Meteoritical Bulletin: Entry for Erg Chech 005

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Erg Chech 005

Basic information

Name: Erg Chech 005
This is an OFFICIAL meteorite name.
Abbreviation: EC 005
Observed fall: No
Year found: 2021
Country: Algeria
Mass: 584 g

Classification
history:

Meteoritical Bulletin:	MB 111	(2023)	Eucrite-melt breccia
Recommended:			Eucrite-melt breccia [explanation]

This is 1 of 104 approved meteorites classified as Eucrite-melt breccia. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 15 Jan 2022

Writeup

help

Writeup from MB 111:

Erg Chech 005 (EC 005) 26°08’35’’N, 02°23’21’’W

Adrar, Algeria

Purchased: 2021 Dec

Classification: HED achondrite (Eucrite, melt breccia)

History: Purportedly found in June 2021 within the Erg Chech DCA in Algeria.

Petrography: (K. Metzler, IfP) Polymict achondritic melt breccia, consisting of lithic clasts (diogenitic pyroxenite, Fe,Ni-metal-bearing melt rocks up to ~5 mm) and mineral fragments (eucritic and diogenitic pyroxenes, plagioclase), embedded in large amounts of crystallized melt. Accessories are chromium spinel, troilite, silica polymorph, and Ni-bearing metallic iron (mostly weathered).

Geochemistry: Mineral compositions and geochemistry: Eucritic pyroxene: Fs_37.6±1.9Wo_10.4±2.0(Fs_35.3-39.6Wo_8.6-13.1); mean Fe/Mn (at.): 31.6; n=6. Diogenitic pyroxene: Fs_26.2±2.8Wo_1.5±0.2(Fs_22.2-31.1Wo_1.3-1.9); mean Fe/Mn (at.): 28.2; n=9. Plagioclase An_90.7±1.7Or_0.2±0.3(An_86.3-92.6Or_0.0-0.8); n=12.

Classification: Eucrite (melt breccia), based on texture and mineral chemistry.

Data from:
  MB111
  Table 0
  Line 0:

State/Prov/County:	Adrar
Place of purchase:	Mauritania
Date:	P 2021 Dec
Latitude:	26°08'35''N
Longitude:	02°23'21''W
Mass (g):	584
Pieces:	1
Class:	Eucrite-melt breccia
Shock stage:	high
Weathering grade:	high
Ferrosilite (mol%):	37.6±1.9
Wollastonite (mol%):	10.4±2.0
Classifier:	K. Metzler, IfP
Type spec mass (g):	20
Type spec location:	IfP
Main mass:	Meteorite Museum & Shop, Stephan Decker, Oberwesel, Germany
Comments:	Submitted by K. Metzler, IfP

Institutions
and collections

IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)

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:

Credit	Photos
Public domain photographs:
Knut Metzler

Geography:

Algeria

Algeria

Coordinates:
Recommended::	(26° 8' 35"N, 2° 23' 21"W)

Statistics:
This is 1 of 201 approved meteorites from Adrar, Algeria (plus 1 unapproved name)
This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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Revision
history:

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