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Northwest Africa 10709
Basic information Name: Northwest Africa 10709
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10709
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass:help 182.5 g
Meteoritical Bulletin:  MB 105  (2016)  R3-6
Recommended:  R3-6    [explanation]

This is 1 of 30 approved meteorites classified as R3-6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 20 Jun 2016
Writeup from MB 105:

Northwest Africa 10709 (NWA 10709)

Western Sahara

Purchased: Jan 2016

Classification: Rumuruti chondrite (R3-6)

History: Purchased in January 2016; reportedly found in El-Hamada, December 2015.

Physical characteristics: Single stone with weathered fusion crust. A saw-cut surface shows a few scattered chondrules and some dark-colored clasts set in an orange-brown fine grained groundmass.

Petrography: (C. Agee, UNM) This meteorite contains at least two petrologic type domains, R6 and R3. R6 is primarily the olivine-rich domains with indistinct chondrules, the R3 is characterized by domains with distinct porphyritic chondrules containing mesostasis or glass.

Geochemistry: (C. Agee and M. Spilde, UNM) R6 olivine Fa39.2±0.3, Fe/Mn=84±5, NiO=0.21±0.08 wt%, n=17; R3 olivine Fa17.3±12.7, Fe/Mn=63±25, n=5; low-Ca pyroxene Fs10.9±6.0Wo0.6±0.7, Fe/Mn=24±19, n=6; high-Ca pyroxene Fs12.3±2.4Wo40.8±6.4, Fe/Mn=40±1, n=3; pigeonite Fs27.2Wo7.4, Fe/Mn=53, n=1; oligoclase Ab86.9±6.5An9.7±2.0Or4.1±1.4, n=3; labradorite Ab34.1An65.7Or0.2.

Classification: Rumuruti chondrite (R3-6)

Specimens: 20.81 g including a probe mount on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P Jan 2016
Mass (g):182.5
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):39.2±0.3, 17.3±12.7
Ferrosilite (mol%):10.9±6.0, 12.3±2.4
Wollastonite (mol%):0.6±0.7, 40.8±6.4
Classifier:C. Agee, UNM
Type spec mass (g):20.81
Type spec location:UNM
Main mass:Darryl Pitt
Comments:Field name MCVICH038; 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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Western Sahara

     This is 1 of 261 approved meteorites from Western Sahara (plus 20 unapproved names)

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