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Northwest Africa 15794
Basic information Name: Northwest Africa 15794
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15794
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 2.06 kg
Classification
  history:
Meteoritical Bulletin:  MB 112  (2024)  EL6
Recommended:  EL6    [explanation]

This is 1 of 136 approved meteorites classified as EL6.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 29 May 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15794 (NWA 15794)

(Northwest Africa)

Purchased: 2023

Classification: EL6a

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Two rocks almost completely covered with fresh fusion crust.

Petrography: The meteorite shows a fine-grained recystallized texture dominated by 100 to 300 µm sized enstatite and sodic feldspar grains. Opaque phases are Si-bearing kamacite, schreibersite, troilite, alabandite, daubréelite, and Cr-bearing troilite. One poorly defined relict chondrule detected.

Geochemistry: enstatite: Fs0.3±0.2Wo1.7±0.1 (Fs0.1-0.7Wo1.6-1.8, n=10); feldspar: An14.9±1.2Ab80.8±0.6Or4.3±0.7 (An12.5-16.7Ab79.6-81.9Or2.9-5.8, n=10); kamacite: Ni=6.3±0.1, Si=0.96±0.03, Co=0.31±0.02, n=7; troilite: Cr=0.96±0.29, Ti=0.65±0.07, n=5; (Mn,Mg,Fe)S: Fe=15.1±0.8, n=5 (all wt%)

Classification: Enstatite chondrite (EL6a). EL based on silica content in kamacite. ELa subgroup based on Cr and Ti contents of troilite, Fe content in alabandite and Ni content in kamacite, Weyrauch et al. (2017).

Bibliography:
  • Weyrauch M., Horstmann M., and Bischoff A. (2017) Chemical variations of sulfides and metal in enstatite chondrites—Introduction of a new classification scheme. 53, 394-415. (link)
Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2023
Mass (g):2060
Pieces:2
Class:EL6a
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):0.3
Wollastonite (mol%):1.7
Classifier:A. Greshake, MNB
Type spec mass (g):23.8
Type spec location:MNB
Main mass:Polandmet - Marcin Cimala
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Polandmet: targoniny 30 43445 Dziegielow Poland, Poland; Website (institutional address; updated 7 May 2021)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Cartier C., Consolmagno G., Goodrich C., Greshake A., Gross J., Joy K. H., Miao B. and Zhang B. (2024) The Meteoritical Bulletin, no. 112. Meteoritics & Planetary Science 59, 1820–1823. ?
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9921 approved meteorites from (Northwest Africa) (plus 1838 unapproved names)

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