Hi,
Just found this.
Not sure what it means.
Could it be an exploration license ??
850.825 / 2005-XSTRATA BRASIL MINERAL EXPLORATION LTDA.- Assignee: AVANCO RESOURCES MINERAÇÃO LTDA.- CPF or CNPJ 09.075.146 / 0001-70- License nº 10.095 / 2016
Translated form this link...
https://www.jusbrasil.com.br/diarios/139716970/dou-secao-1-13-03-2017-pg-52[/BCOLOR]