header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 18 Nov 2023
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 12763
Basic information Name: Northwest Africa 12763
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12763
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 837 g
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 275 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Aug 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12763 (NWA 12763)

(Northwest Africa)

Purchased: 2016 Dec

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Beat Booz in December 2016 from a Moroccan dealer.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed of microgabbroic eucrite clasts plus mineral clasts of related crystalline debris, both exhibiting some preferred dimensional orientation. Minerals are exsolved pigeonite (pale orange in thin section), calcic plagioclase (polycrystalline) together with accessory ilmenite, Ti-chromite, troilite and zircon. Minor secondary calcite is present.

Geochemistry: Low-Ca pyroxene (Fs59.7-63.4Wo3.8-5.6, FeO/MnO = 28-33, N = 3), high-Ca pyroxene (Fs25.1-27.8Wo43.0-42.5, FeO/MnO = 30-34, N = 3), plagioclase (An92.1Or0.2).

Classification: Eucrite (monomict breccia, microgabbroic, shocked)

Specimens: 21.9 g including one polished thin section at UWB; remainder with Mr. B. Booz.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016 Dec
Mass (g):837.2
Pieces:4
Class:Eucrite-mmict
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):59.7-63.4; 25.1-27.8
Wollastonite (mol%):3.8-5.6; 43.0-42.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):21.9
Type spec location:UWB
Main mass:B. Booz
Comments:Work name BB-55; 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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Beat Booz               
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

Direct link to this page