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Northwest Africa 7913 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7913 This is an OFFICIAL meteorite name. Abbreviation: NWA 7913 Observed fall: No Year found: 2013 Country: Morocco Mass: 95 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 54 approved meteorites classified as Eucrite-cm. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 27 Jul 2013 | ||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7913 (NWA 7913) Morocco Purchased: 2013 Classification: HED achondrite (Eucrite, cumulate) History: Purchased by Adam Bates from a Moroccan meteorite dealer in 2013. Physical characteristics: Single stone, brown weathered exterior, saw cut reveals dark-gray crystalline texture. Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows grains (50 to 200 μm) of equilibrated pyroxene and plagioclase with numerous triple junctions, most pyroxene shows exsolution lamellae. Ubiquitous silica, chromite, and troilite. Geochemistry: (C. Agee and L. Burkemper, UNM) Low Ca-pyroxene Fs41.4±4.2Wo7.0±6.7, Fe/Mn=27±1, n=17; augite Fs19.4±0.6, Fe/Mn=23±2, n=4; plagioclase An94.7±0.3, n=7. Classification: HED Achondrite (Eucrite, cumulate), equilibrated Mg-rich eucrite, low-Ca pyroxenes show Ca-enrichment trend. Specimens: 19 g including a probe mount on deposit at UNM, Adam Bates holds the main mass. | ||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 2068 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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