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Northwest Africa 2738 | |||||||||||||||||
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Basic information | Name: Northwest Africa 2738 This is an OFFICIAL meteorite name. Abbreviation: NWA 2738 Observed fall: No Year found: 2002 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||
Classification history: |
This is 1 of 453 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||
Writeup![]() |
Writeup from MB 89:
Northwest Africa 2738 Algeria Found 2002- 2003 Achondrite (howardite) One single stone of 370 g mostly covered with fresh fusion crust was found in winter 2002/2003 by an anonymous finder in Western Sahara. Classification and mineralogy (V.Moggi-Cecchi; G.Pratesi): polymict breccia with cumulate eucrite and diogenite fragments, not exceeding 10% of the total surface. Orthopyroxene fragments are commonly found set into a clastic matrix. Other types of fragments include large blocky plagioclase (An89.58Ab9.95Or0.47), augite exsolution lamellae (Fs27.52En28.84Wo43.64) and low-Ca pyroxene (Fs59.84En35.27Wo4.89) clasts; minor phases are sulfides and Fe-Ni metal. Oxygen isotope data (δ17O=+1.754 ‰ δ18O=+3.731‰; Δ17O=-0.186‰ - I.Franchi, R.Greenwood, OU) point to an interpretation as HED even if the Δ17O value is slightly more positive than the mass fractionation line for HEDs, probably due to terrestrial contamination. The degree of shock is low as well as weathering. Specimens: Main mass with anonymous finder; type specimen 30 g plus one polished thin section MSP. | ||||||||||||||||
Data from: MB89 Table 7 Line 362: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |