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| Wan Zawatin 001 | |||||||||||||||||||||||||||||||||||
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| Basic information | Name: Wan Zawatin 001 This is an OFFICIAL meteorite name. Abbreviation: WZ 001 Observed fall: No Year found: 2022 Country: Libya Mass:  440 g | ||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 138 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites | ||||||||||||||||||||||||||||||||||
| Comments: | Approved 11 Dec 2022 | ||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Wan Zawatin 001 (WZ 001) 29.077°N, 10.743°E Ghadamis, Libya Purchased: 2022 Aug Classification: Ungrouped achondrite History: Found in northwestern Libya and purchased by Aziz Habibi in August 2022 from a dealer in Agadir, Morocco. Physical characteristics: The exterior of this distinctive specimen (440 g) is partially coated by thin translucent fusion crust varying in color from beige to almost black. The fresh interior is overall almost pure white in color and is composed predominantly of white prismatic grains with subordinate yellow-green equant grains. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Relatively coarse grained aggregate with some finer granular regions (mean grainsize ~0.7 mm). Composed predominantly of anorthite (76 vol.%) and subordinate orthopyroxene (24 vol.%) together with accessory low-Ti chromite and troilite. Because of the simple and homogeneous mineralogy of this meteorite, it was possible to compute an accurate mineral mode from bulk rock XRF results and mineral compositions determined by EMP analysis. Geochemistry: Anorthite (An95.4-95.6Or0.1-0.2, N = 3), orthopyroxene (Fs24.5-25.2Wo2.3-2.6, FeO/MnO = 26-28, N = 4). Oxygen isotopes (C. Sonzogni and J. Gattacceca, CEREGE): analysis by laser fluorination of a 1.5 mg aliquot from acid-washed powder produced by powdering a 85 mg bulk sample gave δ17O 1.774, δ18O 3.821, Δ17O -0.236 per mil (for a TFL slope of 0.526). Classification: Achondrite (ungrouped, anorthite-rich with diogenitic affinities). Despite the apparent mineralogical and oxygen isotopic affinities with diogenites, it is recommended that such a highly feldspathic achondrite should not be called a diogenite (even a noritic diogenite). The amount of plagioclase is insufficient (<90 vol.%) for the term anorthositic to be applied. Specimens: 20.1 g including one polished thin section and one polished mount at UWB; remainder with A. Habibi | ||||||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||||
| Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) 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) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) |
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| References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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Geography:
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Statistics: This is 1 of 33 approved meteorites from Ghadamis, Libya (plus 2 unapproved names) This is 1 of 1540 approved meteorites from Libya (plus 23 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||||
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