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ID 48195
creator
Kurosawa, Kosuke
Moriwaki, Ryota
Komatsu, Goro
Okamoto, Takaya
Sakuma, Hiroshi
Matsui, Takafumi
abstract
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.
description
This work was supported by ISAS/JAXA as a collaborative program with its Hypervelocity Impact Facility.
journal title
Geophysical Research Letters
volume
Volume 46
issue
Issue 13
start page
7258
end page
7267
date of issued
2019-07-23
publisher
American Geophysical Union
AGU
issn
0094-8276
1944-8007
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
An edited version of this paper was published by AGU. Copyright 2019 American Geophysical Union.
relation url
department
Graduate School of Science
note
Edited version/PDF may be used in an institutional repository after an embargo period of 6 months.



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