Silica Deposition

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Silica Deposition

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Silica Deposition:
The formation of silica minerals due to silica precipitating out of solution. Geothermal fluids are often silica rich and as the temperature of the fluids cool when they reach the surface silica precipitates out of the solution.
Other definitions:Wikipedia Reegle


Silica deposition is the white buildup on the rocks. Silica deposition often causes scaling in geothermal pipelines and clogs up pore space in formations causing problems with reinjection, or in the case of the Blue Lagoon in Iceland, silica deposition prevented water from seeping into the ground causing the formation of beautiful pools on the surface. Photo taken by Darren Atkins at the Blue Lagoon, Iceland.


Includes silica sinter and chalcedony deposits typically encountered around modern neutral chloride hot spring discharges.

Examples

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CSV
Geothermal
Resource
Area
Geothermal
Region
Control
Structure
Host
Rock
Age
Host
Rock
Lithology
Mean
Capacity
Mean
Reservoir
Temp
Fang Geothermal Area Thailand Geothermal Region Major Normal Fault Granite 0.3 MW300 kW
300,000 W
300,000,000 mW
3.0e-4 GW
3.0e-7 TW
418.15 K145 °C
293 °F
752.67 °R
Roosevelt Hot Springs Geothermal Area Northern Basin and Range Geothermal Region 1- Tertiary; 2- Precambrian 1- granite; 2- metamorphic 34 MW34,000 kW
34,000,000 W
34,000,000,000 mW
0.034 GW
3.4e-5 TW
533.15 K260 °C
500 °F
959.67 °R
Salt Wells Geothermal Area Northwest Basin and Range Geothermal Region 23.6 MW23,600 kW
23,600,000 W
23,600,000,000 mW
0.0236 GW
2.36e-5 TW
466.15 K193 °C
379.4 °F
839.07 °R