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Northwest Africa 8737
Basic information Name: Northwest Africa 8737
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8737
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 670 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  CO3.0
Recommended:  CO3.0    [explanation]

This is 1 of 21 approved meteorites classified as CO3.0.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 5 Feb 2015
Writeuphelp
Writeup from MB 104:

Northwest Africa 8737 (NWA 8737)

(Northwest Africa)

Purchased: 2014

Classification: Carbonaceous chondrite (CO3.0)

History: Purchased by Aziz Habibi in Morocco, January 2014.

Physical characteristics: Many identical appearing pieces with dark-brown exterior. A saw cut reveals very small chondrules and scattered small CAIs set in a dark brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous chondrules 5-250 μm (155±93 μm, n=64), fine-grained matrix makes up about 25% of this meteorite.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine range Fa0.6-56.6, n=28. Type I chondrule olivine Fa1.0±0.3, n=14; ferroan chondrule olivine Fa31.3±16.0, Fe/Mn=83±31, Cr2O3=0.29±0.11 wt%, n=14; enstatite Fs2.2±1.7Wo1.7±1.3, n=26; aluminous diopside and Cl-apatite found.

Classification: Carbonaceous chondrite (CO3.0) based on mean Cr2O3=0.29±0.11 wt% in ferroan olivines, values plotting close to Colony (CO3.0) as reported by Grossman and Brearley (2005).

Specimens: 20.1 g including a probe mount on deposit at UNM, Aziz Habibi holds the main mass.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB104
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2014
Mass (g):670
Pieces:Many
Class:CO3.0
Shock stage:low
Weathering grade:medium
Fayalite (mol%):1.0±0.3, 31.3±16.0
Ferrosilite (mol%):2.2±1.7
Wollastonite (mol%):1.7±1.3
Classifier:C. Agee, UNM
Type spec mass (g):20.1
Type spec location:UNM
Main mass:Aziz Habibi
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. 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 7035 approved meteorites from (Northwest Africa) (plus 2000 unapproved names)

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