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Northwest Africa 2724 | |||||||||||||||||
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Basic information | Name: Northwest Africa 2724 This is an OFFICIAL meteorite name. Abbreviation: NWA 2724 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||
Comments: | Approved 3 Feb 2006 | ||||||||||||||||
Writeup![]() |
Writeup from MB 90:
Northwest Africa 2724 Northwest Africa Find: 2004 Achondrite (eucrite, polymict) History: A 3804 g crusted complete stone was purchased in Erfoud, Morocco, in 2004. Petrography: (J. Wittke and T. Bunch, NAU) The specimen mostly consists of cumulate basalt clasts that range from coarse-grained (~2 mm) to very fine-grained (~0.1 mm) with less than 5 vol% of subophitic basalts observed. Cumulate basaltic clasts are unusually low in ilmenite, chromite, and metal compared with other cumulate eucrites. Composition: Despite the large range in grain size, pyroxene compositions show a rather narrow range: low-Ca pyroxenes (Fs59.1–62Wo3.2–3.8), pigeonite (Fs46.5–51Wo12.4–16.6), Ca-rich pyroxenes (Fs40–2.1Wo30.5–40.5), plagioclase (An89.4–92.7). Classification: Achondrite (eucrite, polymict); low shock, minimal weathering. Specimens: A 34 g type specimen is on deposit at NAU. E. Thompson holds the main mass. | ||||||||||||||||
Data from: MB90 Table 2 Line 66: |
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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) Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Photos: |
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |