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Northwest Africa 6572 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6572 This is an OFFICIAL meteorite name. Abbreviation: NWA 6572 Observed fall: No Year found: 2010 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 135 approved meteorites classified as Achondrite-ung. [show all] Search for other: Achondrites, Ungrouped achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 18 Feb 2012 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 100:
Northwest Africa 6572 (NWA 6572) (Northwest Africa) Purchased: Oct 2010 Classification: Ungrouped achondrite History: Purchased in 2010 October by Thomas Webb from a Moroccan dealer in Erfoud. Physical characteristics: A group of 17 similar-looking dark-brown stones weighing in total 50.2 g. Petrography: Protogranular texture. Composed predominantly of olivine with accessory clinopyroxene, orthopyroxene, chromite, altered kamacite and troilite. Plagioclase is absent and no phosphate minerals were found. Geochemistry: Olivine Fa30.4-30.5, Fe/Mn=57-68; clinopyroxene Fs9.5-9.7Wo44.2-44.0, Fe/Mn=24-26, Cr2O3=0.75 wt%; orthopyroxene Fs24.5-24.9Wo2.1-2.2, Fe/Mn=35-37. Oxygen isotopes (R. Tanaka, OkaU): analyses of acid-washed subsamples by laser fluorination gave, respectively δ17O=2.881, 2.956; δ18O=5.619, 5.701; Δ17O=-0.076, 0.044 per mil. Classification: Achondrite (brachinite-like, ungrouped). Paired with NWA 5400, 5548, 6077, 6172, 6292, 6424, and 5363. Specimens: A total of 10.1 g from two separate stones and one polished thin section are on deposit at UWS. Mr. T. Webb holds the main masses. | ||||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1422: |
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Plots: | O isotopes: | ||||||||||||||||||||||||||||||
Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address) TWebb: No contact information provided., United States (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |