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Northwest Africa 8399
Basic information Name: Northwest Africa 8399
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8399
Observed fall: No
Year found: 2014
Country: Western Sahara
Mass:help 18.5 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 516 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 29 May 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8399 (NWA 8399)

Western Sahara

Found: 2014

Classification: Ureilite

History: Found by a meteorite hunter on a 2014 Jan-Feb expedition in Western Sahara, and subsequently purchased by Darryl Pitt.

Physical characteristics: Single stone with dark weathered fusion crust. Saw cut reveals polycrystalline texture of light and dark grains.

Petrography: (C. Agee, UNM) Examination of a polished mount shows approximately 75% olivine, 20% pyroxene, texturally equilibrated with triple junctions, ubiquitous Fe-Ni metal and troilite blebs, olivines zoned with forsteritic rims. Diamonds occur throughout, often forming elongate domains up to 1000 μm.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine cores Fa23.6±1.7, Fe/Mn=43±5, Cr2O3=0.48±0.05, n=6; olivine rims Fa6.9±2.9, Fe/Mn=10±2, Cr2O3=0.69±0.02 wt%, n=2; low-Ca pyroxene Fs18.4±2.2Wo2.9±1.3, Fe/Mn=29±4, Cr2O3=1.39±0.29 wt%, n=8; chromium sulfide detected.

Classification: Achondrite (ureilite).

Specimens: 3.9 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  MB103
  Table 0
  Line 0:
Date:2014
Mass (g):18.5
Pieces:1
Class:Ureilite
Classifier:C. Agee, UNM
Type spec mass (g):3.9
Type spec location:UNM
Main mass:D. Pitt
Comments:Field name MAC 0029; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
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 210 approved meteorites from Western Sahara (plus 20 unapproved names)

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