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Northwest Africa 8775
Basic information Name: Northwest Africa 8775
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8775
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 194 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  LL6
Recommended:  LL6    [explanation]

This is 1 of 2817 approved meteorites (plus 1 unapproved name) classified as LL6.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 29 Jan 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8775 (NWA 8775)

Northwest Africa

Purchased: 2014 Oct

Classification: Ordinary chondrite (LL6)

History: Purchased by Stefan Ralew in October 2014 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Mostly recrystallized with poikiloblastic texture, but rare, relatively large (up to 3.5 mm) recrystallized chondrules are present. Minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, Ti-bearing Cr-rich chromite, troilite and taenite. Despite a careful search, no kamacite was found and is presumed to be absent.

Geochemistry: Olivine, Fa31.4-31.5, N = 3; orthopyroxene, Fs25.1-25.4Wo2.3-2.4, N = 3; clinopyroxene, Fs10.1-10.4Wo43.5-42.9, N = 2.

Classification: Ordinary chondrite (LL6). Like NWA 7988 this specimen is completely devoid of kamacite, but texturally these stones are different, so pairing between them is unlikely.

Specimens: 20.2 g including one polished thin section at UWB; main mass with Ralew.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2014 Oct
Mass (g):194
Pieces:1
Class:LL6
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):31.4-31.5
Ferrosilite (mol%):25.1-25.4
Wollastonite (mol%):2.3-2.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:UWB
Main mass:S. Ralew
Comments:RA10-4; 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)
Ralew: Stefan Ralew, Kunibertstra├če 29, 12524 Berlin, Germany; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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