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Northwest Africa 5234 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 5234 This is an OFFICIAL meteorite name. Abbreviation: NWA 5234 Observed fall: No Year found: 2008 Country: Algeria Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 275 approved meteorites classified as Eucrite-mmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 1 Apr 2012 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 100:
Northwest Africa 5234 (NWA 5234) (Northwest Africa), Algeria Purchased: Feb 2008 Classification: HED achondrite (Eucrite, monomict) History: Found in Algeria and purchased in February 2008 by Adam Hupé from a Moroccan dealer at the Tucson Gem and Mineral Show. Physical characteristics: A single, very fresh, 399 g stone, partially covered with fusion crust. The interior is crosscut by numerous thin, dark shock veins. Petrography: (A. Irving and S. Kuehner, UWS) Monomict basaltic eucrite breccia composed of exsolved pigeonite, discrete grains of orthopyroxene and augite, calcic plagioclase, silica polymorph (some intergrown with plagioclase and augite), Ti-bearing chromite, troilite and rare zircon. The veins consist of glass plus very fine clasts and microlites of mostly plagioclase and pyroxene. Geochemistry: Orthopyroxene host (Fs61.4-61.5Wo2.0-1.9, Fe/Mn=30.4), plagioclase (An89.4Or0.6). Oxygen Isotopes (D. Rumble, CIW): analyses of acid-washed whole sample material by laser fluorination gave the following results: δ18O = 3.694; δ17O = 1.727; Δ17O = -0.216 per mil. Classification: Achondrite (eucrite, monomict). This specimen is unusual because of the abundance of shock melt veins. Specimens: 20.1 g and one polished slice are on deposit at UWS. The main mass is held by AHupé. | ||||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1209: |
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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) AHupé: Adam C. Hupé, 2807 China Cove, Laughlin, NV 89029, United States; Website (private address; updated 29 Jun 2013) CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (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 the only approved meteorite from (Northwest Africa), Algeria This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) |