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Birkat Aghurmi 001
Basic information Name: Birkat Aghurmi 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2012
Country: Egypt
Mass:help 1666 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  L6
Recommended:  L6    [explanation]

This is 1 of 11338 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 3 Nov 2017
Writeuphelp
Writeup from MB 106:

Birkat Aghurmi 001        29°13’N, 25°31’E

Marsa Matruh, Egypt

Find: 2 Jan 2012

Classification: Ordinary chondrite (L6)

History: Found by Faisal Mohammed Ghadeer in January 2012 near the Siwa oasis one day after he had seen a fireball. He brought the stone back home to Nuweiba/Sinai where it was later acquired by Rolf Müller. Based on the weathering and wind-ablation, this cannot be a fresh fall.

Physical characteristics: Rounded individual, approx. 12 × 12 × 3.5 cm, strongly wind-ablated, fusion crust only partially preserved.

Petrography: (B. Hofmann, NMBE): Homogeneous chondritic texture with weakly delineated chondrules. Typical size of plagioclase grains is 40-60 μm. Metallic iron is partly weathered (~50%), troilite is only locally altered.

Geochemistry: (N. Greber, Bern and B. Hofmann, NMBE) Olivine compositions are Fa23.6±0.4 (N=32), pyroxene compositions (n=19) are Fs20.0±0.3Wo1.5±0.4.

Classification: Ordinary chondrite (L6), shock stage S2, low weathering (W2). Possibly paired with Siwa.

Specimens: 24.0 g plus one polished thin section at NMBE, main mass: Rolf Müller, Zurich, Switzerland.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Marsa Matruh
Origin or pseudonym:sand dune
Place of purchase:Siwa, Egypt
Date:2 Jan 2012
Latitude:29°13'N
Longitude:25°31'E
Mass (g):1666
Pieces:1
Class:L6
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.6±0.4 (N=32)
Ferrosilite (mol%):20.0±0.3 (N=19)
Wollastonite (mol%):1.5±0.4 (N=19)
Classifier:N. Greber, Bern and B. Hofmann, NMBE
Type spec mass (g):24.0
Type spec location:NMBE
Main mass:R. Müller, Schlieren, Switzerland
Finder:Faisal Mohammed Ghadeer
Comments:Submitted by Beda Hofmann
Institutions
   and collections
NMBE: Natural History Museum Bern Bernastrasse 15 CH-3005 Bern Switzerland, Switzerland; Website (institutional address; updated 2 Mar 2012)
Bern: University of Bern, University of Bern, Hochschulstrasse 4, CH-3012 Bern, Switzerland (institutional address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

Egypt
Coordinates:
     Recommended::   (29° 13'N, 25° 31'E)

Statistics:
     This is 1 of 8 approved meteorites from Marsa Matruh, Egypt
     This is 1 of 80 approved meteorites from Egypt (plus 12 unapproved names) (plus 1 impact crater)
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