| 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 |
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|
タイトル |
Impact-induced phyllosilicate formation from olivine and water |
|
言語 |
en |
| 作成者 |
Furukawa, Yoshihiro
Kakegawa, Takeshi
Sekine, Toshimori
Nakazawa, Hiromoto
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| アクセス権 |
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アクセス権 |
open access |
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アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
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|
権利情報 |
(c) 2013 Elsevier Ltd. |
| 主題 |
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主題Scheme |
NDC |
|
主題 |
450 |
| 内容記述 |
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|
内容記述 |
Shock-recovery experiments on mixtures of olivine and water with gas (air) were performed in a previous study to demonstrate water-mineral interactions during impact events (Furukawa et al., 2007). The products of these former experiments were investigated in the present study using transmission electron microscopy, scanning electron microscopy, and X-ray powder diffraction with the aim of finding evidence of aqueous alteration. Serpentine formed on the surface of shocked olivine with well-developed mosaicism. The yield of serpentine depended on the water/olivine ratio in the starting material, indicating progressive serpentinization under water-rich conditions. Comminution and mosaicism were developed in shocked olivine grains. The temperature and pressure changes of the samples during the experiments were estimated by constructing Hugoniots for mixtures of olivine and water, combined with the results of an additional fracturing experiment on a shocked container. Pressures and temperatures reached 4.6-7.2 GPa and at least 230-390 degrees C, respectively, for 0.7 mu s during in-shock compression. Post-shock temperatures reached a maximum of similar to 1300 degrees C, when the shock wave reached the gas in the sample cavity. The serpentine formed after the post-shock temperature maximum, most likely when temperatures dropped to between 200 and 400 degrees C. This is the first experiment to demonstrate the formation of phyllosilicates using heat supplied by an impact. The present results and estimations suggest that phyllosilicates could form as a result of impacts into oceans as well as by impacts on terrestrial and Martian crustal rocks, and on some asteroidal surfaces, where liquid or solid H(2)O is available. A significant amount of phyllosilicates would have formed during the late heavy bombardment of meteorites on the Hadean Earth, and such phyllosilicates might have affected the prebiotic carbon cycle. (C) 2011 Elsevier Ltd. All rights reserved. |
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言語 |
en |
| 出版者 |
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出版者 |
Pergamon |
| 出版者 |
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出版者 |
Elsevier Science Ltd |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
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|
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 |
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|
出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 関連情報 |
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識別子タイプ |
DOI |
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関連識別子 |
10.1016/j.gca.2011.08.029 |
| 関連情報 |
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|
識別子タイプ |
DOI |
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|
関連識別子 |
http://dx.doi.org/10.1016/j.gca.2011.08.029 |
| 関連情報 |
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|
識別子タイプ |
URI |
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|
関連識別子 |
http://ees.elsevier.com/gca/ |
| 収録物識別子 |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
0016-7037 |
| 収録物識別子 |
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収録物識別子タイプ |
NCID |
|
収録物識別子 |
AA00655038 |
| 開始ページ |
|
|
開始ページ |
6461 |
| 書誌情報 |
Geochimica et Cosmochimica Acta
Geochimica et Cosmochimica Acta
巻 75,
号 21,
p. 6461-6472,
発行日 2011
|
| 旧ID |
34743 |
GeochimCosmochimActa_75_6461.pdf (1.1 MB)
