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Northwest Africa 13650
Basic information Name: Northwest Africa 13650
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13650
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 131 g
Classification
  history:
Recommended:  R3    [explanation]

This is 1 of 45 approved meteorites classified as R3.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3)
Comments: Approved 16 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13650 (NWA 13650)

(Northwest Africa)

Purchased: 2020 Oct

Classification: Rumuruti chondrite (R3)

History: The meteorite was purchased from a dealer in Tindouf, Algeria.

Physical characteristics: Brownish rock without fusion crust.

Petrography: The meteorite is a breccia with well defined, partly flattened chondrules (mean diameter about 350 μm) embedded into abundant matrix predominatly composed of ferroan olivine. Compositionally unequilibrated olivine and pyroxene occur in chondrules and as single mineral fragments in the matrix. Minor phases include Ca-pyroxene, sodic plagioclase, Ti-bearing chromite as well as sulfides and their terrestrial alteration products; no metal has been detected.

Geochemistry: olivine: Fa28.0±14.8 (Fa2.7-49.9, n=17); low-Ca pyroxene: Fs14.6±10.1Wo0.7±0.4 (Fs2.4-27.8Wo0.4-1.7, n=12); Ca-pyroxene: Fs12.9±0.9Wo43.2±1.0 (Fs12.0-14.8Wo41.1-44.2, n=6); feldspar: An12.1±1.0Ab84.5±1.2Or3.5±0.4 (An10.9-13.6Ab82.8-85.6Or3.6-4.0, n=4)

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2020 Oct
Mass (g):131
Pieces:2
Class:R3
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):28.0
Ferrosilite (mol%):14.6; 12.9
Wollastonite (mol%):0.7; 43.2
Classifier:A. Greshake, MNB
Type spec mass (g):22.5
Type spec location:MNB
Main mass:Salamu Hamad
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. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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