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Northwest Africa 10207
Basic information Name: Northwest Africa 10207
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10207
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 337 g
Meteoritical Bulletin:  MB 104  (2015)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 89 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 18 Jul 2015
Writeup from MB 104:

Northwest Africa 10207 (NWA 10207)

(Northwest Aftica)

Purchased: 2015

Classification: Primitive achondrite (Lodranite)

History: Purchased by Adam Aaronson in Morocco, 2015.

Physical characteristics: Weathered brown exterior. A saw cut reveals a mosaic of polygonal crystals, most less than ~1 mm, a few up to 2 mm.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows pyroxene and olivine grains with apparent mean diameter 390±140 μm (n=46). Numerous grain boundary triple junctions throughout, abundant metal/oxide sulfide veinlets in grain boundaries and crosscutting silicate crystals. Apatite detected, plagioclase is absent.

Geochemistry: (C. Agee and N. Muttik, UNM) Olivine Fa15.5±0.1, Fe/Mn=30±1, n=6; low-Ca pyroxene Fs13.7±0.2Wo2.2±0.3, Fe/Mn=17±0, n=3; diopside Fs6.0±0.1Wo43.3±0.7, Fe/Mn=12±1, Cr2O3=1.19±0.07 (wt%), n=3.

Classification: Lodranite, not acapulcoite, based on absence of plagioclase, however mean grain size of ferromagnesian silicates is slightly smaller than most lodranites.

Specimens: 21.5 g including a probe mount on deposit at UNM; Aaronson holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):337
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):15.5±0.1
Ferrosilite (mol%):13.7±0.2, 6.0±0.1
Wollastonite (mol%):2.2±0.3, 43.3±0.7
Classifier:C. Agee, UNM
Type spec mass (g):21.5
Type spec location:UNM
Main mass:Aaronson
Comments:M1823; submitted by C. Agee
   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)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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     This is 1 of 8744 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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