| MetSoc Home Publications Contacts |
|
||
|
||
| 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:  400 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 41 approved meteorites classified as R5. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 4-7) | ||||||||||||||||||||||||||||
| Comments: | Approved 19 Jun 2013 | ||||||||||||||||||||||||||||
| Writeup |
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: |
|
||||||||||||||||||||||||||||
| Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) |
||||||||||||||||||||||||||||
| Catalogs: |
| ||||||||||||||||||||||||||||
| References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
| ||||||||||||||||||||||||||||
Geography:
|
Statistics: This is 1 of 3 approved meteorites from Errachidia, Morocco This is 1 of 2163 approved meteorites from Morocco (plus 32 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||