The Kumtag meteorite strewn field was found in the Kumtag desert, 132 km south of Hami city in the Xinjiang province, China. It is an ellipse of 2.5 x 7.9 km, with a long axis extending along the northeast-southwest direction. The largest individual meteorite of the strewn field weighs about 10 kg; the smallest individual has a mass of only 27 g. In total, more than 100 individuals with a total mass of more than 180 kg were collected. The location and the distribution of the fragments suggest that the Kumtag meteoroid entered the atmosphere in the direction Northeast-Southwest. All meteorites collected in this strewn field are samples from the same unique meteorite shower. The Kumtag meteorite is an H5 ordinary chondrite with a shock stage S2, and a weathering grade W2. The cosmic ray exposure age of Kumtag is 6.7 +/- 0.8 Ma, which is rather typical for H chondrites and which indicates that Kumtag was derived from the massive impact event on its parent body similar to 7 Ma ago. A significant amount of He has been lost during certain unknown processe(s) before the Kumtag meteorite was ejected from its parent body. (C) 2021 COSPAR. Published by Elsevier B.V. All rights reserved.
Publication name |
ADVANCES IN SPACE RESEARCH Volume: 67 Issue: 12 Pages: 4089-4098 DOI: 10.1016/j.asr.2021.02.020 Published: JUN 15 2021 |
Author(s) |
Du, Ke; Li, Shijie; Leya, Ingo; Smith, Thomas; Zhang, Dongliang; Wang, Peng |
Corresponding author(s) |
LI Shijie lishijielpsc@mail.gyig.ac.cn -Center for Lunar and Planetary Sciences, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China -Chinese Academy of Sciences Center for Excellence in Comparative Planetology, Hefei 230026, China | View here for the details
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