The Boludo Placers, Sonora
November 2004 by Edgar B. Heylmun, PhDThe 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 locate diamonds: This article focuses on the principal host rock for diamond and describes some gemstones (and kimberlitic indicator minerals) typically found with diamond.
Mergers and acquisitions continue at a record pace in 2006 as companies attempt to replace dwindling reserves. Mining companies find that it is more expedient to purchase additional reserves by acquisition than to spend time and money for exploration and startup, even more so when their stock prices are much higher as compared to recent years.
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Bob “Neverquit” Abendschein’s article on his “Special Rock” in the December 2006 issue was short and to the point. As Neverquit and I are old friends, I sent him e mail:
The placer deposits of Utah occur in two distinct types of environments. These are 1) placers found adjacent to, and derived from, gold, silver and base-metal deposits; and 2) placers found in major rivers and derived from unknown, distant sources.
In today’s economy, the question is often not whether to fix or replace equipment, fixtures, business assets or even the building housing the mining operation or mining-related business, it is which path is affordable.
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