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Northwest Africa 15029
Basic information Name: Northwest Africa 15029
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15029
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1959 g
Recommended:  Eucrite-br    [explanation]

This is 1 of 209 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Jul 2022
Writeup from MB 111:

Northwest Africa 15029 (NWA 15029)

(Northwest Africa)

Purchased: 2021 Aug

Classification: HED achondrite (Eucrite, brecciated)

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

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed lithic clasts of fine-intergranular, diabasic and gabbroic eucrites plus related crystalline debris within a fine grained matrix. No diogenite components were observed. Minerals are exsolved pigeonite, calcic plagioclase, unexsolved pigeonite, zoned pigeonite, augite, fayalite, silica polymorph, Fe metal, ilmenite, chromite and troilite. Some symplectitic intergrowths of augite+fayalite+silica polymorph and a very fine grained recrystallized eucrite breccia clast are also present.

Geochemistry: Orthopyroxene (Fs62.6Wo1.6, FeO/MnO = 32), pigeonite (Fs37.1-43.0Wo7.8-8.2; Fs44.7-48.8Wo11.5-17.1; FeO/MnO = 29-32; N = 4), ferropigeonite (Fs69.8-70.7Wo9.2-8.1, FeO/MnO = 17-18, N = 2), subcalcic augite (Fs42.5-43.9Wo20.8-26.0, FeO/MnO = 28-30, N = 3), ferroan subcalcic augite (Fs68.2Wo21.5; Fs57.4Wo26.5; Fs54.1Wo34.4; FeO/MnO = 32-34; N = 3), augite (Fs48.7Wo37.7, FeO/MnO = 34), fayalite (Fa87.0-88.3, FeO/MnO = 41, N = 3), plagioclase (An86.8-92.0Or0.4-0.2, N = 5).

Classification: Eucrite (breccia).

Specimens: 32.1 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):1959
Shock stage:low
Weathering grade:low
Fayalite (mol%):87.0-88.3
Ferrosilite (mol%):62.6; 69.8-70.7; 37.1-43.0; 44.7-48.8; 42.5-43.9;
Wollastonite (mol%):1.6; 9.2-8.1; 7.8-8.5; 11.5-17.1; 20.8-26.0; 37.7-
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):32.1
Type spec location:PSF
Main mass:J. Whitcomb
Comments:Work name JW-96; 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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