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Rabt Sbayta 004
Basic information Name: Rabt Sbayta 004
     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 15.46 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 174 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 3 Mar 2017
Writeuphelp
Writeup from MB 106:

Rabt Sbayta 004        24.242°N, 14.675°W

Rio de Oro, Western Sahara

Find: 2016 Oct

Classification: Lunar meteorite (feldspathic breccia)

History: Found in October 2016 by Oubnaamar Salem in the lunar meteorite strewnfield near Gataa Sfar, and subsequently purchased by Darryl Pitt in December 2016 from a Moroccan dealer.

Physical characteristics: The single large stone (15464 g) was found sitting on the desert surface. The exterior is wind-ablated and lacks fusion crust; the fresh interior consists of angular whitish clasts in a dark gray matrix containing sparse small vesicles.

Petrography: (A. Irving and S. Kuehner, UWS) Breccia consisting of angular mineral grains of anorthite, orthopyroxene, pigeonite (some exsolved), augite, olivine, ilmenite, Cr-rich chromite, Ti-chromite, silica polymorph, fayalite, kamacite and troilite in a finer grained matrix of the same minerals. Portions of the matrix are vesicular and minor calcite is present.

Geochemistry: Olivine (Fa38.5-84.1, FeO/MnO = 70-86, N = 5), low-Ca pyroxene (Fs32.7-38.9Wo2.2-5.3, FeO/MnO = 58-73, N = 4), augite (Fs8.5-20.3Wo45.7-40.7, FeO/MnO = 70-71, N = 3), plagioclase (An94.6-97.3Or0.4-0.22, N = 3).

Classification: Lunar (feldspathic breccia). Likely paired with NWA 8222 and Rabt Sbayta 002 found in the same area.

Specimens: 24.4 g in the form of a two polished endcuts at UWB; remainder with DPitt.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Rio de Oro
Place of purchase:Morocco
Date:2016 Oct
Latitude:24.242°N
Longitude:14.675°W
Mass (g):15464
Pieces:1
Class:Lunar (feldsp. breccia)
Shock stage:low
Weathering grade:low
Fayalite (mol%):38.5-61.6
Ferrosilite (mol%):32.7-34.5; 8.5-20.3
Wollastonite (mol%):2.2-4.0; 45.7-40.7
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):24.4
Type spec location:UWB
Main mass:DPitt
Finder:O. Salem
Comments:MVCH 228; 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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
Catalogs:
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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Geography:

Western Sahara
Coordinates:
     Recommended::   (24° 14' 31"N, 14° 40' 30"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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