History & Geology
How Mesothermal/Orogenic Gold Deposits Form
August 2021 by Chris Ralph
These deposits are very widespread across the planet. In fact, they are so extensive that something around 75% of all the gold ever mined comes from these types of deposits (if one includes the placer deposits that also formed from them).
Gold Deposition and Gradients of Placer Streams—Part I
When placer miners from the gold rush era began experimenting with the slope of their sluices, they must have pondered the ideal slope for trapping gold in a creek bed too. Logic suggests the same is true for streams...
The Goldfield Mining District, Nevada—Part II
The majority of the gold produced in Goldfield has come from ores that are close enough to the surface to be oxidized by the air. This oxidized ore is normally a soft, shattered, earthy material usually stained yellow to brown by oxides of iron.
Gold Placers of Southern California
I grew up in Southern California, and found my first nugget there, so I know my way around. Because there is good gold there, I thought it might be helpful to take a look at the many placer gold opportunities found in the southern part of the state.
Understanding Rock Formations: Petrology for Prospectors
There are times when being able to recognize a type of rock can make you a much more successful prospector.
Flood Plain Gold Deposits—What Are They Really?
We just completed a trip to another river, and yes, there was definite movement and redistribution of gravels, and other prospectors have seen this as well.
The Silver, Gold and Gemstones of Candelaria, Nevada
The Candelaria area is of interest to prospectors not just for silver, gold and other metals, but also for the beautiful gemstones found there.
Surface Indications Of Quartz Adularia Epithermal Deposits
I am going to keep to the basics of surface indications and visual clues in the rocks and minerals themselves that help me find gold-bearing veins in this classification of deposits.
The Bawl Mill • Ask The Experts - Are pulse induction detectors the right tech for gold? • Ask The Experts - Why can’t I find gold with my detector? • Ask The Experts - Are two rock crushing machines (jaw crusher and chain crusher) necessary? • Ask The Experts - Why am I finding only coarse gold, not fines in this area? • Ask The Experts - Is the amount of gold reserves claimed by mining companies real or just hype? • How To Identify Minerals • Chasing Hard Rock Gold As A Placer Deposit • Gold Prospecting for Better or Worse: Bumbling Through A Gold Bonanza • My Explosive Introduction to Gold Mining • Georgetown CA: A Historically Rich Mother Lode Treasure • Reminder: Annual Claim Filings and Fees Due • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices