Galena with Chalcopyrite, Dolomite

specimen number:
2063266

location:
Brushy Creek Mine, Viburnum Trend, Reynolds Co., Missouri, USA

description:
One side of this breccia matrix is covered with semi lustrous cube octahedral crystals of galena measuring to 1.0 cm in size. The opposite side is coated with sparkling colorless small crystals of dolomite and golden crystals of chalcopyrite. In good condition all around. Collected by Brian Huntsman in August, 1996. The specimen comes with a previous label from the collection of Ray DeMark.

The Brushy Creek Mine, brought into full operation by St. Joe Minerals in November 1973 within Reynolds County, Missouri, is a key industrial underground facility situated in the central part of the world-class Viburnum Trend. Geologically, the deposit belongs to the Mississippi Valley-type family, featuring sulfide mineralization hosted chiefly within the Cambrian Bonneterre Dolomite and overlying buried Proterozoic paleotopographic basement knobs. The mine is celebrated both for its large-scale commercial extraction of lead, zinc, and copper, and for producing exceptional mineral specimens—particularly scalenohedral calcites and iridescent marcasites—recovered from deep underground watercourse cavities.

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