|Basic information||Name: Sapopema|
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2010
Mass: 12 kg
This is 1 of 77 approved meteorites (plus 1 unapproved name) classified as Iron, IVA. [show all]
Search for other: Iron meteorites, IVA irons, and Metal-rich meteorites
|Comments:||Approved 17 Oct 2014|
Writeup from MB 103:
Sapopema 23°52’32"S, 50°33’12"W
Classification: Iron meteorite (IVA)
History: The iron was found in a eucalyptus plantation by a teenager and his father. As the teenager collected rocks and minerals, the meteorite caught his attention for being very heavy. His cousin suspected that it could be a meteorite because she had watched a Brazilian TV program which discussed how to recognize meteorites.
Physical characteristics: A semi-regular weathered mass of about 20 × 15 × 12 cm, weighing about 13 kg.
Petrography: (M.E. Zucolotto, MNRJ) The etched sections exhibit a fine Widmanstätten structure of straight, long (~10-20 mm) kamacite lamellae with a width of (0.30±0.05 mm). Taenite and plessite cover about 40% by area.
Geochemistry: (J.T. Wasson, UCLA) INAA: 7.96% Ni; 0.39% Co; 1.95 ppm Ga; 2.34 ppm Ir; 1.047 ppm Au. Composition of Major phases (I.P. Ludka, IGEO-UFRJ) WDS/EPMA: kamacite (Ni=8.3±0.4; Co=0.54; N=20), taenite (Ni=29.4±1.4; Co=0.18; N=16), all wt%.
Classification: This IVA iron is compositionally unresolvable from two other Brazilian IVA irons, Para de Minas and Cratheus (1931). The discovery location appears to be well documented, and is far from Para de Minas and Cratheus (J. Wasson UCLA).
Specimens: Main mass with finder, 32 g MNRJ.
MNRJ: Museu Nacional, Quinta da Boa Vista, Rio de Janeiro, CEP 20940-040, Brazil (institutional address; updated 26 Dec 2011)
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
IGEO-UFRJ: Instituto de Geociências, Universidade Federal do Rio de Janeiro, Brazil (institutional address; updated 17 Oct 2014)
|References:||Published in Meteoritical Bulletin, no. 103, in preparation (2014)|
This is 1 of 4 approved meteorites from Parana, Brazil (plus 1 unapproved name) (plus 1 impact crater)
This is 1 of 71 approved meteorites from Brazil (plus 6 unapproved names) (plus 6 impact craters)
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