Kumtag 016 strewn fifield most likely consists of at least four distinct meteorite falls. The effects of terrestrial weathering on the studied meteorites involve sulfifide/metal alteration, chemical changes (Sr, Ba, Pb, and U enrichments and depletion in Cr, Co, Ni, and Cs abundances), and physical modififications (decrease of grain density and porosity). Measurements of the light noble gases indicate that the analyzed Kumtag L5 samples contain solar wind-implanted noble gases with a 20Ne/22Ne ratio of ~12.345. The cosmic-ray exposure (CRE) ages of the L5 chondrites are in a narrow range (3.6 1.4 Ma to 5.2 0.4 Ma). For L4 chondrite Kumtag 021 and L6 chondrite Kumtag 032, the CRE ages are 5.9 0.4 Ma and 4.7 0.8 Ma, respectively.The Kumtag 016 strewn fifield was found in the eastern part of the Kumtag desert, Xinjiang Province, China. In this study, 24 recovered meteorites have been characterized by a suite of different analytical techniques to investigate their petrography, mineralogy, bulk trace elements, noble gas isotopic composition, density, and porosity. We attribute to the strewn fifield 22 L5 chondrites with shock stage S4 and weathering grade W2–W3. Two different meteorites, Kumtag 021, an L4 chondrite and Kumtag 032, an L6 chondrite, were recognized within the strewn fifield area. Moreover, Kumtag 003, an H5 chondrite, was previously found in the same area. We infer that the Kumtag 016 strewn fifield most likely consists of at least four distinct meteorite falls. The effects of terrestrial weathering on the studied meteorites involve sulfifide/metal alteration, chemical changes (Sr, Ba, Pb, and U enrichments and depletion in Cr, Co, Ni, and Cs abundances), and physical modififications (decrease of grain density and porosity). Measurements of the light noble gases indicate that the analyzed Kumtag L5 samples contain solar wind-implanted noble gases with a 20Ne/22Ne ratio of ~12.345. The cosmic-ray exposure (CRE) ages of the L5 chondrites are in a narrow range (3.6 1.4 Ma to 5.2 0.4 Ma). For L4 chondrite Kumtag 021 and L6 chondrite Kumtag 032, the CRE ages are 5.9 0.4 Ma and 4.7 0.8 Ma, respectively.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/42920512-1/10109
专题	月球与行星科学研究中心
作者单位	1.Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 2.University of Chinese Academy of Sciences, Beijing 10049, China 3.Physics Institute, University of Bern, CH-3012 Bern, Switzerland 4.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China 5.Division of Mines and Geology, Sixth Geological Brigade, Hami 839000, China
推荐引用方式 GB/T 7714	Xiaojia ZENG；Shijie LI；Ingo LEYA；Shijie WANG；Thomas SMITH；Yang LI；Peng WANG. The Kumtag 016 L5 strewn field, Xinjiang Province, China[J]. Meteoritics & Planetary Science,2018:1-18.
APA	Xiaojia ZENG；Shijie LI；Ingo LEYA；Shijie WANG；Thomas SMITH；Yang LI；Peng WANG.(2018).The Kumtag 016 L5 strewn field, Xinjiang Province, China.Meteoritics & Planetary Science,1-18.
MLA	Xiaojia ZENG；Shijie LI；Ingo LEYA；Shijie WANG；Thomas SMITH；Yang LI；Peng WANG."The Kumtag 016 L5 strewn field, Xinjiang Province, China".Meteoritics & Planetary Science (2018):1-18.

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