Martian Meteorite Slice 13.31g - Peridotitic Shergottite NWA 13366
On Offer: 13.31 GRAM MARTIAN PERIDOTITIC (LHERZALITIC) SHERGOTTITE METEORITE SLICE
Dimensions: Approximately 53mm x 49mm x 1.81mm
|Northwest Africa 13366|
Name: Northwest Africa 13366
This is an OFFICIAL meteorite name.
Abbreviation: NWA 13366
Observed fall: No
Year found: 2019
Mass: 417 g
This is 1 of 229 approved meteorites
|Comments:||Approved 2 Aug 2020|
Writeup from MB 109:
Northwest Africa 13366 (NWA 13366)
Classification: Martian meteorite (Shergottite)
History: Purchased from a nomad in Algeria in 2019 and sent to Dustin Dickens at the Tucson Gem and Mineral Show, February 2020.
Physical characteristics: Single stone, saw cut reveals an ultramafic cumulate rock with ophitic to poikilitic textures with mm-size pale yellow and dark gray grains.
Petrography: (C. Agee, UNM) Microprobe examination shows approximately 60% olivine, 35% pyroxene, and 5% maskelynite. Two distinct pyroxene trends are present 1) Mg-rich low calcium pyroxene trending to slightly more Fe-rich pigeonite, 2) Mg-rich augite trending to more Ca-rich augite. Ilmenite, Fe-sulfide, and merrillite are minor ubiquitous phases.
Geochemistry: (C. Agee, UNM) Olivine Fa34.5±2.6, Fe/Mn=50±3, n=15; low Ca-pyroxene Fs24.4±4.6Wo5.9±3.8, Fe/Mn=30±2, n=9; augite Fs16.0±1.2Wo35.0±3.1, Fe/Mn=24±1, n=4; maskelynite An53.7±1.1Ab44.9±1.2Or1.4±0.1, n=6.
Classification: Martian peridotitic shergottite. Macroscopic textural appearance similar to NWA 1950 and ALHA 77005. Paired with NWA13325
Specimens: 20 g on deposit at UNM, Dustin Dickens holds the main mass.
|UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States
Published in Meteoritical Bulletin, no. 109, in preparation (2020)
This is 1 of 1015 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)
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