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Northwest Africa 8607
Basic information Name: Northwest Africa 8607
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8607
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 261 g
Meteoritical Bulletin:  MB 103  (2014)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 99 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 3 Nov 2014
Writeup from MB 103:

Northwest Africa 8607 (NWA 8607)

(Northwest Aftica)

Purchased: 2014

Classification: Lunar meteorite

History: Purchased by Adam Aaronson in Morocco, 2014.

Physical characteristics: Single stone, no fusion crust, irregular sandblasted exterior. A saw cut and polished surface reveal a breccia with multiple textural lithologies and prominent shock melt veining.

Petrography: (C. Agee, UNM) Microprobe examination of polished, saw-cut surface of deposit sample shows a breccia with multiple lithologies: Lithology A (olivine gabbro-norite), Lithology B (olivine gabbroic anorthosite), Lithology C (fragmental feldspathic breccia), Lithology D (shock melt). Fe-Ni metal, sulfide, chromite, ilmenite, and phosphate are ubiquitous accessory phases throughout this meteorite.

Geochemistry: (C. Agee and N. Muttik, UNM). Lithology A (olivine gabbro-norite): olivine Fa29.2±1.6, Fe/Mn=98±6, n=13; low-Ca pyroxene Fs25.6±1.5Wo3.8±0.6, Fe/Mn=57±6, n=15; pigeonite Fs25.0±5.1Wo12.3±7.7, Fe/Mn=59±8, n=8; augite Fs9.9±4.4Wo42.6±2.8, Fe/Mn=40±7, n=2; plagioclase An95.7±0.6Ab4.0±0.6Or0.3±0.1, n=8. Lithology B (olivine gabbroic anorthosite): olivine Fa25.9±1.5, Fe/Mn=97±11, n=29; pigeonite Fs19.5±2.0Wo8.4±2.7, Fe/Mn=50±4, n=33; augite Fs13.8±3.1Wo38.1±1.8, Fe/Mn=44±7, n=8; plagioclase An92.6±3.0Ab6.7±2.8Or0.7±0.2, n=12. Shock melt (20 μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.18±2.80, TiO2=0.58±0.35, Al2O3=24.44±4.70, Cr2O3=0.16±0.09, MgO=6.99±2.41, FeO=6.89±2.97, MnO=0.10±0.05, CaO=13.94±1.98, NiO=0.02±0.03, Na2O=0.54±0.35, K2O=0.15±0.07 (all wt%), Fe/Mn=84±29, Mg#=64.6±6.3, n=24.

Classification: Achondrite (lunar polymict breccia)

Specimens: A total of 21.4 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 2014
Mass (g):261
Shock stage:high
Weathering grade:moderate
Classifier:C. Agee, UNM
Type spec mass (g):21.4
Type spec location:UNM
Main mass:Aaronson
Comments:Field name M1760; 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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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