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Santo Antônio do Descoberto
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:help 52.15 kg
Classification
  history:
Recommended:  Iron, IIAB    [explanation]

This is 1 of 128 approved meteorites classified as Iron, IIAB.   [show all]
Search for other: IIAB irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 23 Nov 2014
Writeuphelp
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:
State/Prov/County:Goias
Origin or pseudonym:field
Date:2011 Dec 28
Latitude:16°6'38"S
Longitude:48°18'58"W
Mass (g):52150
Pieces:1
Class:Iron, IIAB
Weathering grade:low
Classifier:J.T. Wasson, UCLA
Type spec mass (g):52
Type spec location:MNRJ
Main mass:finder
Finder:José Melo
Comments:Submitted by Maria Elizabeth Zucolotto
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, in preparation (2014)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ALESSANDRO TAKEDA   
Andre Moutinho      
John A. Shea   
José Carlos de Medeiros Júnior   
Rodrigo Guerra   
Samuel Wanderley   
Geography:

Brazil
Coordinates:
     Recommended::   (16° 6' 38"S, 48° 18' 58"W)

Statistics:
     This is 1 of 7 approved meteorites from Goias, Brazil
     This is 1 of 71 approved meteorites from Brazil (plus 6 unapproved names) (plus 6 impact craters)
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