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Northwest Africa 12731
Basic information Name: Northwest Africa 12731
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12731
Observed fall: No
Year found: 2018
Country: Algeria
Mass:help 29 g
Classification
  history:
Recommended:  R5    [explanation]

This is 1 of 34 approved meteorites classified as R5.   [show all]
Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7)
Comments: Approved 8 Jul 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12731 (NWA 12731)

Algeria

Purchased: 2018 Oct

Classification: Rumuruti chondrite (R5)

History: Bought from Mohamed Elguirah in October 2018

Physical characteristics: Full stone covered by dull and fractured fusion crust

Petrography: (J. Gattacceca, CEREGE) Chondrite with recrystallized texture and average plagioclase size below 50 µm. Olivine is the ultra dominant silicate. Abundant sulfides to 200 µm, including pentlandite and pyrrhotite.

Geochemistry: Olivine Fa39.9±0.5, NiO=0.25±0.05 wt% (n=4). Plagioclase An7.5Ab86.5Or6.0 (n=2). Ca-pyroxene Fs 11.8Wo44.4 (n=1).

Classification: Rumuruti chondrite (R5).

Specimens: Type specimen at CEREGE. Main mass with Jean Redelsperger.

Data from:
  MB108
  Table 0
  Line 0:
Date:P 2018 Oct
Mass (g):29
Pieces:1
Class:R5
Weathering grade:minimal
Fayalite (mol%):39.9±0.5 (n=4)
Magnetic suscept.:2.94
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):7.8
Type spec location:CEREGE
Main mass:Jean Redelsperger
Comments:work name JR069; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108, in preparation (2019)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 974 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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