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| Santo Antônio do Descoberto | |||||||||||||||||||||||||||||||
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| Basic information | Name: Santo Antônio do Descoberto This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: No Year found: 2011 Country: Brazil Mass:  52.15 kg | ||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 150 approved meteorites classified as Iron, IIAB. [show all] Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites | ||||||||||||||||||||||||||||||
| Comments: | Approved 23 Nov 2014 | ||||||||||||||||||||||||||||||
| Writeup |
Writeup from MB 103:
Santo Antônio do Descoberto 16°6’38"S, 48°18’58"W Goias, Brazil Found: 2011 Dec 28 Classification: Iron meteorite (IIAB) History: A mass weighing 52.15 kg was found by some farm workers while they were leveling the soil. The meteorite was buried about 60 cm below the surface. Physical characteristics: A pear shape weathered mass of about 20 × 30 × 55 cm. Petrography: M.E. Zucolotto, MNRJ: Etched sections show a normal hexahedrite structure with some sets of Neumann lines and areas of bright and frosty kamacite. The rhabdite precipitates are small and very numerous on the frosty areas, but larger and idiomorphic on the bright sides. Also common are long plate-shaped rhabdites in directions probably related to the {221} planes of kamacite. Sulfides are common as irregular troilite, daubreelite and metal mosaic aggregates and nodules; in some places full shock melting has occurred, and troilite has dissolved partly into adjacent metal and invaded the kamacite matrix. Geochemistry: 5.76% Ni; 0.46% Co; 500 ppm Cr; 138 ppm Cu; 456 ppm Re; 4.61 As; 60.1 ppm Ga; 6.03 ppm Ir; 0.594 ppm Au (INAA, J.T. Wasson, UCLA). Classification: Iron, IIAB (J.T. Wasson, UCLA) Specimens: 125 g MNRJ | ||||||||||||||||||||||||||||||
| Data from: MB103 Table 0 Line 0: |
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| Institutions and collections |
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) |
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| References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography:
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Statistics: This is 1 of 8 approved meteorites from Goias, Brazil This is 1 of 87 approved meteorites from Brazil (plus 6 unapproved names) (plus 7 impact craters) | ||||||||||||||||||||||||||||||
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