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Northwest Africa 10307
Basic information Name: Northwest Africa 10307
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10307
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 85.6 g
Meteoritical Bulletin:  MB 104  (2015)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 272 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 22 Oct 2015
Writeup from MB 104:

Northwest Africa 10307 (NWA 10307)

(Northwest Africa)

Purchased: 2015 May

Classification: HED achondrite (Eucrite, monomict)

History: Purchased by Fabien Kuntz in May 2015 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Fresh fragmental breccia containing some ophitic eucrite clasts (one large clast measures 1.7 cm × 1.5 cm), but mostly composed of related mineral fragments (predominantly calcic plagioclase and exsolved pigeonite). Accessory minerals include silica polymorph, Ti-chromite, ilmenite, troilite and zircon.

Geochemistry: Low-Ca pyroxene host (Fs55.3Wo6.6, FeO/MnO = 32, N = 1), augite exsolution lamella (Fs29.3Wo39.6, FeO/MnO = 32, N = 1), augite host (Fs29.2Wo40.0, FeO/MnO = 29, N = 1), low-Ca pyroxene exsolution lamella (Fs57.3Wo6.2, FeO/MnO = 29, N = 1), pigeonite (Fs55.9Wo7.4, FeO/MnO = 31, N = 1), augite (Fs33.6Wo37.6, FeO/MnO = 38, N = 1).

Classification: Eucrite (monomict breccia).

Specimens: 17.17 g including one polished thin section at PSF; remainder with Kuntz.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2015 May
Mass (g):85.6
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):55.3-57.3; 29.2-29.3
Wollastonite (mol%):6.6-6.2; 40.0-39.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):17.17
Type spec location:PSF
Main mass:Kuntz
Comments:K260; submitted by A. Irving
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
Kuntz: Fabien Kuntz, France; Website (private address)
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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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Predrag Radovic   

     This is 1 of 9111 approved meteorites from (Northwest Africa) (plus 1873 unapproved names)

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