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Epithermal Gold/Silver Deposits Lecture # 07 Economic Geology
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The term epithermal was used by Lindgren in 1913 to refer to those hydrothermal ore deposits that formed in a relatively near surface environment.
Today we know this is from about 50 meters down to 1,500 meters below the surface with temperatures between 100 and 400 degree centigrade and low pressures.
Surface expressions of these near surface deposits are hot springs.
Most geologists think of epithermal deposits as being mainly continental and associated with subaerial geothermal systems, however volcanogenic massive sulfide and sedimentary exhalative deposits are certainly in the epithermal group.
#geo girl
#geology
#education
#landscape
#glacier
#geomorphology
#science
#sciencefacts
#gold
Today we know this is from about 50 meters down to 1,500 meters below the surface with temperatures between 100 and 400 degree centigrade and low pressures.
Surface expressions of these near surface deposits are hot springs.
Most geologists think of epithermal deposits as being mainly continental and associated with subaerial geothermal systems, however volcanogenic massive sulfide and sedimentary exhalative deposits are certainly in the epithermal group.
#geo girl
#geology
#education
#landscape
#glacier
#geomorphology
#science
#sciencefacts
#gold
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