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Dragline

A mineral concentration device that uses a catching net, or bucket tied to a long rope, to collect heavy minerals in moving current. Used for recovering placer minerals in creeks and rivers and usually for testing purposes

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Dyke

An intrusion of magmatic rock forming between fractures of earlier rock

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Ductile

A term used to describe minerals capable of bending and reshaping without breaking

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Dry placer

Non aqueous mineralized gravel deposit, usually an ancient channel, dry riverbeds or hillside

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Drill-indicated reserves

The assumption of an attainable average of mineralization by quantifying the mineralization found through results of well spaced representative drill samples

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Drill string

The assembly of a drill bit with a drill rod, alone or with more than 1 drill rods in succession

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Drill rig

A completed setup including a drill, drill string, mount, power, required accessories and housing