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Northwest Africa 12246
Basic information Name: Northwest Africa 12246
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12246
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 101.4 g
Classification
  history:
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 83 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 11 Dec 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12246 (NWA 12246)

Morocco

Purchased: 2018 May

Classification: HED achondrite (Eucrite, unbrecciated)

History: Found near Bir Tighisit, southern Morocco and purchased by Darryl Pitt in May 2018 from a Mauritanian dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh gabbroic eucrite composed mostly of zoned low-Ca and high-Ca pyroxene (grainsize up to 1.5 mm) and anorthite (as interstitial stubby laths) with accessory silica polymorph, fayalite, ilmenite, chromite and troilite.

Geochemistry: Low-Ca pyroxene cores (Fs30.2-30.7Wo5.8-6.1, FeO/MnO = 26-27, N = 2), orthopyroxene rims (Fs57.2-62.8Wo3.9-2.1, FeO/MnO = 33-34, N = 2), subcalcic augite (Fs39.2Wo30.3; Fs45.7Wo23.4; FeO/MnO = 31, N = 2), fayalite (Fa80.5-82.6, FeO/MnO = 39-41), anorthite (An91.4-92.1Or0.6-0.8, N = 2).

Classification: Eucrite (unbrecciated, gabbroic).

Specimens: 21.1 g including one polished thin section at UWB; remainder with DPitt.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2018 May
Mass (g):101.4
Pieces:1
Class:Eucrite-unbr
Shock stage:low
Weathering grade:low
Fayalite (mol%):80.5-82.6
Ferrosilite (mol%):30.2-30.7; 57.2-62.8
Wollastonite (mol%):5.8-6.1; 3.9-2.1
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.1
Type spec location:UWB
Main mass:DPitt
Comments:Work name MVCH 367; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1326 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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