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Erg Chech 009
Basic information Name: Erg Chech 009
     This is an OFFICIAL meteorite name.
Abbreviation: EC 009
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 10.6 kg
Classification
  history:
Meteoritical Bulletin:  MB 111  (2023)  Eucrite-mmict
Recommended:  Eucrite-mmict    [explanation]

This is 1 of 279 approved meteorites classified as Eucrite-mmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 23 Jul 2022
Writeuphelp
Writeup from MB 111:

Erg Chech 009 (EC 009)        26.010°N, 1.938°W

Adrar, Algeria

Purchased: 2022 Feb

Classification: HED achondrite (Eucrite, monomict)

History: Found in Algeria and purchased by Ziyao Wang in early 2022 from a dealer in Laayoune, Morocco. The main mass was then purchased in China by Hui Jin and Jiachang Yu in February 2022.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Breccia composed mainly of equant mineral grains (mean grainsize ~0.25 mm) related to a microgabbroic eucrite lithology together with sparse related polymineralic lithic clasts. Major minerals are exsolved pigeonite and calcic plagioclase accompanied by accessory silica polymorph, ilmenite (with zircon inclusions), low-Ti chromite (intergrown with ilmenite) and troilite. No Fe metal was observed.

Geochemistry: Low-Ca pyroxene hosts (Fs60.8-61.4Wo2.6-1.6, FeO/MnO = 33, N = 4), augite exsolution lamellae (Fs26.9-27.5Wo44.5-43.3, FeO/MnO = 33-35, N = 3), plagioclase (An75.2-93.9Or3.2-0.2, N = 4).

Classification: Eucrite (monomict microgabbroic breccia).

Specimens: 79.4 g including a polished endcut at UWB; remainder with Mr. Hui Jin and Mr. Jiachang Yu.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Adrar
Place of purchase:China
Date:P 2022 Feb
Latitude:26.010°N
Longitude:1.938°W
Mass (g):10600
Pieces:1
Class:Eucrite-mmict
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):60.8-61.9; 26.9-27.5
Wollastonite (mol%):2.6-1.6; 44.5-43.3
Classifier:(A. Irving, UWS and P. Carpenter, WUSL)
Type spec mass (g):79.4
Type spec location:UWB
Main mass:H. Jin/J. Yu
Comments:Work name WZY-89; 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, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023)
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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang         
Geography:

Algeria
Coordinates:
     Recommended::   (26° 0' 36"N, 1° 56' 17"W)

Statistics:
     This is 1 of 200 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1344 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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