Dia Bras confirms discovery of a large disseminated silver zone at its Cusi property

TORONTO, ONTARIO--(Marketwire - Nov. 15, 2011) - Dia Bras Exploration Inc. (TSX VENTURE:DIB) (

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Complete transition from mantle plume to mantle exhumation on the Central Atlantic Guyana/Suriname margin

Dia Bras confirms discovery of a large disseminated silver zone at its Cusi property

polymetallic Gambusino Prospector

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EX-4.11

AbraSilver Resource Reports 258 Million Silver-Equivalent Ounces Contained in M&I Categories, Substantially Increasing Diablillos Mineral Resource Estimate - Junior Mining Network

polymetallic Gambusino Prospector

EX-4.1

PJX Resources' Copper-Gold-Silver Mineralization in Sullivan Mining District and DD Property Update - Junior Mining Network

Dundee Precious Metals Inc. Dundee Precious Metals Announces Significant Diamond Drilling Results at Tierras Coloradas, Ecuador; Results Include Drill Intercept of 17.3 metres at 46.09 g/t Au

Summa Silver Identifies Numerous High-Grade Zones

Sierra Metals defines high grade silver-gold mineralization at the La Sidra Zone and high grade copper at the Bolivar West Zone located at the Bolivar Mine, Mexico

Sierra Metals defines high grade silver-gold mineralization at the La Sidra Zone and high grade copper at the Bolivar West Zone located at the Bolivar Mine, Mexico