| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Direct evidence for decomposition of antigorite under shock loading |
|
言語 |
en |
| 作成者 |
Sekine, Toshimori
Meng, Chuanmin
Zhu, Wenjun
He, Hongliang
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
(c) 2012 by the American Geophysical Union. |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Hugoniot |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
decomposition |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
density decrease |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
exothermic |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
impact behavior |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
serpentine |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
450 |
| 内容記述 |
|
|
内容記述 |
Detailed wave profiles of antigorite (a serpentine mineral) under plate-impact shock loading have been measured to a pressure of 131 GPa in order to understand its dynamic behavior because serpentine is present in pristine meteorites as well as in the Earth mantle. All the profiles indicate single wave structures, and a sudden decrease in density was detected at similar to 60 GPa with increasing pressure when shock-loaded for a long duration (similar to 0.6 mu s) using a thick flyer. Such a drop in density also was observed during recompression by a high-impedance window material (LiF). Although exothermic decomposition is generally considered to be fast, the decomposition of antigorite under shock loading requires a reaction time so that the Hugoniot may represent a metastable state at which stable phase cannot appear in a timely way. Based on these observations, antigorite decomposes exothermically into an assemblage of either brucite + stishovite + periclase or brucite + perovskite above a shock pressure of 60 GPa, but does not dehydrate endothermically into assemblages with water fluid. The observed dynamic behavior of serpentine, coupled with the previous results of the shock-recovered serpentines, reinforces that serpentine plays a key role to carry water within the snowline of the solar system. |
|
言語 |
en |
| 出版者 |
|
|
出版者 |
American Geophysical Union |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1029/2011JB008439 |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1029/2011JB008439 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0148-0227 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA12077675 |
| 開始ページ |
|
|
開始ページ |
B03212 |
| 書誌情報 |
Journal of Geophysical Research - Solid Earth
Journal of Geophysical Research - Solid Earth
巻 117,
p. B03212,
発行日 2012
|
| 旧ID |
34742 |
JGeophysRes-SolidEarth_117_B03212.pdf (479.6 KB)
