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Northwest Africa 10620
Basic information Name: Northwest Africa 10620
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10620
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 254 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  R4
Recommended:  R4    [explanation]

This is 1 of 58 approved meteorites classified as R4.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 30 Apr 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10620 (NWA 10620)

(Northwest Africa)

Purchased: 2016 Jan

Classification: Rumuruti chondrite (R4)

History: Purchased by Aras Jonikas in January 2016 from a Moroccan dealer.

Physical characteristics: A group of five identical stones with black fusion crusts and gray interiors (total weight 254.15 g).

Petrography: Very fresh specimen consisting of separated, well-formed chondrules (mostly with apparent diameter 0.2-1 mm, but one 2 mm; some with pentlandite-rich rims) in a finer matrix containing relatively abundant pentlandite. Other minerals are olivine, orthopyroxene, clinopyroxene, sodic plagioclase, Ti-bearing chromite and troilite.

Geochemistry: Olivine (Fa39.4-39.6, N = 3), orthopyroxene (Fs29.9-30.7Wo2.4-3.0, N = 3), clinopyroxene (Fs11.0-11.1Wo45.0-45.1, N = 2), plagioclase (An9.0-13.7Or4.1-3.4, N = 2).

Classification: R4 chondrite.

Specimens: 21.44 g including one polished thin section at PSF; remainder with Mr. A. Jonikas.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016 Jan
Mass (g):254.15
Pieces:5
Class:R4
Shock stage:S2
Weathering grade:low
Fayalite (mol%):39.4-39.6
Ferrosilite (mol%):29.9-30.7
Wollastonite (mol%):2.4-3.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.44
Type spec location:PSF
Main mass:A. Jonikas
Comments:AJ16-1; 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
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Wang Ziyao   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7027 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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