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Northwest Africa 8170
Basic information Name: Northwest Africa 8170
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8170
Observed fall: No
Year found: 2013
Country: Morocco
Mass:help 89.2 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 425 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 24 Jan 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8170 (NWA 8170)

Morocco

Purchased: 2013

Classification: HED achondrite (Eucrite, polymict)

History: Purchased from a dealer in Morocco in 2013 by Steve Witt and Smara Addi.

Physical characteristics: Single stone, dark weathered exterior, saw-cut reveals a breccia of light and dark gray clasts.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a highly brecciated texture with a mix of equilibrated and unequilibrated eucrite clasts. Many pyroxenes with exsolution lamellae, but also numerous pyroxenes with igneous zoning. Some domains with fine-grained cataclastic texture, many fragmental pyroxene and plagioclase grains. Ubiquitous chromite.

Geochemistry: (C. Agee and H. Miley, UNM) Augite Fs31.8±10.1Wo32.7±8.4, Fe/Mn=30±2, n=8; pigeonite Fs44.1±7.4Wo9.3±3.8, Fe/Mn=32±1, n=19; low-Ca pyroxene Fs41.0±8.3Wo3.6±1.9, Fe/Mn=31±2, n=27; plagioclase An90.0±2.0Ab9.4±2.0Or0.7±0.1, n=7.

Classification: Polymict Eucrite with at least three different eucrite lithologies: 1) unequilibrated eucrite with zoned pyroxenes, 2) cumulate eucrite, 3) basaltic eucrite.

Specimens: 18.3 g including a probe mount on deposit at UNM, Steve Witt holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):89.2
Pieces:1
Class:Eucrite-pmict
Classifier:C. Agee, UNM
Type spec mass (g):18.2
Type spec location:UNM
Main mass:Steve Witt
Comments:Submitted by C. Agee
Institutions
   and collections		 UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
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:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Steve Witt   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater)

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