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| Northwest Africa 7406 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 7406 This is an OFFICIAL meteorite name. Abbreviation: NWA 7406 Observed fall: No Year found: 2010 Country: Morocco Mass:  356 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 26 approved meteorites classified as EL3. [show all] Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 3), and Enstatite-rich meteorites | ||||||||||||||||||||||||||||||||
| Comments: | Approved 23 Apr 2015 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 104:
Northwest Africa 7406 (NWA 7406) Morocco Purchased: Dec 2010 Classification: Enstatite chondrite (EL3) Physical characteristics: A single, complete, desert-varnished stone was found. Petrography: (A.E. Rubin, UCLA) Chondrules average ~500 μm in apparent diameter which is very close to the 550-μm average chondrule diameter found for EL3 (Rubin, 2010); most are RP and PP types, but there are also rare POP chondrules and chondrule fragments. Many low-Ca pyroxene grains exhibit polysynthetic twins. The rock is so weathered that almost no opaque grains have survived -- only a few grains of troilite and metal. Kamacite: 94.2% Fe, 4.6% Ni, 0.55% Si, 0.30% Co, 0.10% P, 0.09% Cr, 0.07% Mg (n=3). Ti and Mn were below detection limits. Abundant grains of metallic copper <5 μm were observed, usually within matrix enstatite grains. | ||||||||||||||||||||||||||||||||
| Bibliography: |
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| Data from: MB104 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) JUtas: Jason Utas, United States (private address; updated 8 Jun 2010) |
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| References: | Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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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) | ||||||||||||||||||||||||||||||||