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| Shişr 161 | |||||||||||||||||||||||||||||
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| 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:  57.2 g | ||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 102 approved meteorites classified as Lunar. [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||
| Comments: | Approved 23 Dec 2008 | ||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 95:
Shişr 161 18°36.25′N 18°36.25′N Oman 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). | ||||||||||||||||||||||||||||
| Data from: MB95 Table 7 Line 138: |
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| 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) 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) |
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| References: | Published in Meteoritical Bulletin, no. 95, MAPS 44, 429-462 (2009)
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Geography:
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Statistics: This is 1 of 2167 approved meteorites from Zufar, Oman (plus 24 unapproved names) This is 1 of 4001 approved meteorites from Oman (plus 436 unapproved names) | ||||||||||||||||||||||||||||
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