| MetSoc Home Publications Contacts |
|
||
|
||
| Aridal 019 | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 315 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: |
|
||||||||||||||||||||||||||||||||||||
| 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, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) Boudreaux: Terry Boudreaux, Illinois, United States (private address) |
||||||||||||||||||||||||||||||||||||
| Catalogs: |
| ||||||||||||||||||||||||||||||||||||
| References: | Published in Meteoritical Bulletin, no. 111, in preparation (2022)
| ||||||||||||||||||||||||||||||||||||
Geography:
|
Statistics: This is 1 of 47 approved meteorites from Rio de Oro, Western Sahara This is 1 of 265 approved meteorites from Western Sahara (plus 20 unapproved names) | ||||||||||||||||||||||||||||||||||||
| Proximity search: | |||||||||||||||||||||||||||||||||||||