How To
Ask The Experts
May 2016 by Chris Ralph
• How small should I crush my hard rock ore?
Using Vegetation and Soil Conditions as Prospecting Aids
Wouldn’t it be great if you could know if there is gold in the ground without setting foot on the ground? Well you can, to a certain extent, if you can recognize mined ground from unmined.
Hard Rock Milling: A Matter of Scale
Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
Twenty-Five Gold Indicators You Should Know
I frequently get asked, "What should I look for when I am out prospecting that will tell me there are good amounts of gold present in the ground?"
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.
Route Planning Using GPS
My intention was to end this discussion with waypoints and routes, then I found USGS maps of the Plainfield Quadrangle.
Exploring Placers with Auger Drills
Augers can be used effectively for placer exploration with certain limitations.
Making Adjustments to Catch Fine Gold
This fine gold that is so common is probably the most notorious for eluding our riffles and mattings.
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