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Northwest Africa 10714
Basic information Name: Northwest Africa 10714
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10714
Observed fall: No
Year found: 2015
Country: Mauritania
Mass:help 178.2 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  CO3
Recommended:  CO3    [explanation]

This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 20 Jun 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10714 (NWA 10714)

Mauritania

Purchased: 2015 Dec 1

Classification: Carbonaceous chondrite (CO3)

History: Purchased 1 Dec 2015 in Mauritania. Recovered from near the border region of Western Sahara, Mauritania and Algeria.

Physical characteristics: Single stone. Weathered dark brown exterior; saw cut reveals many small chondrules in a dark brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous chondrules, some fragmental or irregular, most in the size range 50-200 μm, a few up to 400 μm. Scattered metal/sulfide blebs, fine-grained matrix makes up about 35% of this meteorite.

Geochemistry: (C. Agee and M. Spilde, UNM) All chondrule olivine Fa19.8±20.0, Fe/Mn=62±43, Cr2O3=0.24±0.12, n=16; Type I chondrule olivine Fa1.1±0.5, Cr2O3=0.21±0.06, n=6; ferroan chondrule olivine Fa31.0±17.1, Fe/Mn=81±43, Cr2O3=0.26±0.15, n=10; Type I chondrule low-Ca pyroxene Fs1.3±0.5Wo1.2±0.8, n=7; Type II chondrule low-Ca pyroxene Fs31.0Wo2.9, Fe/Mn=43, n=1; aluminous diopside Fs1.1±0.5Wo40.4±7.7, n=5.

Classification: Carbonaceous chondrite (CO3), likely type 3.1 based on mean value and sigma of Cr2O3 in ferroan olivine (Grossman and Brearley, 2005), however there were too few Type II chondrules present (n=10) in the probe section to obtain good statistics.

Specimens: 21 g including a probe mount on deposit at UNM, DPitt 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:
  MB105
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2015 Dec 1
Mass (g):178.2
Pieces:1
Class:CO3
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):19.8±20.0
Ferrosilite (mol%):1.3±0.5, 1.1±0.5
Wollastonite (mol%):1.2±0.8, 40.4±7.7
Classifier:C. Agee, UNM
Type spec mass (g):21
Type spec location:UNM
Main mass:DPitt
Comments:Field name MCVICH015; 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. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
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Geography:

Mauritania
Coordinates:Unknown.

Statistics:
     This is 1 of 221 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)
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Revision
  history:
  This lists important revisions made to data for this record.

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