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Northwest Africa 8027
Basic information Name: Northwest Africa 8027
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8027
Observed fall: No
Year found: 2003
Country: (Northwest Africa)
Mass:help 4.58 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 372 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Comments: Approved 3 Jul 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8027 (NWA 8027)

(Northwest Africa)

Purchased: 2003

Classification: HED achondrite (Howardite)

Petrography: The sample is highly brecciated and consists of a diverse range of angular to sub-rounded gabbroic and diogenitic clasts set in a clastic, relatively coarse-grained matrix. Clast sizes vary from ~100 μm to ~2000 μm in the thin section studied and display a wide range of textures, including equigranular, spherulitic and micro-crystalline types. The matrix consists of angular grains up to ~100 μm diameter. The matrix is dominated by angular grains of plagioclase, orthopyroxene, pigeonite and subcalcic augite. Plagioclase in the sample is in the range An79-93. Pyroxene in the sample is in the range Wo1.1En78.5Fs20.4 to Wo24.1En34.8Fs41.1 The sample contains greater than 10% magnesian orthopyroxene and is therefore a howardite based on the classification scheme of Delaney et al. (1983).

Geochemistry: The oxygen isotope composition of the sample is consistent with it being a member of the HED suite: δ17O = 1.68‰ δ18O = 3.68‰ Δ17O = -0.23‰

Bibliography:
  • Delaney J.S., Takeda H., Prinz M., Nehru C.E., and Harlow G.E. (1983) The nomenclature of polymict basaltic achondrites. Meteoritics 18 103-111. (link)
Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Western Sahara
Date:P 2003
Mass (g):4.58
Pieces:1
Class:Howardite
Classifier:R. Greenwood, OU
Type spec mass (g):1.26
Type spec location:OU
Main mass:Michel Franco
Comments:Submitted by Richard Greenwood
Plots: O isotopes:  
Institutions
   and collections
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6846 approved meteorites from (Northwest Africa) (plus 2038 unapproved names)

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