All Articles
The Search for Specimen (Pocket) Gold in the California Mother Lode
October 1999 by Dwight Juras, PhD
Any good miner can drift along a vein to find concentrations of gold if it is there, using good eyes and panning.
Our Readers Say
In response to "Fake Assays and Assayers", ICMJ September 2000...
Strategic Metals—Part II
There are literally thousands of abandoned wasterock and ore dumps that dot the United States that could hold many tones of strategic metals.
Ask the Experts
Can I treat a sample with muriatic acid?
USGS Reports Increase of Imported Minerals
Since 1993, US reliance on imports of raw and processed materials of mineral origin has increased more than seven fold.
Legislative and Regulatory Update
• Idaho continues toward elimination of EPA suction dredging regulations
• EPA makes preemptive strike against Alaska mine
• Proposed Mines Act permit fees
Gold Deposits in Skarn
Skarn consists of coarse-grained calcium, magnesium, iron, and aluminum silicates formed by hydrothermal solutions, which replace limestone or dolomite near the contact with an igneous intrusion. The contact metamorphism is usually caused by an intrusion such as quartz monzonite, granodiorite, or similar rock type, which may or may not be mineralized.
How PGMs Affect Assay Beads
Most fire assayers are trained to observe the cupelled beads very carefully, noting any discoloring or surface roughness that might indicate that one or more of the platinum group metals (PGMs) are present. The “clues and tests” I have included in this article stem from several sources, including my 35 years of experience performing torch assays...
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The Bawl Mill
• Our Readers Say
• The Economy, The Environment and Equity
• Carrizozo Lava Older Than Once Thought
• Montana Mining Association Raising Cash
• GATA Releases Open Letter to the Press
• WANTED: Mining Poets, Singers & Storytellers
• BLM Proposed Rule Making Affects Mining Claims
• Company Notes
• Mining Battle Case Under Advisement
• Sutro Tunnel a Big Draw
• Picks & Pans: Prospecting for Lode Gold
• Gemstones
• Dry Lakes in Nevada
• A Hairsbreadth from Death
• Special Suction Dredge Permits in Jeopardy
• Cartwrights Celebrate 40 Years in Nevada
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
• Looking Back
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