Exploring Placers with Auger Drills

June 2014 by Jim Halloran

Ask the Experts

August 2014
Centrifugal bowls versus jigs

Proper Spacing of Placer Sample Sites

September 2013
The zone of influence of each sample must be carefully considered when deciding how far sample sites should be spaced from each other.

Ganes Creek After The Flood

October 2014
Doug told me that there had been a 100-year flood that took place in October of 2013 and it washed out part of the mile-long landing strip. It also washed a large, wide gully down below and above the camp.

The Smell of Gold -- Part II

July 2015
While mapping, I also found rock chips in the soil that were characteristic of the same wall rock alteration that occurs adjacent to the known lodes in the greenstone belt.

Moore Creek, Alaska—Then and Now

June 2015
The gold was very chunky and much of it had quartz attached. Even back then I knew that the gold was very close to its source.

The Basics of Crushing and Milling Operations

February 2011
In processing gold, silver and other valuable ores, the minerals containing the values, such as metallic gold, silver-bearing sulfides or other minerals, must be freed from the surrounding host rock before those valuable minerals can be captured.

Moving The Big Rocks

October 2016
The anticipation of finding out if the system of snatch blocks, shackles, chokers, anchor points, and the strap binding the massive slab of rock in the bottom of the river would even budge an inch was weighing on me. 

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