The Basics of Geophysical Exploration
February 2012 by Chris RalphIn developing a mineral property or mining claims, one of the first goals is to identify and quantify valuable deposits. The classic method of doing this is by drilling holes into the ground to sample what is below the surface. The problem is that one or two holes usually are not going to tell you a whole lot...
Improper sampling techniques lead to more avoidable heartache than almost anything else in micro mining.
Designing my own dredge...
This explains the large difference in particle sizes between placers and hydrothermal lode deposits, but also means that while the mining may be similar in some cases, the sampling and recovery techniques are usually quite different.
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.
Because quartz and gold may be deposited together across a considerable range of temperatures, not all quartz veins are the same, and there are several different types of gold-quartz deposits.
There are three basic power sources for rock drills—electricity, gasoline and compressed air. Before we go into big pneumatic drills, we’ll start with a quick rundown of each.
When you approach a location, even if you've been there before, you should consider all the factors and conditions present at the site. This includes both natural and man-made factors.
The Bawl Mill • Ask the Experts - ...Worth further investigation? • Ask the Experts - Processing sulfide ore without mercury or cyanide. • Regarding "Good Assays and Bad" • New "Employment" Category • 4 Keys to Successful Nugget Hunting • A High Price to Pay • Eolian Placer Gold • All the Gold Ever Mined... • Targeted for a Tax Audit • Feds Order Closure of Idaho Mine • Trying Out the New Highbanker • A Gold Mine on a Washington Beach? • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices