Description: EXCEPTIONAL SPECIMENS ANOMALOUS EUCRITE MONOMICTMETEORITE 69.7g YOU ARE PURCHASING AANOMALOUS EUCRITE MONOMICT METEORITE This meteorite was identified and studied by Dr. Anthony J. Irving and team at University of Washington; commenting on this meteorite: This specimen is anomalous because of the highly ferroan pyroxene compositions (with the Fs content of low-Ca pyroxene approaching 70 mole%) AUTHENTICITY is GUARANTEED CERTIFICATE OF AUTHENTICITY INCLUDED This unique stunning item is a piece of history from Algeria, specifically a Anomalous Eucrite Monomict Meteorite weighing 69.7g. Its rarity makes it a valuable addition to any collection, especially for those interested in meteorites and tektites, rocks, fossils, and minerals, and collectibles. The item is a must-have for any serious collector or enthusiast who appreciates unique and remarkable pieces. Most of what we are selling comes directly from family and friends finding meteorites in the desert and sending them to us here in U.S.. With a family member now living here and as one of the founders of NWA Direct Meteorites, we hope to continue to provide great meteorites at reasonable prices. We are open to offers on all of our meteorites.Northwest Africa 16490Basic informationName: Northwest Africa 16490 This is an OFFICIAL meteorite name. Abbreviation: NWA 16490 Observed fall: No Year found: 2023 Country: Algeria Mass: 664 g Classification history:Recommended: Eucrite-mmict-an [explanation] This is 1 of 2 approved meteorites classified as Eucrite-mmict-an. [show all] Search for other: Achondrites, Eucrites, and HED achondrites Comments:Approved 25 Mar 2024WriteupWriteup from MB 113: Northwest Africa 16490 (NWA 16490)AlgeriaFind: 2023 Feb 12Classification: HED achondrite (Eucrite, monomict, anomalous)History: A group of similar-appearing stones was found near Adrar, Algeria on February 12, 2023 by a Sahrawi team represented by David Lehman.Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Fresh monomict breccia composed of lithic diabasic eucrite clasts plus related crystalline debris in a relatively sparse fine-grained matrix. The lithic clasts have ophitic texture and consist predominantly of exsolved pigeonite and calcic plagioclase with accessory silica polymorph, ilmenite (with inclusions of zircon and baddeleyite), low-Ti chromite and troilite. Pyroxene in this specimen is unusually Fe-rich and both plagioclase and silica polymorph are unusually abundant in comparison to most eucrites.Geochemistry: Low-Ca pyroxene hosts (Fs67.0-69.7Wo1.6-4.8, FeO/MnO = 31, N = 4), augite exsolution lamellae (Fs32.1-36.0Wo43.4-49.2, FeO/MnO = 32-36, N = 4), plagioclase (An82.2-92.1Or0.7-0.4, N = 4).Classification: Eucrite (monomict breccia, anomalous). This specimen is anomalous because of the highly ferroan pyroxene compositions (with the Fs content of low-Ca pyroxene approaching 70 mole%), as also observed in some other eucrites such as NWA 11729, NWA 12445, NWA 15076, and NWA 15202.Specimens: 20.9 g including one polished thin section at UWB; remainder with Mr. D. Lehman.Data from: MB113 Table 0 Line 0:Date:2023 Feb 12Mass (g):664Pieces:10Class:Eucrite-mmict-anShock stage:lowWeathering grade:lowFerrosilite (mol%):67.0-69.7; 32.1-36.0Wollastonite (mol%):1.6-4.8; 43.4-39.2Classifier:A. Irving, UWS, and P. Carpenter, WUSLType spec mass (g):20.9Type spec location:UWBMain mass:D. LehmanComments:Work name DL 1166; submitted by A. IrvingInstitutions and collectionsUWS: 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) Catalogs:References:Published in Meteoritical Bulletin, no. 113, in preparation (2024) Find references in NASA ADS: Find references in Google Scholar: Geography: Coordinates:Unknown. Statistics: This is 1 of 1344 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) Crosslinks: This lists all records that are linked to this record and to each other.Also see: This lists the most popular meteorites among people who looked up this meteorite.Revision history: This lists important revisions made to data for this record.
Price: 418 USD
Location: Appleton, Wisconsin
End Time: 2024-08-28T03:08:43.000Z
Shipping Cost: N/A USD
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