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Melman on Gold & Silver

Never have I regretted the deadlines we must work with at this publication as I do this month, for events of tremendous significance are likely to occur between the time this column must be prepared and the time our readers will receive it.

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The Boludo Placers, Sonora


The Boludo placers described here include gravels that have been listed under many different names, including Altar, Golden Triangle, Llanos del Oro, San Francisco, and Trincheras, among others. The placers are on desert flats at the northwest end of Sierra Santa Rosa, about 2,600 feet above sea level. It is in a region of northwest-trending mountain ranges separated by broad desert valleys.

How to Interpret Assay Values


This assay system of ounces per ton sounds simple enough, but the use of the metric system and the additional measuring terms of “grams per ton” and “parts per million” (ppm) has created some misunderstanding of ore value.

A Word from the Editor


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I wanted to become part of the romance of Colorado—to become part of the romance of mining in those majestic mountains. The path ahead of me was much rougher than I anticipated.

Legislative and Regulatory Update


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Ask The Experts: How do I identify gold in hard rock that may be mixed with other metals?


Q: Aside from the softness scratch test and other methods of identification, what feedback would you have on identifying gold in hard rock that may be mixed with other metals that affect its color?

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The Bawl Mill   • Impact of Habitat Designations Grossly Underestimated   • Manslaughter Charges Dropped Against Sixteen to One Mine   • A Unique Prospecting Method   • Over the Divide   • Cripple Creek, Colorado   • Picks & Pans: Virginia Prospecting   • PLP Gets the Key!   • Mariposa, California   • The Ocampo District, Chihuahua   • The Collaboration   • Mud Creek Placer Mine   • Mining Stock Quotes and Mineral & Metal Prices   • Looking Back

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