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| Northwest Africa 11044 | |||||||||||||||||||||||||||||||
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| Basic information | Name: Northwest Africa 11044 This is an OFFICIAL meteorite name. Abbreviation: NWA 11044 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass:  104.7 g | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 300 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 9 Jun 2017 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 106:
Northwest Africa 11044 (NWA 11044) (Northwest Africa) Purchased: 2016 Classification: Martian meteorite (Shergottite) History: Two stones weighing 95.3 and 9.4 g were found and subsequently purchased in Zagora in 2016. Don Cline and John Sinclair acquired the samples from a meteorite prospector at the Tucson Gem and Mineral Show in February 2016. Physical characteristics: Sample is ovoid in shape and contain small patches of vesicular, black impact melt material (some of which contains embedded sand grains). The exterior surface is dark green and displays an igneous texture. Petrography: Description and classification (A. Love, App): Sample has an ophitic texture composed of ~73 vol% prismatic pyroxenes surrounding irregular-lath shaped, isotropic grains (maskelynitized plagioclase) and opaque grains. The sample is crosscut by vesicular melt veins and pools. Minerals are augite, pigeonite, maskelynite, ilmenite, pyrrhotite, merrillite, and silica polymorph. Geochemistry: (A. Love, App): Pyroxene crystals are complexly zoned with augite cores (Fs23.8±4.4Wo33.6±2.0, N=11; Fe/Mn=29.4±2.1) and subcalcic augite rims (Fs58.3±5.6Wo21.9±2.7, N=9; Fe/Mn=38.3±0.7) and pigeonite rims (Fs56.1±11.6Wo14.5±1.2, N=11; Fe/Mn=36.7±3.5). Oxygen isotopes (K. Ziegler, UNM): analyses of 3 acid-washed mineral separates by laser fluorination gave, respectively, d17O = 2.875, 2.948, 2.850; d18O = 4.886, 5.033, 4.826; D17O = 0.295, 0.291, 0.302 (data are linearized all per mil). Classification: Martian (shergottite, diabasic). Likely paired with NWA 8656. Specimens: PARI holds the main masses (71.44 and 9.4 g). A 20 g type specimen and one polished thin section are on deposit at App | ||||||||||||||||||||||||||||||
| Data from: MB106 Table 0 Line 0: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||
| Institutions and collections |
UNM: Institute of Meteoritics
MSC03 2050
University of New Mexico
Albuquerque NM 87131-1126
USA, United States; Website (institutional address; updated 12 Feb 2015) App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) PARI: Pisgah Astronomical Research Institute 1 Pari Dr Rosman, NC 28772, United States (institutional address; updated 13 Sep 2016) |
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| References: | Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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| Geography: |
Statistics: This is 1 of 9344 approved meteorites from (Northwest Africa) (plus 1872 unapproved names) | ||||||||||||||||||||||||||||||