Meteoritical Bulletin: Entry for Abadla

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Abadla

Basic information

Name: Abadla
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2015
Country: Algeria
Mass: 222 g

Classification
history:

Meteoritical Bulletin:	MB 105	(2016)	Eucrite-cm
Recommended:			Eucrite-cm [explanation]

This is 1 of 54 approved meteorites classified as Eucrite-cm. [show all]
Search for other: Achondrites, Eucrites, and HED achondrites

Comments:

Approved 12 May 2016

Writeup

help

Writeup from MB 105:

Abadla 30°56’13.04’’N, 2°42’56.40’’W

Bechar, Algeria

Find: 2015 Mar 15

Classification: HED achondrite (Eucrite, cumulate)

History: Found by Mr. Abdelrahman about 15 km south of the village of Abadla, Algeria, on March 15, 2015. Purchased by Didi Moulay El Bechir in 2015.

Physical characteristics: Single stone with black fusion crust. A saw cut reveals a mosaic of gray, coarse-grained, interlocking crystals.

Petrography: (C. Agee, UNM) This cumulate rock consists of ~80% equilibrated, unzoned pyroxene, with no microscopically visible exsolution lamellae, and ~15% maskelynite. Most maskelynite domains are surrounded by pyroxene with radiating fractures suggesting shrinkage cracks. Accessory chromite, ilmenite, troilite, and iron oxide were observed.

Geochemistry: (C. Agee and N. Muttik, UNM) Low-Ca pyroxene Fs_39.1±1.3Wo_2.9±1.5, Fe/Mn=30±1, n=15; augite Fs_22.1±5.5Wo_32.1±10.0, Fe/Mn=28±3, n=5; plagioclase An_92.6±0.4, n=10.

Classification: Cumulate eucrite

Specimens: 21.12 g including a probe mount on deposit at UNM, Didi Moulay El Bechir holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:

State/Prov/County:	Bechar
Date:	2015 Mar 15
Latitude:	30°56'13.04''N
Longitude:	2°42'56.40''W
Mass (g):	221.8
Pieces:	1
Class:	Eucrite-cm
Shock stage:	high
Weathering grade:	low
Ferrosilite (mol%):	39.1±1.3, 22.1±5.5
Wollastonite (mol%):	2.9±1.5, 32.1±10.0
Classifier:	C. Agee, UNM
Type spec mass (g):	21.12
Type spec location:	UNM
Main mass:	Didi Moulay El Bechir
Finder:	Mr. Abdelrahman
Comments:	Field name CO-2; submitted by C. Agee, UNM

Institutions
and collections

UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)

Catalogs:

References:

Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full

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Geography:

Algeria

Algeria

Coordinates:
Recommended::	(30° 56' 13"N, 2° 42' 56"W)

Statistics:
This is 1 of 35 approved meteorites from Bechar, Algeria (plus 1 unapproved name)
This is 1 of 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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Synonyms

help

:

Abadla 001 (First meteorite in DCA)

Revision
history:

This lists important revisions made to data for this record.

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