Chile details plans to reform env'l assessment process
'Argentina is difficult because it's a federal nation'
Security improving at Pan American's Mexican mine
Junior corporate roundup: Blue Sky, Megastar, Millennial Lithium, Santana

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Costs shift lower among silver miners in LatAm
US begins restricting imports of Brazilian steel, aluminum
Brazil royalty payments up sharply
Brazil's May iron ore exports on the slide
Junior exploration roundup: Sierra Metals, Argentina Lithium, Emerita Resources
Silver Bull plans US$100mn JV to progress Sierra Mojada