7.48g NWA 13274 I Ungrouped Achondrite Meteorite Slice
On Offer: 7.48 gram slice of the rare and unique NWA 13274 achondrite-ung
Slice Dimensions: Approximately 37.4mm x 30.2mm x 2.9mm
Classification: Achondrite Ungrouped - this is an ungrouped achondrite from an unknown differentiated parent body.
Description: 7.48 gram slice of the achondrite ungrouped meteorite with official name NWA 13274. This slice is polished on one side.
|Northwest Africa 13274|
Name: Northwest Africa 13274
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13274
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass: 256 g
This is 1 of 101 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites
|Comments:||Approved 2 May 2020|
Writeup from MB 109:
Northwest Africa 13274 (NWA 13274)
Classification: Ungrouped achondrite
History: Purchased by Mark Lyon in December 2019 and January 2020 from two separate Moroccan dealers.
Physical characteristics: A total of eight similar-appearing brown stones (combined weight 255.5 g).
Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Analysis of two different stones shows this material to be composed predominantly of larger grains (mean size ~0.6 mm) of finely-exsolved low-Ca and high-Ca pyroxenes plus polygranular calcic plagioclase, together with accessory silica polymoprh, ferroan olivine, merrillite, chromite, ilmenite, Cr ulvöspinel, troilite and pentlandite (stained).
Geochemistry: Low-Ca pyroxene (Fs62.2-63.6Wo6.3-6.8, FeO/MnO = 60-65, N = 6), high-Ca pyroxene (Fs34.8-35.9Wo38.1-39.1, FeO/MnO = 60-69, N = 5), olivine (Fa72.1-82.0, FeO/MnO = 90-100, N = 4), plagioclase (An84.8-88.2Or0.3, N = 3).
Classification: Achondrite (ungrouped). Paired with NWA 011, NWA 2400, NWA 2976, NWA 4587, NWA 4901 and NWA 8545.
Specimens: 20.7 g including one polished thin section at UWB; remainder with Mr. M. Lyon.
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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