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Is Zinc Mining Surface Or Underground

1gr silver mining ltd otcqbgrslf has revealed new drill results from its plomosas project in mexico on tuesday that showed near-surface silver and gold mineralization on the property.. highlights of the drill results included 716 grams per ton gt silver equivalent ageq over 6.8 metres 191 gt silver 1.9 gt gold 7.1 lead and 3.4 zinc as well as 1687 gt ageq over 0.4 metres.

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