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Northwest Africa 11987 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11987 This is an OFFICIAL meteorite name. Abbreviation: NWA 11987 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: 98.5 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 836 approved meteorites (plus 1 unapproved name) classified as L3. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
Comments: | Approved 27 Jun 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 11987 (NWA 11987) (Northwest Africa) Purchased: 2005 Classification: Ordinary chondrite (L3) 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) Fairly closely packed, well-formed chondrules (apparent diameter 705±260 μm, N=20) are set in a finer-grained matrix containing stained metal. Geochemistry: Olivine Fa29.8±15.5 (range Fa1.1-58.4), Cr2O3 in ferroan examples 0.04-0.27 wt.%, mean 0.11±0.08 wt.%, N = 7. Low-Ca pyroxene Fs11.6±11.8Wo0.3±0.1 (range Fs3.2-19.9Wo0.2-0.3), N = 2; Fs54.8Wo1.5. High-Ca pyroxene Fs18.2Wo36.1. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.63. Classification: Ordinary chondrite (L3). Specimens: The entire specimen including one polished thin section is at PSF. | ||||||||||||||||||||||||||||||
Data from: MB108 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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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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