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Northwest Africa 10636 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10636 This is an OFFICIAL meteorite name. Abbreviation: NWA 10636 Observed fall: No Year found: 2014 Country: Morocco Mass: 14.14 kg | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 451 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||||||||||||||||
Comments: | Approved 7 May 2016 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 105:
Northwest Africa 10636 (NWA 10636) Morocco Purchased: February 2014 Classification: HED achondrite (Howardite) History: Purchased from Moroccan meteorite dealer in 2014. Physical characteristics: Physical Characteristics: Single stone covered with thin caliche layer. Saw cut shows finely brecciated texture with white, gray, and black clasts. Petrography: (K. Domanik and F. Stephan, UAz) Microprobe examination of a polished mount shows a brecciated texture with widely varying clast sizes consisting of approx. 55% basaltic eucrite, 30% cumulate eucrite, and 15% diogenite components. A few large (2 mm) ophitic textured cumulate eucrite fragments are present. Two populations of basaltic pigeonite are observed; the first with extremely fine-scale exsolution lamellae; the second with Fe-enriched rims, no exsolution lamellae, and cross-cutting Fe-rich olivine veins. Accessory silica, chromite, ilmenite, Fe-Ni metal, and minor interstitial melt areas are also present. Geochemistry: Mineral compositions and geochemistry: (K. Domanik and F. Stephan, UAz) Diogenite minerals: low-Ca pyroxene Fs25.3±3.1Wo2.6±0.9, Fe/Mn=29±3, n=24; olivine Fa33.9, Fe/Mn=50, n=1. Basaltic eucrite minerals: low-Ca pyroxene Fs58.3±3.6Wo2.8±0.6, Fe/Mn=31±1, n=15; pigeonite Fs59.4±6.0Wo7.6±1.5, Fe/Mn=29±3, n=4; zoned pigeonite cores Fs34.5±0.3Wo6.6±1.1, Fe/Mn=29±2, n=17; augite Fs31.9±0.1Wo40.0±3.0, Fe/Mn=33±2, n=2; plagioclase An86.2±1.7Ab13.1±1.6Or0.6±0.2, n=5; olivine veins Fa71.3±5.9 Fe/Mn=43±2, n=3. Cumulate eucrite minerals: low-Ca pyroxene Fs49.1±4.2Wo2.7±0.6, Fe/Mn=30±1, n=16; pigeonite Fs44.9±0.3Wo5.7±0.2, Fe/Mn=27, n=2; augite Fs21.6±2.5Wo42±1.1, Fe/Mn=28±2, n=8; plagioclase An92.5±1.7Ab7.2±1.7Or0.3±0.1, n=6. Classification: Achondrite (howardite) Specimens: 42 g including probe mount on deposit at UAz, Fredric Stephan holds the main mass. | ||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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Institutions and collections |
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012) |
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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 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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