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Northwest Africa 10715
Basic information Name: Northwest Africa 10715
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10715
Observed fall: No
Year found: 2015
Country: Mauritania
Mass:help 73.1 g
Meteoritical Bulletin:  MB 105  (2016)  R3
Recommended:  R3    [explanation]

This is 1 of 72 approved meteorites classified as R3.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 16 Oct 2016
Writeup from MB 105:

Northwest Africa 10715 (NWA 10715)


Purchased: 2015 Dec 1

Classification: Rumuruti chondrite (R3)

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 chondrules of variable size, some up to 1 mm, set in a dark brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows abundant matrix olivines and numerous porphyritic and BO chondrules, most with mesostasis or glass, are present. Chondrules are 300-1000 μm with an average close to the 400 μm average for R. Finally there were no CAIs observed in this sample and no magnetite. Ni-sulfide observed.

Geochemistry: (C. Agee and M. Spilde, UNM) Olivine Fa30.0±14.9, Fe/Mn=112±92, Cr2O3=0.08±0.11 wt%, NiO=0.21±0.23, n=22; low-Ca pyroxene Fs8.3±7.2Wo3.2±2.7, Fe/Mn=43, n=5; augite Fs11.1±0.9Wo42.2±5.3, n=2.

Classification: Rumuruti chondrite (R3). R based on Fe/Mn, presence of nickel bearing olivine, absence of magnetite and CAIs, and nickel-bearing sulfide.

Specimens: 15.4 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2015 Dec 1
Mass (g):73.1
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):30.0±14.9
Ferrosilite (mol%):8.3±7.2, 11.1±0.9
Wollastonite (mol%):3.2±2.7, 42.2±5.3
Classifier:C. Agee, UNM
Type spec mass (g):15.4
Type spec location:UNM
Main mass:DPitt
Comments:Field name MCVICH016; submitted by C. Agee, UNM
   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)
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 212 approved meteorites from Mauritania (plus 2 unapproved names) (plus 2 impact craters)

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