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Northwest Africa 7893
Basic information Name: Northwest Africa 7893
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7893
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 400 g
Classification
  history:
Meteoritical Bulletin:  MB 102  (2013)  R5
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 19 Jun 2013
Writeuphelp
Writeup from MB 102:

Northwest Africa 7893 (NWA 7893)

Errachidia, Morocco

Found: 2012

Classification: Rumuruti chondrite (R5)

History: Fragments of the stone were bought on November 19, 2012 and on May 13, 2013 close to Boudnib, Morocco, where the meteorites was found.

Physical characteristics: Many fragments, apparently from a single stone, most of them with fresh fusion crust. The interior is gray. Cut surfaces reveal dark and light angular clasts up to one cm.

Petrography: (J. Gattacceca, CEREGE) A brecciated chondrite showing indistinct chondrules and chondrule framents in a recrystallized matrix. The dominant minerals are olivine, plagioclase, Ca-pyroxene, sulfides (pentlandite, pyrrhotite, troilite), chromite, orthopyroxene. Plagioclase mean size is 21±10 μm. The dark clasts visible on the cut surfaces were not present on the studied section and have not been studied.

Geochemistry: The meteorite is equilibrated. Olivine Fa37.4±0.2 (FeO/MnO=83, mean NiO 0.22 wt.%); Plagioclase Ab85.0±1.3Or4.7±1.7An10.3±2.6; Ca-pyroxene Fs10.5±0.3Wo46.3±0.4; Orthopyroxene Fs29.2±0.1Wo0.9±0.1 (FeO/MnO=54); chromite Cr#=0.86, mean TiO2 in chromite is 6.2 wt.%. Magnetic susceptibility log χ = 2.95.

Classification: Rumuruti chondrite (R5)

Specimens: 20 g and a polished section at CEREGE. 55 g with P. Thomas. More material may be with the finder in Morocco.

Data from:
  MB102
  Table 0
  Line 0:
State/Prov/County:Errachidia
Place of purchase:Boudnib
Date:2012
Mass (g):~400
Pieces:several
Class:R5
Weathering grade:W0
Fayalite (mol%):37.4±0.2
Magnetic suscept.:2.95
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):20
Type spec location:CEREGE
Main mass:P. Thomas
Comments:Submitted by J. 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. 102, MAPS 50, 1662, September 2015
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2 approved meteorites from Errachidia, Morocco
     This is 1 of 1390 approved meteorites from Morocco (plus 16 unapproved names) (plus 1 impact crater)

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