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Northwest Africa 3211 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 3211 This is an OFFICIAL meteorite name. Abbreviation: NWA 3211 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 8 Sep 2008 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 94:
Northwest Africa 3211 Northwest Africa Find: 2005 Achondrite (eucrite) History: A single stone of 89.2 g was purchased 2005 in Erfoud by M. Chinellato. Physical characteristics: The sample has no fusion crust. Petrography: (V. Moggi Cecchi, G. Pratesi, MSP) A polymict breccia consisting of basaltic and mineral clasts set into a fine-grained matrix of exsolved pyroxene, clinopyroxene and plagioclase. The large clasts are predominantly plagioclase and exsolved pyroxene, with minor clinopyroxene. Minor phases include silica, ilmenite and Al-Ti-chromite. Exsolution lamellae in pyroxene are generally very fine (1–2 μm width). Geochemistry: Plagioclase An86.6; Pyroxene ranges Fs43.9–55.6, En36.2–54.2, Wo2.0–21.5. Oxygen isotopes (I. Franchi, R. Greenwood, OU) δ17O = 1.71‰, δ18O = 3.85‰, Δ17O = -0.25‰. Classification: Achondrite (eucrite) with moderate degree of shock and low degree of weathering. Possibly paired with NWA 3212. Type specimens: A total of 17.9 g and one thin section are on deposit at MSP, Prato. M. Chinellato holds the main mass. | ||||||||||||||||||||||||
Data from: MB94 Table 2 Line 4: |
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Plots: | O isotopes: | ||||||||||||||||||||||||
Institutions and collections |
MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022) OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011) MChin: Matteo Chinellato, Via Triestina, 126/A-30030 Tessera, Venezia, Italy; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Geography: |
Statistics: This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |