Understanding Geologic Deposit Models
May 2008 by Chris RalphGeologists have long noted the similarities of certain types of mineral deposits all across the globe. Similar minerals, similar country rocks, and similar grades of mineralization may occur in several different parts of the world.
Goodnews Bay Platinum Mine, owned by Hanson Industries in Spokane, Washington, has resurrected a 60-year-old bucketline dredge to claw the steel-gray metal from the river drainages around Red Mountain on Cape Nushagak.
So, how much rain does it take to cause a major movement of gravels in a stream and redistribute the gold? The technical answer is enough water to move the bed load of the river.
There aren’t too many workable placer deposits of platinum in the world today. Most of the platinum found is in hardrock lodes, usually mixed in the gold, silver or copper outcrops.
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Some will doubt its value given the ultra-fine particle size… Some will become encouraged about not having to incur significant time and expense to break rock.
In the simplest sense, drills can be divided by their mode of action—percussion, rotary or a mixture of the two.
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The Bawl Mill • Ask the Experts—Why doesn't the 1872 Mining Law apply to all 50 states? • Ask The Experts—Where do I find information about getting paid for raw gold? • The Lost Silver Triangle of the Sierra Madre—Part II • Prospecting for Diamonds • Avino’s Durango Project • Success With A Detector • Horsetail Gold • The Makorakoza of Zimbabwe—Centuries of Prospecting in Gold-Hosting Dolerites • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices