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| Titel |
Scaling Tendency of Geothermal Waters Armutlu Peninsula, Northwestern Turkey |
| VerfasserIn |
Can Ertekin |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250111833
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| Publikation (Nr.) |
 EGU/EGU2015-11976.pdf |
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| Zusammenfassung |
| Prediction of scaling tendencies from geothermal waters is important for taking necessary
precautions to prevent or control the scale formation. This study contains scaling tendency of
geothermal outlets occurring through Armutlu Peninsula in Northwestern Turkey. The E-W
trending region stretches into the Marmara Sea (ca. 117 km E-W by 45 km N-S) and is
bounded to the north and the south by North Anatolian Fault Zone (NAFZ). The two
branches of NAFZ traversing the peninsula control not only active seismicity but also
geothermal discharges of the region. Widespread basement rocks across the peninsula
including metamorphic assemblage of granitic and volcanic rocks host geothermal
fluids. The two distinctive geothermal discharges (Armutlu and Yalova) take place
through lineaments appurtenant to the northern branch of NAFZ. Their discharge
temperatures of 65 Ë C (Yalova) and 70 Ë C (Armutlu) are the highest of the region.
According to their water chemical results, scaling tendency were computed by
using WATCH for different temperature steps under the assumptions of single-stage
adiabatic boiling and equilibrium degassing. To evaluate their scaling tendencies, mean
geothermal reservoir temperatures were computed by using chemical geothermometers.
Scaling tendencies were plotted for calcite, amorphous silica and quartz minerals for
different temperature values including reservoir temperatures. Their scaling behavior
reveals that oversaturation with calcite and quartz minerals are rapidly attained
for the geothermal fluids (Yalova and Armutlu) at relatively lower temperatures.
Regarding amorphous silica, they are completely undersaturated. Besides, Langelier
Saturation Index (LSI) and Ryznar Stability Index (RSI) were calculated. Their results
depict scale formation due to being positive LSI and less than 6.0 of RSI values. |
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