Northwest Africa 15057

Name: Northwest Africa 15057
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15057
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass 6.4 kg

Meteoritical Bulletin:   (2023)  CVox3
Recommended:  CVox3   

This is 1 of 58 approved meteorites classified as CVox3.  

Approved 20 Jun 2022

Northwest Africa 15057 (NWA 15057)

(Northwest Africa)

Purchased: 2021 Dec

Classification: Carbonaceous chondrite (CVox3)

History: Purchased by Craig Zlimen in December 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Well-formed, unequilibrated chondrules (some with concentric rims, apparent diameter 1050±400 µm, N = 26) containing both fresh and devitrified glass together with relatively abundant CAI are set in a fine grained matrix (~40 vol.%, sepia brown to opaque in thin section) containing Cr-bearing magnetite, pentlandite, plagioclase and kamacite. Minerals in CAI include anorthite, spinel and gehlenite.

Geochemistry: Olivine (Fa23.0±36.0, range Fa1.3-93.9, N = 6), low-Ca pyroxene (Fs1.4±0.6Wo0.8±0.3, range Fs0.7-2.1Wo0.3-1.1, N = 5), subcalcic diopside (Fs1.1Wo31.4), diopside (Fs0.7±0.0Wo45.7±0.6, range Fs0.7±0.0Wo45.3-46.1, N = 2), magnetite (Cr2O3 0.1-1.0 wt.%, N = 6).

Classification: Carbonaceous chondrite (CVox3).

Specimens: 21.4 g including one polished thin section at UWB; remainder with Mr. C. Zlimen.


Place of purchase:Algeria
Date:P 2021 Dec
Mass (g):6400
Pieces:many
Class:CVox3
Shock stage:S2
Weathering grade:low

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