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Northwest Africa 12013 | |||||||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12013 This is an OFFICIAL meteorite name. Abbreviation: NWA 12013 Observed fall: No Year found: 2018 Country: (Northwest Africa) Mass: 332 g | ||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 628 approved meteorites (plus 1 unapproved name) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||||||||||||||||||
Comments: | Approved 20 Oct 2018 | ||||||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 12013 (NWA 12013) (Northwest Africa) Purchased: 2018 Classification: Carbonaceous chondrite (CV3) History: A single stone weighing 332.1 g was found in Morocco and subsequently purchased by Blaine Reed at the 2018 Tucson Gem and Mineral Show. Physical characteristics: The stone is dark-orangish-brown in color, has a flattened ovoid shape, lacks fusion crust and has a weathered exterior with some chondrules protruding from the surface. The cut face showing the interior of the stone is dark greenish-brown and shows readily discernible dark-colored chondrules and irregular to circular dark-gray metallic grains. Petrography: Description and classification (Anthony Love, App): Sample contains distinct chondrules (average diameter of 940 µm (N=24), fragments and refractory inclusions (CAIs up to 3 mm) all set within an opaque dark brown matrix. Matrix contains FeO-rich olivine, andradite, magnetite framboids and one prominent type B dark inclusion. Type I olivine chondrules are dominant (some of which contain isotropic glass). Sample has ~50% matrix. Geochemistry: (A.Love-App) Type I chondrules Fa3.2±2.5 (Fa0.4-8.2), Fe/Mn=37.7±27.3 n=17; Type II chondrules Fa11.14, n=1 low-Ca pyroxene Fs1.1±0.3Wo1.8±1.8 (Fs0.7-1.5Wo0.7-5.0), n=4; high Ca pyroxene Fs1.4Wo26.9, n=1. Classification: Carbonaceous Chondrite (CV3, S2, high weathering) Specimens: Blaine Reed holds the main mass. Two sliced fragments weighing 42.38 g and one polished thin section are on deposit at App. | ||||||||||||||||||||||||||||||||||
Data from: MB107 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) Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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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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