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El Mrira 001
Basic information Name: El Mrira 001
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 6.6 kg
Classification
  history:
Recommended:  H4-melt breccia    [explanation]

This is 1 of 8 approved meteorites (plus 1 unapproved name) classified as H4-melt breccia.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Melted chondrites, Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 25 Apr 2021
Writeuphelp
Writeup from MB 110:

El Mrira 001        28.467°N, 8.920°W

Morocco

Find: 2019 Jan

Classification: Ordinary chondrite (H4, melt breccia)

History: The specimens (total weight 6600 g) were found together in January 2019 in southern Morocco at 28.467°N, 8.920°W and purchased by Jesper Grønne in 2019 from a dealer in Agadir, Morocco.

Physical characteristics: A notable feature of these specimens is the presence of abundant spherical to ellipsoidal vesicles and larger vugs (up to 14 mm across) in the fine grained melt-textured matrix.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Very fresh specimen consisting of equilibrated Type 4 chondrite clasts in a very fine grained matrix with prominent vesicles (some ellipsoidal and preferentially aligned). Lithic clasts are shock-darkened and consist of well-formed chondrules in a relatively coarse grained, recrystallized matrix containing relatively abundant kamacite plus taenite, troilite, merrillite, chlorapatite and chromite. Clasts have shock stage S4. The vesicular matrix contains distributed small silicate mineral clasts set in a partly glassy, melt-textured groundmass with dispersed composite metal+troilite spherules (up to 1.5 mm in size).

Geochemistry: Olivine (Fa18.5±0.3, range Fa17.9-18.9, N = 6), low-Ca pyroxene (Fs16.5±0.5Wo1.2±0.2, range Fs16.2-17.3Wo1.0-1.4, N = 5), subcalcic augite (Fs9.1Wo36.3), augite (Fs6.0±0.6Wo46.1±0.3, range Fs5.5-6.4Wo46.3-45.9, N = 2), plagioclase (Ab64.2An34.7Or1.1).

Classification: Ordinary chondrite (H4-melt breccia).

Specimens: 20.1 g including one polished thin section at UWB; remainder with Mr. J. Grønne.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Agadir
Date:2019 Jan
Latitude:28.467°N
Longitude:8.920°W
Mass (g):6600
Pieces:several
Class:H4-melt breccia
Weathering grade:W1/2
Fayalite (mol%):18.5±0.3
Ferrosilite (mol%):16.5±0.5
Wollastonite (mol%):1.2±0.2
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):20.1
Type spec location:UWB
Main mass:J. Grønne
Comments:Work name JG 025; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Geography:

Morocco
Coordinates:
     Recommended::   (28° 28' 1"N, 8° 55' 12"W)

Statistics:
     This is 1 of 1676 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)
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