3 Technologies in Exploration, Mining, and Processing .
Hydraulic mining is used for placer deposits of gold, tin, and other metals. Surface ... In situ leaching technologies are based on geology, geochemistry, solution.
Gold Mining, Past and Present: What Does the Future Hold?
Feb 3, 2015 . By 1853, hydraulic mining emerged, largely replacing independent . The two primary types of gold deposits are lode (primary) deposits and placer (secondary) . Another theory suggests that gold bearing solutions may be.Get Price