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Aridal 011
Basic information Name: Aridal 011
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2012
Country: Western Sahara
Mass:help 568 g
Classification
  history:
Meteoritical Bulletin:  MB 104  (2015)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3132 approved meteorites classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 9 Nov 2015
Writeuphelp
Writeup from MB 104:

Aridal 011        25°38.965’N, 13°50.790’W

Rio de Oro, Western Sahara

Find: 2012 Feb 16

Classification: Ordinary chondrite (LL5)

History: Discovered by S. Buhl and A. Kopelt during natural history expedition close to the astronomical point of Ammat el Quebch in the Boujdour area on 2012 Feb 21.

Physical characteristics: One stone of 285 g, nearly complete, covered with gray-black crust; saw-cut shows chondrules and various clasts set in fine-grained gray groundmass. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.65. One stone of 103 g, dominantly covered with gray-black crust; saw-cut shows chondrules and various clasts set in fine-grained gray groundmass. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.60. One stone of 180 g, nearly covered with gray-black crust. Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.29.

Petrography: Microprobe examination of a polished thin section shows moderately developed chondrules (porphyritic, granular, barred) up to 2 mm (av. 0.9 mm), chondrule and mineral fragments in recrystallized matrix with few metal grains.

Geochemistry: (R. Bartoschewitz, P. Appel and B. Mader, Kiel) Olivine: Fa27.4-28.8; av. Fa28.4±0.38 (n=13); pyroxene Fs22.8-29.1Wo1.2-1.9; av. Fs23.9±1.8Wo1.6±0.17 (n=10); feldspar An10-17Or6-18; kamacite Ni = 4.5-4.7, Co =1.3 wt.-%; chromite CRAL = 86.2; FFM = 91.8; Fe/Mg=10,95.

Classification: Ordinary Chondrite (LL5) of shock stage S3 and weathering grade W1.

Specimens: 21.6 g on deposit at FSAC

Data from:
  MB104
  Table 0
  Line 0:
State/Prov/County:Rio de Oro
Date:2012 Feb 16
Latitude:25°38.965'N
Longitude:13°50.790'W
Mass (g):568
Pieces:3
Class:LL5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):28.4±0.38 (n=13)
Ferrosilite (mol%):23.9±1.8 (n=10)
Wollastonite (mol%):1.6±0.17
Magnetic suscept.:4.66
Classifier:R. Bartoschewitz; H. Chennaoui Aoudjehane, FSAC
Type spec mass (g):21.62
Type spec location:FSAC
Main mass:S. Buhl
Finder:S. Buhl, A. Koppelt
Comments:Working name H4+H2+SB H1; submitted by H. Chennaoui Aoudjehane
Institutions
   and collections
Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
FSAC: Universite Hassan II Casablanca, Faculte des Sciences Ain Chock, Departement de Géologie, BP 5366 Maârif, Casablanca, Morocco (institutional address; updated 9 Jan 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 104, MAPS 52, 2284, Octover 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12930/full
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Geography:

Western Sahara
Coordinates:
     Recommended::   (25° 38' 58"N, 13° 50' 47"W)

Statistics:
     This is 1 of 36 approved meteorites from Rio de Oro, Western Sahara
     This is 1 of 204 approved meteorites from Western Sahara (plus 20 unapproved names)
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