Basic Geology for the Independent Miner—Part III Understanding Plate Tectonics, Volcanism and Mountain Building
March 2006 by Chris RalphThe formation of gold, silver and many other types of deposits depends on a natural segregation of the elements from the earth, so that gold or silver (and other minerals) becomes enriched enough to form a valuable ore.
Met by jeers and cheers from more than 1,000 people, US Senator Diane Feinstein (D-CA) made another pitch to create three new national monuments in the deserts of southern California recently.
In some places, semi-continuous sections of riverbed can easily be linked in many places to identify the path of the ancient rivers.
I have seen many samples taken originally with an eye toward getting the highest grades possible, but later someone claims that those results represent an average grade of the whole gravel deposit.
In August 1862, prospectors from Walla Walla, Washington, led by George Grimes, discovered gold near the present townsite of Pioneer City. Grimes was killed by Indians shortly after the discovery. The remaining argonauts retreated to Walla Walla. On October 10, 1862, 52 men returned to Grimes Creek. They built a fort and several cabins before continuing their quest for gold.
It’s accepted knowledge that wet methods will recover more fine gold than dry methods and processing the gravel as a whole will get more gold than only using a metal detector. The question is how much more?
The Bawl Mill • A Word from the Editor • The Fortymile Goldfields • The Rocks that Burn—Part II Is Oil Shale the Answer? • Record Interest at Recent Mining Conventions • Common Operations—Small-Scale Mining and Sharing the "Take" • Trout Thriving In Treated Mine Water • Company Notes • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices