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Northwest Africa 6105 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6105 This is an OFFICIAL meteorite name. Abbreviation: NWA 6105 Observed fall: No Year found: 2008 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 396 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 24 Apr 2012 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 100:
Northwest Africa 6105 (NWA 6105) (Northwest Africa) Purchased: 2008 May 18 Classification: HED achondrite (Eucrite, polymict) Petrography: Breccia consisting of clasts ranging in size from 1-5 mm within a matrix of pyroxene, plagioclase, opaque phases, phosphate, and in some glass. Textures indicative of shock metamorphism are common as are augite exsolution lamellae in host pigeonite. Minerals include pyroxene (low- and high-Ca), plagioclase, and silica with minor amounts of calcite, ilmenite, troilite, chromite, and Fe-Ni metal. Geochemistry: Pyroxene: Mg# = 38-57, low-Ca = Fs39.3-58.2Wo0.9-10.0, and high-Ca = Fs18.0-30.2Wo32.8-46.3. Plagioclase: An76-95. Oxygen isotopic compositions (R. Tanaka, OkaU, and D. Rumble, CIW, laser fluorination): duplicate analysis δ18O = 3.773, δ17O = 1.679, Δ17O = -0.308; and δ18O = 3.852, δ17O = 1.737, Δ17O = -0.291 (all per mil). Classification: Achondrite (eucrite, polymict) with shock metamorphism. Pyroxene Mn/Fe = 0.033 consistent with HEDs. Specimens: 12 g and 5 thin sections are on deposit at UTenn. L. A. Taylor holds the main mass. | ||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1291: |
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Plots: | O isotopes: | ||||||||||||||||||||||||
Institutions and collections |
UTenn: Planetary Geosciences Institute, Department of Earth and Planetary Sciences, University of Tennessee, 1412 Circle Drive, Knoxville, TN 37996-1410, United States (institutional address; updated 1 Nov 2011) CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address) OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional 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) |