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Northwest Africa 4496 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 4496 This is an OFFICIAL meteorite name. Abbreviation: NWA 4496 Observed fall: No Year found: 2006 Country: (Northwest Africa) Mass: 19 g | ||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||
Comments: | Approved 28 Mar 2007 | ||||||||||||||||||||||
Writeup |
Writeup from MB 91:
Northwest Africa 4496 Morocco Find: 2006 Achondrite (eucrite, cumulate) History: A stone was found by an individual while tending to a goatherd and purchased in Rissani in July 2006. Physical characteristics: A complete and elongated 19 g stone with fresh fusion crust. Petrography: (J. Wittke and T. Bunch, NAU ) Fine- to medium-grain-size, monomict cumulate eucrite with plastic flow features. Clusters of interpenetrating plagioclase crystals that display prominent albite twinning, enclose pyroxenes. Mineral compositions: Orthopyroxene (Fs59.7–61Wo3.8; FeO/ MnO = 31–33, n = 15), pigeonite (Fs52.1–55Wo6.9–11.2), ferroaugite (Fs47.8Wo27.2), plagioclase (An89–92), chromite (Cr/Cr+Al = 69). Classification: Achondrite, (eucrite, cumulate, monomict breccia); minimal shock and weathering. Type specimen: A total of 4.1 g and one thin section are on deposit at NAU. The main mass holder is anonymous. | ||||||||||||||||||||||
Data from: MB91 Table 2 Line 350: |
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Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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