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Prospecting Old Tertiary Channels

The potential exists for small-scale placer mining in these pits using a trommel and sluice box or other similar types of equipment.

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Looking Back


Excerpts from California Mining Journal, our original title, published 50 years ago this month.

Looking Back


Excerpts from CMJ published 50 years ago this month.

Ask the Experts


Q: Where is the best place to prospect for gold in Minnesota?

Ask The Experts


Options for affordable crushers for small mining operations

Detecting for Possible Mid-Range Eluvial Gold


Actually, this mid-range gold zone can exist in any eluvial placer field with a shallow zone where the ground “tightens up” below the loosely packed surface dirt to harder packed dirt. However, its presence depends upon several factors:

Mongolia Tax May Chase Off Investment


The gold and copper deposits at Oyu Tolgoi, or “Turquoise Hill,” are among the largest ever found and could give impoverished Mongolia its biggest boost since it abandoned communism 15 years ago—if the Mongolians can figure out how to profit from it.

Roll-Front Uranium Deposits


If the uranium industry stages a comeback, it will not likely be a mad rush like it was in the 1950s. Except for non-radioactive uranium, most surface and near-surface deposits have been found.

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