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| Northwest Africa 788 | |||||||||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 788 This is an OFFICIAL meteorite name. Abbreviation: NWA 788 Observed fall: No Year found: 2001 Country: (Northwest Africa) Mass:  12.93 kg | ||||||||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 191 approved meteorites classified as L5/6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||||||
| Comments: | Approved 30 Oct 2017 | ||||||||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 106:
Northwest Africa 788 (NWA 788) (Northwest Africa) Purchased: 2001 Mar Classification: Ordinary chondrite (L5/6) History: Purchased by Michael Farmer in March 2001 from a dealer in Casablanca, Morocco. Petrography: (A. Irving and S. Kuehner, UWS; A. Rubin, UCLA) Some well-formed chondrules occur within a recrystallized matrix containing altered metal and merrillite. An exotic ellipsoidal clast (1.7 mm long) in the studied thin section is composed of labradorite containing myriad, oriented inclusions of Cr-pleonaste and ilmenite with accessory baddeleyite and troilite; this is mantled by a reaction rim against the matrix composed mainly of sodic plagioclase wth minor olivine and kamacite. Geochemistry: Olivine (Fa25.0-25.8, N = 3), orthopyroxene (Fs21.1-22.1Wo1.7-1.6; N = 2), clinopyroxene (Fs7.7-9.8Wo44.4-44.0, N = 2), plagioclase in ellipsoidal clast (An58.9Or0.7), plagioclase in reaction rim on clast (An11.0Or5.5). Classification: Ordinary chondrite (L5/6). An unusual feature of this specimen is the presence of an exotic plagioclase-rich object containing oriented grains of oxide phases. Specimens: 190 g including one polished thin section at UCLA; 203.7 g at PSF; remainder with MFarmer. | ||||||||||||||||||||||||||||||||||||||||||
| Data from: MB106 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) UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 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) MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address) |
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| References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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| Photos: |
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| Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) | ||||||||||||||||||||||||||||||||||||||||||