کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4728717 1640199 2015 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effects of extensional structures on the heat transport mechanism: An example from the Ortakçı geothermal field (Büyük Menderes Graben, SW Turkey)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
The effects of extensional structures on the heat transport mechanism: An example from the Ortakçı geothermal field (Büyük Menderes Graben, SW Turkey)
چکیده انگلیسی


• Continuing fractures systems in the active fault zones cause high permeability fluid flows.
• Hot water outflows are related to the high-angle normal faults on hanging wall of the detachment faults.
• Heat transport is controlled by faults in a convection dominated systems.
• Large extension rates result in a thinned crust and increased heat flow rates.

The extensional stress regime is very effective in western Turkey since the Latest Oligocene-Early Miocene. Geothermal fields are positioned on the high-angle normal faults along the northern and southern margins of the Büyük Menderes and Gediz grabens, respectively. The Ortakçı geothermal field is located on the tectonically active northern margin of Büyük Menderes graben. The discharge rate and temperature of the Ortakçı hot spring is 2.4 l/s and 50.5 °C, respectively. Hot water discharges in the relay ramp representing the overlapping regions of two E–W normal faults related to N–S-oriented extension. The high-angle normal faults provide pathways for the fluid flow by increasing dilations. The field observations prove that all hot water outflows are related to the high-angle normal faults on the hanging wall of the detachment faults. Detailed structural analyses were performed on the Ortakçı geothermal field, particularly on one of the active hot springs at the intersection of the E–W and N–S-oriented faults, to evaluate the tectonic activity in the area and the flow pathways for geothermal fluids. The heat source is the shallow mantle of a thinned lithosphere due to large extension rates, resulting in increased heat flow. The tectonic effects are on the heat transport mechanism, and the heat transport is controlled by faults in a convection dominated systems. The result is a high geothermal gradient because water can circulate deep and transports the heat upwards to the surface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of African Earth Sciences - Volume 108, August 2015, Pages 74–88
نویسندگان
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