|Northwest Africa 4587|
|Basic information||Name: Northwest Africa 4587|
This is an OFFICIAL meteorite name.
Abbreviation: NWA 4587
Observed fall: No
Year found: 2006
Mass: 530 g
This is 1 of 74 approved meteorites classified as Achondrite-ung. [show all]
Search for other: Achondrites, Ungrouped achondrites
|Comments:||Approved 24 Jul 2007|
Writeup from MB 92:
Northwest Africa 4587
Find: September 2006
History: G. Hupé purchased the rock in September 2006 in Erfoud, Morocco.
Physical characteristics: The meteorite comprises a single, dense stone (530 g) without fusion crust. The main constituent (pyroxene) is a distinctive deep brown color and several large opaque grains are visible.
Petrography: (A. Irving and S. Kuehner, UWS) Granular texture with large pyroxene grains (pigeonite with numerous fine, parallel exsolution lamellae of clinopyroxene) and interstitial polycrystalline plagioclase (with rims of silica against pyroxene). Accessory minerals are skeletal ilmenite, merrillite, Ni-bearing pyrrhotite and rare kamacite. One large oikocryst of ilmenite + Ti-chromite contains numerous chadacrysts of plagioclase, and has narrow rims of fayalitic olivine adjacent to surrounding pyroxene.
Mineral compositions: Pyroxene consists of host pigeonite (Fs63.4Wo6.9 FeO/MnO = 67.6, TiO2 = 0.49 wt%) and lamellae of clinopyroxene (Fs35.4Wo38.9, FeO/MnO = 69.4, TiO2 = 0.90 wt%); plagioclase (An85); olivine rim adjacent to ilmenite (Fa81.9, FeO/MnO = 112).
Specimens: A total of 20 g of sample is on deposit at UWS. GHupé holds the main mass.
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address)
|References:||Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)|
This is 1 of 728 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)
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