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Grove Mountains 021729 | |||||||||||||||||||||||
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Basic information | Name: Grove Mountains 021729 This is an OFFICIAL meteorite name. Abbreviation: GRV 021729 Observed fall: No Year found: 2003 Country: Antarctica [Collected by Chinese Antarctic Research Expedition (CARE)] Mass: 2.97 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||
Comments: |
Approved 5 Mar 2008 Revised 4 Aug 2008: final writeup | ||||||||||||||||||||||
Writeup |
Writeup from MB 93:
Grove Mountains 021729 72°47'23''S, 75°17'25''E Grove Mountains, Antarctica Find: 20 January 2003 Achondrite (ureilite) History and Physical characteristics: A 2.97 g, mostly black fusion encrusted stone was recovered from a moraine by J. Li. Petrography: (A. Zhang, PMO; H. Wang, NU) It shows a cumulate texture of coarse-grained olivine and pyroxene (up to 1.8 mm in length). Triple junctions with an angle of 120° are common among coarse-grained silicates. Grain boundaries between olivine and pyroxene are filled with fine-grained graphite and limonite. Olivine has reduced rims composed of fine-grained forsterite and Ni-poor metal, which also occur along fractures within olivine grains. Some of thegraphite veins intrude into olivine and pyroxene crystals as a plate. Mineral compositions and Geochemistry: (A. Zhang, PMO; H. Wang, NU) Olivine varies in composition from Fa2.7 to Fa23.1 with an average of Fa12.9±7.6. The olivine core has a composition of Fa20.8. Pyroxene also has variable composition (Fs3.9-19.7, average = Fs14.9±5.4; Wo9.4-30.3, average = Wo12.5±5.3). The pyroxene core has a composition of Fs19.1Wo10.8. Classification: Achondrite (ureilite). Type specimens: PRIC holds the main mass and a polished section. | ||||||||||||||||||||||
Data from: MB93 Table 6 Line 244: |
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Institutions and collections |
PRIC: Polar Research Institute of China, 451 Jinqiao Road, Shanghai 200129, China; Website (institutional address; updated 9 Apr 2013) PMO: Purple Mountain Observatory, Nanjing, China (institutional address; updated 16 Dec 2011) NU: School of Earth Sciences and Engineering, Nanjing University, #163 Xianlin Avenue, Nanjing 210023, China, China (institutional address; updated 18 Jul 2015) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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Geography: |
Statistics: This is 1 of 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||
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Revision history: |
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