|Basic information||Name: Cruz Alta|
This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2008
Mass: 48 kg
This is 1 of 127 approved meteorites classified as Iron, IIAB. [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
|Comments:||Approved 17 Oct 2014|
Writeup from MB 103:
Cruz Alta 28°33’43"S, 53°37’4"W
Rio Grande do Sul, Brazil
Classification: Iron meteorite (IIAB)
History: A farmer who was removing stones exposed on a plowed field found that one was much heavier than the others. The finder sent samples to Andre Moutinho who did preliminary tests and then sent to MNRJ for further analysis and classification.
Physical characteristics: A flatted elipsoidal mass weighing 48 kg and measuring approximately 30 × 20 × 35 cm.
Petrography: Hexaedrite, showing the usual irregular patches of clear and frosty kamacite, troilite, and schreibersite.
Geochemistry: (J.T. Wasson, UCLA) INAA: 5.77% Ni; 0.45% Co; 59.1 ppm Ga; 211 ppm Ge; 16.2 ppm Ir; 0.546 ppm Au.
Classification: This IIAB has no close relatives in South America; the only similar IIAB irons are Coahuila (16.1 μg/g Ir) and Yarroweyah (16.0 μg/g Ir). All other Ir values differ by >10% relative (J. Wasson UCLA).
Specimens: Main mass with finder, 50 g Andre Moutinho, 25 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)
|References:||Published in Meteoritical Bulletin, no. 103, in preparation (2014)|
This is 1 of 8 approved meteorites from Rio Grande do Sul, Brazil (plus 1 unapproved name)
This is 1 of 71 approved meteorites from Brazil (plus 6 unapproved names) (plus 6 impact craters)
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