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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 177 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Daniel Sheikh   
Geography:

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

Statistics:
     This is 1 of 166 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 1153 approved meteorites from Algeria (plus 27 unapproved names) (plus 4 impact craters)
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