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Northwest Africa 4919
Basic information Name: Northwest Africa 4919
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4919
Observed fall: No
Year found: 2007
Country: (Northwest Africa)
Mass:help 7.1 g
Classification
  history:
Recommended:  EL-melt rock    [explanation]

This is 1 of 23 approved meteorites classified as EL-melt rock.   [show all]
Search for other: EL chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), Enstatite-rich meteorites, and Melted chondrites
Comments: Approved 26 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 4919 (NWA 4919)

(Northwest Africa)

Purchased: 2007

Classification: Enstatite chondrite (EL melt rock)

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

Physical characteristics: Dark brownish fragment without fusion crust.

Petrography: The meteorite shows a strongly recrystallized texture of 50-200 µm sized enstatite grains, minor albitic feldspar, and Si-rich melt regions. Opaque phases include Si-bearing kamacite, Cr-rich troilite, and schreibersite. No relict chondrules have been observed.

Geochemistry: low-Ca pyroxene: Fs0.5±0.2Wo1.4±0.3 (Fs0.2-0.7Wo0.7-1.6, n=10); feldspar: An15.8±0.6Ab80.3±0.7Or3.9±0.4 (An14.8-16.6Ab79.3-81.1Or3.3-4.3, n=12); kamacite: Ni = 2.12±0.14 wt.%, Si = 1.27±0.05 wt.%, N = 3)

Classification: EL-melt rock. Possibly paired with Al Haggounia 001.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2007
Mass (g):7.1
Pieces:1
Class:EL-melt rock
Shock stage:S1
Weathering grade:high
Ferrosilite (mol%):0.5
Wollastonite (mol%):1.4
Classifier:A. Greshake, MNB
Type spec mass (g):1.8
Type spec location:MNB
Main mass:Hanno Strufe
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. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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