Last year, the country consolidated its position as a relevant player in the lithium market, thanks to a US$1.8bn project portfolio.
Mark Bristow said the studies on the Norte Abierto copper and gold joint venture project were advancing, while the Alturas project was making good progress.
Argonaut Gold reports financing and operating results
The 2.7bn reais (US$727mn) expected to be invested in this sector this year will be an increase compared to 2018, but is a long way the sizable investments made in 2010-14, industry association Abimaq said.
BHP posted a lower underlying attributable profit due to lower copper earnings, higher costs at Escondida in Chile and production disruptions at several mines.
Companies operating in Chile and Mexico gave updates on their drilling campaigns.
The EU restrictions, issued on February 1, affected seven types of steel that Brazil exports to the European trade bloc.