All Articles
The Boludo Placers, Sonora
November 2004 by Edgar B. Heylmun, PhD
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.Legislative and Regulatory Update
• Funds eliminated for federal land acquisitions
• ANWR leasing
• GAO scolds Fish & Wildlife
• Red Rock wilderness proposed again
• BLM websites still down
• Karuk lawsuit update
Melman on Gold & Silver
Unfortunately, death seemed to occupy a major role in recent major headlines—and it came in several different directions.
Ask The Experts
Is this a valid claim?
Gold Prospecting for Better or Worse: Gold Is Where You Find It
Saturday came and it looked to have the makings of a dreary, misty day. Undaunted, I loaded my truck with my sluice, buckets and gear, and headed for the claim.
Gold and Rare Earth Elements in New Mexico
We import nearly all of our REEs from China, so it’s critical that we find and continue to develop domestic resources of these elements.
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.
Subscription Required:
The Bawl Mill
• Editorial: Montana's Controversial Rock Creek Mine
• First Load of Concentrate Leaves Reopened Ruth Mine
• Uranium Industry Enjoys Rebound as Prices Nearly Triple
• BLM Warning About Purchase of Mining Claims on the Internet
• Determining the Amount of Gold in a Quartz Specimen
• Placer PGMs in Coon Creek, California
• Getting Your Float Circuit Layout Right
• Pick Up Austria's New Coin—If You Can Lift It
• New Prospecting Guides Available Online
• Police Extend Detention of Newmont Executives
• Picks & Pans—Drywashing and Detecting in Southern California
• Over The Divide—Merwin (Merv) H. Hemp
• The Golden Highway—Placer County
• Northwest Miners Rally a Success
• Mine Threat Just a Stunt to Criticize Land Laws
• MINExpo 2004 Convention Report
• Looking Back
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
