header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 20 Jan 2020
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:
Include past classifications in search
Limit to approved meteorite names
Search text:  
Northwest Africa 8174
Basic information Name: Northwest Africa 8174
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8174
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 150 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 344 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Aug 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8174 (NWA 8174)

(Northwest Africa)

Purchased: 2013 Oct

Classification: HED achondrite (Eucrite, polymict)

History: Two very similar stones were purchased together by G. Fujihara (who provided portions of both as type material) in October 2013 from a dealer in Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fragmental breccia composed predominantly of gabbroic eucrite clasts in a sparse matrix of related debris (mostly pyroxene). Minerals are exsolved pigeonite (with variable red-brown staining), calcic plagioclase (polycrystalline, birefringent), silica polymorph, ilmenite, Ti-bearing chromite, troilite and minor secondary barite.

Geochemistry: Orthopyroxene host (Fs60.2-62.8Wo2.6-1.9, FeO/MnO =30-32), clinopyroxene exsolution lamellae (Fs28.2-28.3Wo42.3-42.6, FeO/MnO = 29-30).

Classification: Eucrite (polymict, gabbroic). Based on primary textures, shock features and style of weathering, this material is likely paired with NWA 7989, NWA 8036 and NWA 8056.

Specimens: A total of 20.1 g including one polished thin section at UWB. The remaining material is held by G. Fujihara.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013 Oct
Mass (g):150
Pieces:2
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:moderate
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.1
Type spec location:UWB
Main mass:G. Fujihara
Comments:GF13-13; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

Direct link to this page