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| Aridal 019 | |||||||||||||||||||||||||||||||||||||
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| Basic information | Name: Aridal 019 This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2022 Country: Western Sahara Mass:  1368 g | ||||||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 336 approved meteorites classified as Lunar (feldsp. breccia). [show all] Search for other: Lunar meteorites | ||||||||||||||||||||||||||||||||||||
| Comments: | Approved 20 Jun 2022 | ||||||||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 111:
Aridal 019 25.747°N, 13.478°W Rio de Oro, Western Sahara Purchased: 2022 Feb Classification: Lunar meteorite (feldspathic breccia) History: Five similar-appearing stones were found together. Physical characteristics: One large stone (1207 g) plus four smaller stones (total 161 g). All stones exhibit a brown, knobby exterior with light desert patina; cut interior surfaces reveal small white to beige clasts within a fine grained tan matrix. Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fine grained breccia composed of mineral clasts of anorthite, altered olivine, low-Ca pyroxene, pigeonite and augite in a very fine grained matrix containing low-Ti, high-Al chromite, ilmenite and minor secondary barite. Most olivine has been completely altered to an iddingsite-like hydrous phase with low oxide sums and elevated FeO/MnO ratios; this is very similar to the altered olivine documented in paired lunar meteorites Tisserlitine 001 and NWA 13621. Geochemistry: Anorthite (An95.9-97.7Or0.1, N = 3), low-Ca pyroxene (Fs28.5-35.0Wo2.0-4.5, FeO/MnO = 60-71, N = 4), pigeonite (Fs31.0-31.9Wo8.1-8.9, FeO/MnO = 57-60), augite (Fs20.1-21.9Wo39.6-35.1, FeO/MnO = 51-53, N = 2), unaltered olivine (Fa39.3, FeO/MnO = 92, N = 1). Classification: Lunar (feldspathic breccia). Although this material has some mineralogical similarites to Tisserlitine 001 and NWA 13621 found in eastern Mali, these stones have a different external appearance and the find site is reliably at a location much farther to the west. Specimens: 22.4 g including one polished endcut at UWB; remainder with Mr. T. Boudreaux. | ||||||||||||||||||||||||||||||||||||
| Data from: MB111 Table 0 Line 0: |
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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) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) Boudreaux: Terry Boudreaux, Illinois, United States (private address) |
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| Catalogs: |
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| References: | Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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Geography:
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Statistics: This is 1 of 50 approved meteorites from Rio de Oro, Western Sahara This is 1 of 280 approved meteorites from Western Sahara (plus 20 unapproved names) | ||||||||||||||||||||||||||||||||||||
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