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Northwest Africa 8725
Basic information Name: Northwest Africa 8725
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8725
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 694 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  CR2
Recommended:  CR2    [explanation]

This is 1 of 163 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 29 Jan 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8725 (NWA 8725)

(Northwest Africa)

Found: 2014

Classification: Carbonaceous chondrite (CR2)

History: Recovered in April 2014 near the borders of Mauritania, Western Sahara and Algeria. Purchased in Mauritania in June 2014.

Physical characteristics: Single stone. Shiny black, irregular weathered exterior with some CAIs visible. A saw cut reveals many distinct chondrules (850±500 μm, n=17) and scattered small CAIs set in a brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, many mantled by, or including, Fe-Ni metal blebs or grains which make up ~10% of this meteorite; AOA’s present, ~40% fine-grained matrix with phyllosilicates, FeNi-sulfide and troilite detected.

Geochemistry: (C. Agee and N. Muttik, UNM) Ferroan chondrule olivine Fa9.4±15.4, n=27, Fe/Mn=51±29, Cr2O3=0.19±0.09, n=23; Forsteritic chondrule olivine Fa0.9±0.5, Cr2O3=0.28±0.19, n=4; enstatite Fs2.0±0.7Wo2.0±3.2, n=16; aluminous diopside Fs1.6±0.5Wo35.5±6.9, n=8.

Classification: Carbonaceous chondrite (CR2). Moderately weathered, low shock stage.

Specimens: 21 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:2014
Mass (g):693.6
Pieces:1
Class:CR2
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):9.4±15.4
Ferrosilite (mol%):2.0±0.7
Wollastonite (mol%):2.0±3.2
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MAC 64; 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. 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 6877 approved meteorites from (Northwest Africa) (plus 2037 unapproved names)

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