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| Northwest Africa 4301 | |||||||||||||||||||||
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| Basic information | Name: Northwest Africa 4301 This is an OFFICIAL meteorite name. Abbreviation: NWA 4301 Observed fall: No Year found: 2006 Country: (Northwest Africa) Mass:  685 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 5 approved meteorites classified as Enst achon-ung. [show all] Search for other: Achondrites, Enstatite achondrites, Enstatite-rich meteorites, and Ungrouped achondrites | ||||||||||||||||||||
| Comments: | Approved 11 Jun 2006 | ||||||||||||||||||||
| Writeup |
Writeup from MB 91:
Northwest Africa 4301 Mauritania or Algeria Find: April 2006 Enstatite achondrite (ungrouped) History: Purchased in April 2006 by G. Hupé from a Moroccan dealer in Rabat. Physical characteristics: A single 685 g stone with some reddish external weathering. Petrography: (A. Irving and S. Kuehner, UWS) Subequigranular igneous cumulate texture with relatively coarse-grained (0.2–0.8 mm) silicate, metal, and sulfide grains. Composed mainly of polysynthetically twinned pure enstatite = 70 vol% and kamacite = 15 vol%, with subordinate interstitial plagioclase = 10 vol% and troilite = 5 vol%. Micrometer-size blades and blebs of kamacite and rare daubreelite also occur as inclusions within enstatite. Mineral composition: Plagioclase (An30.7–37.6Or1.8–1.3). Classification: Enstatite achondrite (ungrouped). Terrestrial weathering has produced some limonite along grain boundaries. This specimen is very similar in texture and mineral compositions to Zakłodzie. Type specimen: A total of 22.9 g, one polished thin section and one polished mount, are on deposit at UWS. G. Hupé holds the main mass. | ||||||||||||||||||||
| Data from: MB91 Table 2 Line 282: |
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| 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) |
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| References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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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) | ||||||||||||||||||||