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Northwest Africa 11867 | |||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11867 This is an OFFICIAL meteorite name. Abbreviation: NWA 11867 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: 23.4 g | ||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 3 approved meteorites classified as L3-7. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||||
Comments: | Approved 2 Aug 2020 | ||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 11867 (NWA 11867) (Northwest Africa) Purchased: 2005 Classification: Ordinary chondrite (L3-7) History: Purchased by an anonymous collector from a dealer at the Munich Show in 2005, subsequently acquired by the Hollis Collection and then donated to PSF. Petrography: (A. Irving and S. Kuehner, UWS; P. Carpenter, WUSL) Breccia containing multiple components in a sparse matrix containing stained metal. Isolated well-formed, unequilibrated chondrules (apparent diameter 800±340 µm, N = 21)are present, together with equilibrated Type 4 clasts, Type 5 clasts and rare Type 7 clasts (with poikiloblastic textures devoid of remnant chondrules). Geochemistry: Olivine (Fa22.6±9.1, range Fa6.9-33.1, N = 7; Cr2O3 in all ferroan examples <0.03 wt.%), orthopyroxene (Fs5.1±3.8Wo0.4±0.2, range Fs0.8-8.0Wo0.5-0.6, N = 3), clinopyroxene (Fs2.0Wo41.9; Fs7.4Wo44.4; N = 2), olivine in Type 5 lithic clast (Fa24.9±0.1, range Fa24.8-25.1, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.73. Classification: Ordinary chondrite (L3-7 breccia). Affinity to L chondrites is established from olivine composition in equilibrated lithic clasts and bulk magnetic susceptibility. Specimens: The entire specimen including one polished thin section is at PSF. | ||||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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