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Erg Chech 001
Basic information Name: Erg Chech 001
     This is an OFFICIAL meteorite name.
Abbreviation: EC 001
Observed fall: No
Year found: 2017
Country: Algeria
Mass:help 1266 g
Classification
  history:
Recommended:  Diogenite    [explanation]

This is 1 of 422 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 27 Mar 2018
Writeuphelp
Writeup from MB 107:

Erg Chech 001 (EC 001)        26.0555°N, 2.0797°W

Algeria

Find: 2016 Dec

Classification: HED achondrite (Diogenite)

History: Three similar looking stones (weighing 998, 138, and 130 g) were found in December 2016 and January 2017 in the Erg Chech Desert, 235 km WSW of the village of Tawrirt in the Adrar region of Algeria. The 138 g stone was subsequently acquired by John Higgins.

Physical characteristics: The 138 g stone lacks fusion crust and the fresh interior is mostly yellowish-green with sparse opaque grains.

Petrography: (A. Irving and S. Kuehner, UWS) Protogranular aggregate of predominantly orthopyroxene (mean grainsize 0.9 mm) plus minor chromite (containing blebs of troilite) and rare taenite (containing minor Cu).

Geochemistry: Orthopyroxene (Fs23.1-23.2Wo1.7-1.8, FeO/MnO = 28-33, N = 3).

Classification: Diogenite.

Specimens: 21.6 g including one polished endcut at UWB; remainder of the 138 g stone with Mr. J. Higgins; other stones with the anonymous finders.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Algeria
Date:2016 Dec
Latitude:26.0555°N
Longitude:2.0797°W
Mass (g):1266
Pieces:3
Class:Diogenite
Shock stage:low
Weathering grade:low
Ferrosilite (mol%):23.1-23.2
Wollastonite (mol%):1.7-1.8
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):21.6
Type spec location:UWB
Main mass:J. Higgins
Comments:Work name JH17-6; 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Geography:

Algeria
Coordinates:
     Recommended::   (26° 3' 20"N, 2° 4' 47"W)

Statistics:
     This is 1 of 142 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
     This is 1 of 961 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)
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