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Shişr 161
Basic information Name: Shişr 161
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2008
Country: Oman
Mass:help 57.2 g
Meteoritical Bulletin:  MB 95  (2009)  Lunar feldspathic breccia
Recommended:  Lunar    [explanation]

This is 1 of 106 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 23 Dec 2008
Writeup from MB 95:

Shişr 161        18°36.25′N 18°36.25′N


Find: January 2008

Achondrite (lunar, feldspathic fragmental breccia)

History: One stone of 57.2 g found by Michael Farmer and later sold to Philip Mani.

Physical characteristics: The meteorite lacks an obvious fusion crust but has the frosted, ablated exterior typical of Omani lunar stones. The interior is light brown with few fractures, and terrestrial weathering is negligible.

Petrography (A. Foreman, WUSL; A. Irving and S. Kuehner, UWS): The meteorite is a fragmental breccia composed of a variety of lithic clasts (3–7 mm) and mineral fragments (0.3–0.4 mm) of olivine, plagioclase, augite, and pigeonite set in a fine-grained matrix with some glass veins. Lithic clasts include feldspathic granulitic breccia (plagioclase matrix with interstitial grains of granoblastic olivine), spherulitic basalt consisting of dominantly lath-shaped plagioclase and pyroxene, fragmental breccia with 0.3–0.4 mm clasts of plagioclase, olivine, augite, and pigeonite set in a fine-grained light-brown/gray matrix, and a granophyre composed of plagioclase, pigeonite, chromite, and ilmenite. No regolith components (glass spherules) have been identified. Very minor FeNi metal.

Geochemistry (A. Foreman, WUSL): Feldspathic granulitic breccia: olivine (Fa20.9–37.2, FeO/MnO = 73–115), plagioclase (An94.5–97.7 Or0.0–0.3); basaltic clast: 60.0% plagioclase (An94.5–96.7 Or0.2–0.5), 34.8% orthopyroxene (Fs41.7–47.1 Wo2.5–3.9, FeO/MnO = 55.2–59.4), 3.9% augite (Fs14.9–26.6 Wo30.7–41.9, FeO/MnO = 46.3–62.5), 0.3% ilmenite, fragmental-breccia clast: plagioclase (An96.6 Or0.4), olivine (Fa35.4–39.3, FeO/MnO = 82–95), augite (Fs16.4–16.9 Wo38.9–39.8, FeO/MnO = 40.6–41.0); mineral fragments: plagioclase (An93.9–98.6 Or0.0–0.6), olivine (Fa17.4–62.5, FeO/MnO =75–101), augite (Fs10.3–51.4 Wo21.4–42.4, FeO/MnO = 29.5–88.2), pigeonite (Fs27.6–47.3 Wo8.1–19.5, FeO/MnO = 49.9–63.1).

Bulk composition (R. Korotev, WUSL): FeO 5.6 wt%, Sc 13 ppm, Ni 90 ppm, Sm 0.64 ppm, Th 0.16 ppm.

Classification: Achondrite (lunar, feldspathic fragmental breccia).
Specimens: A total of 11.5 g is on deposit at UWS. Thin section at WUSL. The main mass is held by Mr. P. Mani.  

Data from:
  Table 7
  Line 138:
State/Prov/County:Zufar, Oman
Origin or pseudonym:Desert plain
Mass (g):57.2
Class:Lunar feldspathic breccia
Ferrosilite (mol%):41.7-47.1
Wollastonite (mol%):2.5-3.9
Classifier:P. Mani and T. Irving
Type spec mass (g):11.5
Type spec location:WUSL
Main mass:PMani
   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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
PMani: Philip Mani, 20726 Stone Oak Parkway, Suite 116, San Antonio, TX 78258 , United States (private address; updated 2 Jan 2010)
References: Published in Meteoritical Bulletin, no. 95, MAPS 44, 429-462 (2009)
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Doug R   

     Recommended::   (18° 36' 15"N, 53° 54' 53"E)

     This is 1 of 2166 approved meteorites from Zufar, Oman (plus 27 unapproved names)
     This is 1 of 3997 approved meteorites from Oman (plus 442 unapproved names)
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