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Northwest Africa 15057
Basic information Name: Northwest Africa 15057
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15057
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 6.4 kg
Classification
  history:
Recommended:  CVox3    [explanation]

This is 1 of 25 approved meteorites classified as CVox3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 20 Jun 2022
Writeuphelp
Writeup from MB 111:

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.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Dec
Mass (g):6400
Pieces:many
Class:CVox3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):23.0±36.0
Ferrosilite (mol%):1.4±0.6
Wollastonite (mol%):0.8±0.3
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):21.4
Type spec location:UWB
Main mass:C. Zlimen
Comments:Work name ZLI 068; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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