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Northwest Africa 8391
Basic information Name: Northwest Africa 8391
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8391
Observed fall: No
Year found: 2014
Country: Western Sahara
Mass:help 286 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  H6
Recommended:  H6    [explanation]

This is 1 of 6313 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 14 May 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8391 (NWA 8391)

Western Sahara

Found: 2014

Classification: Ordinary chondrite (H6)

History: Found by a meteorite hunter on a January/February, 2014, expedition in an area just northwest of the Free Zone in Western Sahara, and subsequently purchased by Darryl Pitt.

Physical characteristics: Single stone with dark-brown, weathered, fusion-crusted exterior. Saw cut reveals abundant metal/sulfide grains set in a dark brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows equilibrated chondrules, vesicular fusion crust, plagioclase grain size up to 200 μm. Kamacite, troilite, chromite and apatite.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa19.3±0.4, Fe/Mn=39±2, n=7; low-Ca pyroxene Fs16.4±0.2Wo1.4±0.3, Fe/Mn=22±1, n=7.

Classification: Ordinary chondrite (H6).

Specimens: 25.2 g including a probe mount on deposit at UNM, Darryl Pitt holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Date:2014
Mass (g):286.1
Pieces:1
Class:H6
Fayalite (mol%):19.3±0.4
Ferrosilite (mol%):16.4±0.2
Wollastonite (mol%):1.4±0.3
Classifier:C. Agee, UNM
Type spec mass (g):25.2
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 0021; submitted by C. Agee, UNM
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
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Geography:

Western Sahara
Coordinates:Unknown.

Statistics:
     This is 1 of 240 approved meteorites from Western Sahara (plus 19 unapproved names)

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