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| Northwest Africa 13333 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 13333 This is an OFFICIAL meteorite name. Abbreviation: NWA 13333 Observed fall: No Year found: 2019 Country: Morocco Mass:  957 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 451 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 13 Jun 2020 | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 109:
Northwest Africa 13333 (NWA 13333) Morocco Purchased: 2019 Classification: Ordinary chondrite (LL3) History: Thierry Simard purchased the 957g sample from a meteorite dealer in Erfoud, Morocco, in 2019. Physical characteristics: Sample is brownish-yellow in color, has a rounded, irregular shape and displays a heavily sand-blasted exterior with visible chondrules on the outer surface. Abundant chondrules and clasts are visible on the cut face showing the interior of the sample. Petrography: Description and classification (A. Love and J. Serensics, App) Sample is a breccia composed of poorly equilibrated, elongated chondrules (average aspect ratio of 1.54, n=27) that share preferred orientation (average apparent diameter 586 μm, n=90) set within a clastic host containing containing mineral and chondrule fragments and ~1 vol% FeNi metal. Clinoenstatite is present. Geochemistry: (J. Serensics, App) Olivine Fa22.5±6.6 (range Fa9.8-29.8), Fe/Mn=51.6±9.8, n=14. Cr2O3 in type II chondrules has an average of 0.1±0.1 wt%, n=14); low Ca-pyroxene Fs14.3±8.3Wo1.7±2.8 (range Fs2.2-24.4Wo0.2-2.2), n=14. Classification: Ordinary chondrite (LL3, C-S5 W2) Based on texture, metal abundance, chondrule diameter and magnetic susceptibility this sample is an LL chondrite breccia. Maskelynite, yellow stained olivine melt pockets and shock veins indicate shock level of C-S5. Specimens: Thierry Simard holds the main mass. An end cut, several smaller slices and fragments that comprise the 20.05 g type specimen and a polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||
| Data from: MB109 Table 0 Line 0: |
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| Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) |
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| Catalogs: |
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| References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography:
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Statistics: This is 1 of 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||||