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Northwest Africa 2626 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 2626 This is an OFFICIAL meteorite name. Abbreviation: NWA 2626 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 298 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 89:
Northwest Africa 2626 Northwest Africa Purchased 2004 November Martian meteorite (basaltic shergottite) A 31.07 g completely crusted stone was purchased by MFarmer. Classification and mineralogy (J. Wittke and T. Bunch, NAU; A. Irving and S. Kuehner, UWS): olivine-orthopyroxene-phyric basaltic rock composed of euhedral to subhedral olivine phenocrysts and preferentially-oriented, prismatic low-Ca pyroxene phenocrysts in a groundmass of zoned pigeonite (Fs26.4Wo12.4 to Fs34.1Wo12.4) FeO/MnO = 27-31; maskelynite (An66.0-71.0Or0.4), olivine (Fa43.6-47.3) FeO/MnO = 51-58; Ti-chromite (Cr/(Cr+Al) = 0.72-0.79; 9.2-19.8 wt. % TiO2), chromite (Cr/(Cr+Al) = 0.71-0.86; 0.7-2.0 wt. % TiO2), merrillite, ilmenite, ulvöspinel and pyrrhotite. Olivine phenocrysts are zoned from Fa16.7 cores to Fa43.3 rims, and pyroxene phenocrysts have irregular cores of orthopyroxene (as magnesian as Fs17.9Wo2.4, with ~0.03 wt. % TiO2 and ~0.4 wt. % Al2O3) mantled by pigeonite (Fs25.4Wo4.4 to Fs37.0Wo12.7) with minor subcalcic augite (Fs21.7-24.0Wo 30.8-31.1). It is apparently not terrestrially paired to NWA 1195 and NWA 2046 (Irving et al., 2004b; 2005). Specimens: type specimen, 6.4 g, and one polished thin section, NAU; one polished thin section, UWS; main mass, Anonymous. | ||||||||||||||||||||||||||||
Data from: MB89 Table 7 Line 344: |
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Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Photos: |
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |