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Aridal 017
Basic information Name: Aridal 017
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2016
Country: Western Sahara
Mass:help 590 g
Classification
  history:
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 170 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 20 Feb 2018
Writeuphelp
Writeup from MB 107:

Aridal 017        25.634°N, 13.193°W

Rio de Oro, Western Sahara

Purchased: 2016 Sep

Classification: Lunar meteorite (feldspathic breccia)

History: Found in Morocco in sandy soil, several meters from the find site for Northwest Africa 10608 (which was found earlier by desert truffle hunters). The stone was purchased by Dr. David Gregory in September 2016 from a Moroccan dealer at the Denver Show.

Physical characteristics: A single grayish stone (590 g) lacking fusion crust but with a glossy external patina. The fresh interior consists of small whitish clasts in a dark-gray matrix.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia composed of angular mineral clasts of anorthite, olivine, orthopyroxene, pigeonite, ferropigeonite, augite, silica polymorph, TI-chromite and ilmenite (with rare inclusions of baddeleyite) in a fine grained matrix of the same minerals plus minor kamacite, troilite and K-bearing glass.

Geochemistry: Olivine (Fa10.1-27.0, FeO/MnO = 74-106, N = 3), orthopyroxene (Fs20.9Wo4.5, FeO/MnO = 51), pigeonite (Fs21.7Wo7.0, FeO/MnO = 54), ferropigeonite (Fs63.1Wo18.5, FeO/MnO = 72), augite (Fs17.3Wo40.5, FeO/MnO = 46), anorthite (An95.2-95.4Or0.5, N = 2).

Classification: Lunar (feldspathic regolith breccia). This stone was found at the same place as Northwest Africa 10608 and probably is paired with it.

Specimens: 10.1 g including one polished endcut at UWB; 10.1 g at ROM; main mass with Gregory.

Data from:
  MB107
  Table 0
  Line 0:
State/Prov/County:Rio de Oro
Place of purchase:Denver
Date:P 2016 Sep
Latitude:25.634°N
Longitude:13.193°W
Mass (g):590
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):10.1-27.0
Ferrosilite (mol%):20.9-21.7
Wollastonite (mol%):4.5-7.0
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20.2
Type spec location:ROM/UWB
Main mass:D. Gregory
Comments:Work name DG18-1; submitted by A. Irving
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
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)
Gregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, in preparation (2018)
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Geography:

Western Sahara
Coordinates:
     Recommended::   (25° 38' 2"N, 13° 11' 35"W)

Statistics:
     This is 1 of 36 approved meteorites from Rio de Oro, Western Sahara
     This is 1 of 202 approved meteorites from Western Sahara (plus 20 unapproved names)
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