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Northwest Africa 10507
Basic information Name: Northwest Africa 10507
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10507
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 266 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  CO3.0
Recommended:  CO3.0    [explanation]

This is 1 of 20 approved meteorites classified as CO3.0.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 3 Feb 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10507 (NWA 10507)

(Northwest Africa)

Purchased: 2015 Oct

Classification: Carbonaceous chondrite (CO3.0)

History: Purchased by Aras Jonikas in October 2015 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Small, well-formed chondrules (apparent diameter 0.55±0.3 mm), mineral fragments and sparse, irregularly shaped CAI are set in a deep brown matrix (~50 vol.%).

Geochemistry: Olivine (Fa1.0-89.4, Cr2O3 in ferroan olivine 0.20-0.84 wt.%, mean 0.38±0.15 wt.%, N = 20), orthopyroxene (Fs1.3-4.7Wo1.1-3.4, N = 3), clinopyroxene (Fs1.6Wo47.7; Fs18.6Wo47.5, N = 2).

Classification: Carbonaceous chondrite (CO3.0). The mean and range of Cr2O3 contents of ferroan olivine occurring as rims and as matrix grains is essentially the same as for Colony, which was designated as a CO3.0 by Grossman and Brearley (2005).

Specimens: 22.5 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Bibliography:
  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 Oct
Mass (g):266.2
Pieces:1
Class:CO3.0
Shock stage:low
Weathering grade:low
Fayalite (mol%):1.0-89.4
Ferrosilite (mol%):1.3-4.7
Wollastonite (mol%):1.1-3.4
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):22.5
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ15-13; submitted by A. Irving
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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