California's Mother Lode Quartz Veins
May 2015 by Chris RalphThe actions of the hot, ore-bearing solutions are not limited only to the deposition of material within the walls of the fissures.
The most obvious benches are usually near the valley floor, but they can be thousands of feet above the valley floor. Since benches were made by streams, they can contain placer deposits.
When prospecting for lithium, after confirming for macro attributes through research and field work, including examination of surface geology, the main tool is an accurate lithium assay.
When I was a student in the College of Mines at the University of Utah, the Verde district was used as an exploration model for “submarine volcanogenic massive sulfide deposits.” So I looked forward to visiting this district and the town of Jerome in central Arizona in the spring of 2012.
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.
The other distinguishing feature of calcite has to do with its chemistry. Geologists sometimes take a small bottle of dilute hydrochloric acid out into the field with them because calcite reacts with acids to make a bubbly foam.
In September 1861, on a round-about prospecting journey homeward, five California gold miners discovered gold in the area now called Florence. While watering the horses, one of the men noticed a golden color on a piece of slate bedrock in the stream...
Only the richest ores could be worked and shipped off for processing at a profit. As a result, early mining in the southern part of the Humboldt Range was short-lived. In the 1880s, placers were discovered in Spring Valley and American Valley on the east side of the range...
The Bawl Mill • Ask The Experts • Ask The Experts • Key to Successful Prospecting: Confidence • What To Look For—And Look Out For—In A Placer Mineral Report • Additional Note on Bluff's Beach • Surface Indications Of Quartz Adularia Epithermal Deposits • Montana’s Rosetta Stone: Discovering Mines In The Treasure State • Perception of Mining vs. Reality • Partnering for Tax Savings • Over The Divide: Charles Lewis Garrett • Piggin' for Gold • Mining Stock Quotes and Mineral & Metal Prices • Melman on Gold & Silver