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Northwest Africa 10812 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10812 This is an OFFICIAL meteorite name. Abbreviation: NWA 10812 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 126.5 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 3298 approved meteorites (plus 1 unapproved name) classified as LL5. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||
Comments: | Approved 5 Aug 2016 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 105:
Northwest Africa 10812 (NWA 10812) (Northwest Africa) Purchased: 2016 Classification: Ordinary chondrite (LL5) History: One stone weighing 126.5 g was found in Morocco in 2016. David Holden acquired the sample from a meteorite prospector in Erfoud 2016. Physical characteristics: The stone is dark brown in color, has a flattened rectangular shape and is ~95% covered by a weathered fusion crust containing contraction cracks. The interior cut face shows a texture composed of a light-colored, football-shaped region surrounded by a darker brown weathered area. Weathered and unweathered flakes of FeNi and FeS are visible on the surface. Petrography: Description and classification (A. Love, App): Sample displays distinct and indistinct chondrules with an average diameter of 687 μm (n=42), within a recrystallized matrix. Chondrule have turbid to devitirified mesostasis. Many chondrules are surrounded by rims of Fes and FeNi metal. Sample contains ~3 vol% FeNi metal grains. Geochemistry: (A. Love, App) Olivine Fa26.9±0.5, N=6; low Ca pyroxene Fs23.6±0.3Wo1.7±0.1, N=6. Classification: Ordinary chondrite (LL5, S4, W2) Specimens: An endcut and 2 slices and several small fragments weighing 21.4 g, and a polished thin section are currently on deposit at App. David Holden has the remaining mass. | ||||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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