Mangabeira deposit, Monte Alegre de Goiás, Goiás, Central-West Region, Brazil

Sn-In deposit in topaz granites.

Pink porphyritic/equigranular biotite granite.
Greisenized zones encompassing a L-siderophyllite granite, a topaz-albite granite, a quartz-topaz rock, a metasomatized granite and Sn-mineralized greisens.

References:
- M. Abrahao Moura et al. (2000): Revista Brasileira de Geociensas, 30(2), 270-273.
- Márcia Abrahão Moura, Nilson Francisquini Botelho and Fábio Carvalho de Mendonça (2007): The indium-rich sulfides and rare arsenates of the Sn–In-mineralized Mangabeira A-type granite, Central Brazil. Canadian Mineralogist 45, 485-496.

- http://www.sbgeo.org.br/rgb/vol30_down/3002/3002270.pdf