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Erg Atouila 004
Basic information Name: Erg Atouila 004
     This is an OFFICIAL meteorite name.
Abbreviation: EA 004
Observed fall: No
Year found: 2021
Country: Mali
Mass:help 38 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  H4
Recommended:  H4    [explanation]

This is 1 of 6493 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 12 Nov 2022
Writeuphelp
Writeup from MB 111:

Erg Atouila 004 (EA 004)        22.974°N, 4.931°W

Gao, Mali

Purchased: 2021 Nov

Classification: Ordinary chondrite (H4)

History: Found in Mali and purchased by Abdelaziz Akmach in November 2021 from a dealer in Gao, Mali.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Relatively small, well-formed equilibrated chondrules containing devitrified glass and plagioclase are set in a relatively coarse grained matrix conaining pervasively altered kamacite, pentlandite and chromite. Alteration products include Fe oxides or hydroxides and Fe phosphate.

Geochemistry: Olivine (Fa18.8±0.1, range Fa18.6-19.0, N = 8), low-Ca pyroxene (Fs16.3±0.3Wo1.3±0.1, range Fs15.9-16.7Wo1.1-1.3, N = 6).

Classification: Ordinary chondrite (H4).

Specimens: 29.8 g including one polished thin section at UWB; remainder with Mr. A. Akmach.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Gao
Place of purchase:Gao, Mali
Date:P 2021 Nov
Latitude:22.974°N
Longitude:4.931°W
Mass (g):38000
Pieces:many
Class:H4
Shock stage:S2
Weathering grade:W3
Fayalite (mol%):18.8±1.1
Ferrosilite (mol%):16.3±0.3
Wollastonite (mol%):1.3±0.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):29.8
Type spec location:UWB
Main mass:A. Akmach
Comments:Work name SCY-75; 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)
UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
BrownU: Joseph Boesenberg Brown University Dept of Earth, Environmental and Planetary Sciences (DEEPS) 324 Brook Street Providence, RI 02912 , United States (institutional address; updated 4 Jan 2024)
Catalogs:
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:

Mali
Coordinates:
     Recommended::   (22° 58' 26"N, 4° 55' 52"W)

Statistics:
     This is 1 of 32 approved meteorites from Gao, Mali (plus 1 unapproved name)
     This is 1 of 116 approved meteorites from Mali (plus 2 unapproved names)
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