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Erg Chech 008
Basic information Name: Erg Chech 008
     This is an OFFICIAL meteorite name.
Abbreviation: EC 008
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 700 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 6 Aug 2022
Writeuphelp
Writeup from MB 111:

Erg Chech 008 (EC 008)        26°01.92’N, 1°36.66’W

Adrar, Algeria

Purchased: 2022

Classification: Carbonaceous chondrite (CR2)

History: The fragments were found by Mr. Ali Mftha while searching for meteorites in the Erg Chech 003 strewn field.

Physical characteristics: Many dark brownish fragments without fusion crust.

Petrography: The meteorite is predominantly composed of large, mostly porphyritic and partly metal-rimmed type I chondrules (apparent mean diameter about 1 mm) set into a fine-grained ferroan matrix. Few type II chondrule fragments and some small CAIs have been detected. Metal is present as rims around and as blobs within chondrules. Sulfides occur in type II chondrule fragments and the matrix. Matrix contains framboids of mostly rounded magnetite grains.

Geochemistry: olivine in type I chondrules: Fa1.7±0.7 (Fa0.7-3.2, Cr2O3: 0.48±0.18 wt%, n=15; low-Ca pyroxene: Fs1.9±0.1Wo0.8±0.1 (Fs1.7-2.1Wo0.7-1.1, n=11); olivine in type II chondrules: Fa30.4±13.0 (Fa11.0-51.4, n=12). Matrix analyses yield FeO=34.7±1.2 wt% and an average total of 86.8±1.2 wt% (5 µm defocused beam, N=12), the latter indicating the presence of hydrous minerals.

Classification: CR2 chondrite; likely paired with Erg Chech 003

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Adrar
Place of purchase:Algeria
Date:P 2022
Latitude:26°01.92’N
Longitude:1°36.66’W
Mass (g):700
Pieces:many
Class:CR2
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):1.7±0.7 (n=15)
Ferrosilite (mol%):1.9±0.1 (n:11)
Wollastonite (mol%):0.7±1.1
Classifier:A. Greshake, MNB
Type spec mass (g):23
Type spec location:MNB
Main mass:Younes Chaoui and Ali Mftah
Finder:Ali Mftah
Comments:Submitted by Ansgar Greshake
Institutions
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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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 1236 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)
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