Found this report and it says "This study is part of a project under development by the BrazilianGeological Survey called ‘’ARIM - Southeast of Amazonas State’’. Theauthors would like to thank BBX Minerals for the field work supportprovided, and for allowing access to their drill cores.
https://www.researchgate.net/publication/325630393_Regional_reconnaissance_of_primary_gold_occurrences_at_Juma_Gold_DIstrict_SE_of_Amazonas_State_southern_Amazonian_craton_Brazil