Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies
The shock metamorphism of 47 H group chondrites (H-chondrites) from the Grove Mountains including undulatory extinction, planar fractures, mosaic extinction, shock veins and pockets, and dendritic eutectic metal-sulfide, is observed through optical microscope. The textures and assemblages of shock v...
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ftarcticportal:oai:generic.eprints.org:2416 2023-10-09T21:44:11+02:00 Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies Baohua, Wang Bingkui, Miao Jiang, Wang Jian, Zhang 2011-06 application/pdf http://library.arcticportal.org/2416/ http://library.arcticportal.org/2416/1/A20110203.pdf en eng Polar Research Institute of China - PRIC http://library.arcticportal.org/2416/1/A20110203.pdf Baohua, Wang and Bingkui, Miao and Jiang, Wang and Jian, Zhang (2011) Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies. Advances in Polar Science, 22 (2). pp. 81-91. Space Article PeerReviewed 2011 ftarcticportal 2023-09-20T22:54:11Z The shock metamorphism of 47 H group chondrites (H-chondrites) from the Grove Mountains including undulatory extinction, planar fractures, mosaic extinction, shock veins and pockets, and dendritic eutectic metal-sulfide, is observed through optical microscope. The textures and assemblages of shock veins in these H-chondrites are examined by the scanning electron microscope. Based on observations of the above shock effects, the shock stages of the 47 H-chondrites are classified into S1(5), S2(19), S3(14), S4(8) and S5(1). Of these H-chondrites, GRV 022469 has the highest(S5) shock stage. The comparison of shock stages in these H-chondrites with L group chondrites(L-chondrites) indicates that the shock metamorphism of H-chondrites is relatively low (except for GRV 022469, they are all lower than S5). A scenario for the history of the H-chondrite parent body is proposed that suggests the duration of the shock events in the H-chondrite parent bodies was much shorter than those in L-chondrite parent bodies. Also, the pressure may have been released more quickly, and consequently, the high-pressure phases should be easily preserved. However, the parent bodies of the H-chondrites may have been exposed to high temperatures for a longer time after the shock event, so the high-pressure phases formed by solid transformation might have retro-metamorphosed to low-pressure ones; its peak pressure is estimated to be less than 15 GPa. Wadsleyite was found in a shock vein in GRV022469, as confirmed by the Raman spectrometer. Petrological and mineralogical characteristics support the idea that the wadsleyite was formed by solid-state transformation. Article in Journal/Newspaper Advances in Polar Science Antarc* Antarctica East Antarctica Polar Science Polar Science Arctic Portal Library East Antarctica Grove Mountains ENVELOPE(75.000,75.000,-72.750,-72.750) |
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collection |
Arctic Portal Library |
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ftarcticportal |
language |
English |
topic |
Space |
spellingShingle |
Space Baohua, Wang Bingkui, Miao Jiang, Wang Jian, Zhang Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies |
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Space |
description |
The shock metamorphism of 47 H group chondrites (H-chondrites) from the Grove Mountains including undulatory extinction, planar fractures, mosaic extinction, shock veins and pockets, and dendritic eutectic metal-sulfide, is observed through optical microscope. The textures and assemblages of shock veins in these H-chondrites are examined by the scanning electron microscope. Based on observations of the above shock effects, the shock stages of the 47 H-chondrites are classified into S1(5), S2(19), S3(14), S4(8) and S5(1). Of these H-chondrites, GRV 022469 has the highest(S5) shock stage. The comparison of shock stages in these H-chondrites with L group chondrites(L-chondrites) indicates that the shock metamorphism of H-chondrites is relatively low (except for GRV 022469, they are all lower than S5). A scenario for the history of the H-chondrite parent body is proposed that suggests the duration of the shock events in the H-chondrite parent bodies was much shorter than those in L-chondrite parent bodies. Also, the pressure may have been released more quickly, and consequently, the high-pressure phases should be easily preserved. However, the parent bodies of the H-chondrites may have been exposed to high temperatures for a longer time after the shock event, so the high-pressure phases formed by solid transformation might have retro-metamorphosed to low-pressure ones; its peak pressure is estimated to be less than 15 GPa. Wadsleyite was found in a shock vein in GRV022469, as confirmed by the Raman spectrometer. Petrological and mineralogical characteristics support the idea that the wadsleyite was formed by solid-state transformation. |
format |
Article in Journal/Newspaper |
author |
Baohua, Wang Bingkui, Miao Jiang, Wang Jian, Zhang |
author_facet |
Baohua, Wang Bingkui, Miao Jiang, Wang Jian, Zhang |
author_sort |
Baohua, Wang |
title |
Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies |
title_short |
Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies |
title_full |
Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies |
title_fullStr |
Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies |
title_full_unstemmed |
Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies |
title_sort |
shock effects and the classification of h-chondrites from the grove mountains, east antarctica: implications for the shock history of h-chondrite parent bodies |
publisher |
Polar Research Institute of China - PRIC |
publishDate |
2011 |
url |
http://library.arcticportal.org/2416/ http://library.arcticportal.org/2416/1/A20110203.pdf |
long_lat |
ENVELOPE(75.000,75.000,-72.750,-72.750) |
geographic |
East Antarctica Grove Mountains |
geographic_facet |
East Antarctica Grove Mountains |
genre |
Advances in Polar Science Antarc* Antarctica East Antarctica Polar Science Polar Science |
genre_facet |
Advances in Polar Science Antarc* Antarctica East Antarctica Polar Science Polar Science |
op_relation |
http://library.arcticportal.org/2416/1/A20110203.pdf Baohua, Wang and Bingkui, Miao and Jiang, Wang and Jian, Zhang (2011) Shock effects and the classification of H-chondrites from the Grove Mountains, East Antarctica: Implications for the shock history of H-chondrite parent bodies. Advances in Polar Science, 22 (2). pp. 81-91. |
_version_ |
1779319965890904064 |