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Northwest Africa 14972
Basic information Name: Northwest Africa 14972
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14972
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 743 g
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 263 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 18 May 2022
Writeup from MB 111:

Northwest Africa 14972 (NWA 14972)

(Northwest Africa)

Purchased: 2021 Aug

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Jason Whitcomb in August 2021 from an Algerian dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed of mafic igneous clasts with intergranular texture plus related crystalline debris in a sparse fine grained matrix. Minerals are predominantly exsolved pigeonite and calcic plagioclase with accessory subcalcic augite, silica polymorph, chromite, troilite, ilmenite and Fe metal. Some thin dark shock melt veinlets are present. - basaltic texture

Geochemistry: Low-Ca pyroxene hosts (Fs61.1-64.1Wo2.8-5.9, FeO/MnO = 30-32, N = 7), augite exsolutioin lamellae (Fs29.6-31.7Wo41.9-40.3, FeO/MnO = 29-30, N = 3), subcalcic augite (Fs46.5Wo23.8; Fs37.1Wo33.8; FeO/MnO = 30; N = 2), plagioclase (An88.3-91.5Or0.5-0.3, N = 4).

Classification: Eucrite (monomict breccia).

Specimens: 20.4 g including one polished thin section at PSF; remainder with Mr. J. Whitcomb.

Data from:
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021 Aug
Mass (g):743
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):61.1-64.1; 29.6-31.7
Wollastonite (mol%):2.6-5.9; 41.9-40.3
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):20.4
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-77; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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