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Northwest Africa 13162
Basic information Name: Northwest Africa 13162
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13162
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 335 g
Classification
  history:
Recommended:  R3-6    [explanation]

This is 1 of 21 approved meteorites classified as R3-6.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 9 Feb 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13162 (NWA 13162)

(Northwest Africa)

Purchased: 2019

Classification: Rumuruti chondrite (R3-6)

History: The meteorite was purchased from a local meteorite dealer in Nouakchott, Mauritania.

Physical characteristics: Dark brownish rock partly covered with fusion crust.

Petrography: The meteorite displays a light brownish to orange interior and is composed of up to 1.5 cm sized angular type 6 clasts and type 3 matrix. Olivine and low-Ca pyroxene are compositionally unequilibrated in the matrix. Fe-rich olivine is the most dominant mineral phase in the clasts. Chondrules have an average diameter of about 400 μm. More minor phases include low-Ca pyroxene, Ca-pyroxene, sodic plagioclase, sulfides, and Ti-bearing chromite; no metal has been detected.

Geochemistry: type 3 lithology: olivine: Fa23.5±15.5 (Fa1.9-48.1, n =16); low-Ca pyroxene: Fs11.8±6.0Wo1.3±1.2 (Fs2.6-19.6Wo0.4-3.5, n = 11); type 6 lithology: olivine: Fa36.6±0.2 (FeO/MnO=71±5, n=11); Ca-pyroxene: Fs10.7±0.5Wo43.6±0.3, n=11

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Nouakchott, Mauritania
Date:P 2019
Mass (g):335
Pieces:1
Class:R3-6
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):23.5; 36.6
Ferrosilite (mol%):11.8; 10.7
Wollastonite (mol%):1.3; 43.6
Classifier:A. Greshake, MNB
Type spec mass (g):34.6
Type spec location:MNB
Main mass:R. Lenssen
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7377 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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