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| Northwest Africa 8472 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 8472 This is an OFFICIAL meteorite name. Abbreviation: NWA 8472 Observed fall: No Year found: 2014 Country: Morocco Mass:  391 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 462 approved meteorites classified as LL3. [show all] Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||||||||
| Comments: | Approved 10 Jul 2014 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 103:
Northwest Africa 8472 (NWA 8472) Morocco Purchased: May 2014 Classification: Ordinary chondrite (LL3) History: Purchased from a dealer in Morocco in May of 2014 by A. Jonikas Physical characteristics: one stone contianing weathered fusion crust, cut surface reveals very closely packed chondrules of various shapes and sizes and a small dark carbonaceous clast set in a grayish-brown matrix Petrography: (A. Rubin, UCLA) Microprobe examination of a polished mount shows that chondrules lack clear glassy mesostasis. There are numerous grains of polysynthetically twinned low-Ca pyroxene. Chondrules are large, averaging ~600 μm in diameter, consistent with LL. There is very little metal present, consistent with LL. Even though the rock is W4 and most of the metal has been weathered, there is not that much limonite, indicating that there was little metal initially. Geochemistry: Olivine Fa12.0±3.9 (Fa3.7-15.9, n=14); Low-Ca pyroxene Fs8.6±10.8Wo1.0±1.0 (Fs6.2-20.5, n=18). Classification: Ordinary chondrite (LL3); subtype estimated >3.5 due to chondrules lacking clear glassy mesostases. Specimens: 21.8 g type specimen including a probe mount, UCLA; A. Jonikas hold the main mass | ||||||||||||||||||||||||||||||
| Data from: MB103 Table 0 Line 0: |
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| Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) |
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| References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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| Photos: |
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Geography:
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Statistics: This is 1 of 1991 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||