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ID 48195
本文ファイル
著者
Kurosawa, Kosuke
Moriwaki, Ryota
Komatsu, Goro
Okamoto, Takaya
Sakuma, Hiroshi
Yabuta, Hikaru 大学院理学研究科 広大研究者総覧
Matsui, Takafumi
抄録(英)
Dry lakebeds might constitute large volatile reservoirs on Mars. Hypervelocity impacts onto ancient dry lakebeds would have affected the volatile distribution on Mars. We developed a new experimental method to investigate the response of evaporitic minerals (halite and gypsum) to impact shocks in an open system. This technique does not result in chemical contamination from the operation of the gas gun. The technique is termed the “two‐valve method,” and the gun system is located in the Planetary Exploration Research Center, Chiba Institute of Technology, Japan. We detected the vaporization of halite at 31 GPa and devolatilization from gypsum at 11 GPa, suggesting that impact‐induced volatile release from dry lakebeds has periodically occurred throughout Martian history. The vaporization of halite deposits might have enhanced the production of perchlorates, which are found globally on Mars. The water loss from gypsum possibly explains the coexisting types of Ca‐sulfates found in Gale Crater.
内容記述
This work was supported by ISAS/JAXA as a collaborative program with its Hypervelocity Impact Facility.
掲載誌名
Geophysical Research Letters
46巻
13号
開始ページ
7258
終了ページ
7267
出版年月日
2019-07-23
出版者
American Geophysical Union
AGU
ISSN
0094-8276
1944-8007
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
An edited version of this paper was published by AGU. Copyright 2019 American Geophysical Union.
関連情報URL
部局名
理学研究科
備考
Edited version/PDF may be used in an institutional repository after an embargo period of 6 months.