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Northwest Africa 11795 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11795 This is an OFFICIAL meteorite name. Abbreviation: NWA 11795 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 1270 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 93 approved meteorites classified as Lodranite. [show all] Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 26 May 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 11795 (NWA 11795) (Northwest Africa) Purchased: 2018 Classification: Primitive achondrite (Lodranite) History: The meteorite was purchased in Tindouf, Algeria, from a Sahrawi dealer. Physical characteristics: Brownish individual lacking any fusion crust. Petrography: The meteorite is a breccia predominantly composed of up to 3 mm sized olivine and orthopyroxene grains (mean diameter about 0.6 mm) with related fine-grained mineral debris. More minor phases include Ca-pyroxene, chromite, kamacite, troilite and Ni-bearing pyrrhotite. Ca-pyroxene often ocurrs as fine exsolution lamellae in low-Ca pyroxene and kamacite is mostly altered to Fe-oxides/hydroxides. No feldspar was found in the section studied. Geochemistry: olivine: Fa10.7±0.1, (Fa10.5-10.8, n=13, FeO/MnO=25±1); low-Ca pyroxene: Fs10.3±0.1Wo2.2±0.2 (Fs10.1-10.5Wo1.9-2.5, n=12, FeO/MnO=16±1); Ca-pyroxene: Fs4.6±0.2Wo43.6±0.5 (Fs4.3-4.9Wo42.8-44.9, n=12, FeO/MnO=11±1); Cr2O3 in Ca-pyroxene: 1.06±0.13 wt.% Classification: Lodranite according to mineral chemistry, grain size, and absence of feldspar. | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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