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Erg Chech 003
Basic information Name: Erg Chech 003
     This is an OFFICIAL meteorite name.
Abbreviation: EC 003
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 1100 g
Classification
  history:
Recommended:  CR2    [explanation]

This is 1 of 184 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 17 Oct 2021
Writeuphelp
Writeup from MB 110:

Erg Chech 003 (EC 003)        26°01.92’N, 1°36.66’W

Adrar, Algeria

Find: 2021

Classification: Carbonaceous chondrite (CR2)

History: Found in 2021 by Ali Mustapha near the town of In Zghmir. Later purchased in 2021 by Shun-Chung Yang.

Physical characteristics: Sample contains visible fusion crust. A slice taken of the sample reveals an assortment of chondrules and metal grains.

Petrography: (D. Sheikh, Cascadia) This sample is composed of chondrules (Primarily porphyritic Type I, Av. 1.3 mm, up to 2.5 mm, ~70 vol. %) set within a fine-grained, hydrous matrix (~30 vol. %). Metal occurs either as blobs within chondrules or as rims around chondrules.

Geochemistry: Type I Olivine (Fa1.7±0.4, range Fa1.0-2.3, n=21), Type II Olivine (Fa38.2, n=1), Low-Ca Pyroxene (Fs3.0±1.4Wo0.8±0.2, range Fs1.3-6.8Wo0.5-1.3, n=11). Average EPMA analytical totals in the matrix 81.9 wt. % (n=10).

Classification: Carbonaceous chondrite (CR2) based on texture, mineral compositions and low matrix analytical totals.

Specimens: 20.03 g at NHMLAC; main mass with Shun-Chung Yang and Juan Chen.

Data from:
  MB110
  Table 0
  Line 0:
State/Prov/County:Adrar
Origin or pseudonym:In Zghmir
Date:2021
Latitude:26°01.92'N
Longitude:1°36.66'W
Mass (g):1100
Pieces:9
Class:CR2
Shock stage:S2
Weathering grade:moderate
Fayalite (mol%):1.7±0.4, 38.2
Ferrosilite (mol%):3.0±1.4
Wollastonite (mol%):0.8±0.2
Classifier:D. Sheikh, Cascadia
Type spec mass (g):20.03
Type spec location:NHMLAC
Main mass:Shun-Chung Yang, Juan Chen
Finder:Ali Mustapha
Comments:Submitted by Daniel Sheikh
Institutions
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
NHMLAC: Natural History Museum of Los Angeles County 900 Exposition Blvd., Los Angeles, CA 90007 , United States; Website (institutional address; updated 17 Jul 2021)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   
Public domain photographs:
Daniel Sheikh   
Geography:

Algeria
Coordinates:
     Recommended::   (26° 1' 55"N, 1° 36' 40"W)

Statistics:
     This is 1 of 180 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1232 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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