Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/47439
Title: Step-Over Fault Zones Controlling Geothermal Fluid-Flow and Travertine Formation (Denizli Basin, Turkey)
Authors: Brogi, Andrea
Alcicek, M. Cihat
Liotta, Domenico
Capezzuoli, Enrico
Zucchi, Martina
Matera, Paola Francesca
Keywords: Geothermal Systems
Extensional Tectonics
Relay Zones
Banded Ca-Carbonate Veins
Travertine
Western Anatolia
Publisher: Pergamon-elsevier Science Ltd
Abstract: In the Honalilar area (Denizli Basin, Turkey), the occurrence of banded Ca-carbonate veins and travertine deposits, represented by a dismantled fissure ridge-type depositional system, are the evidence of a middle-late Pleistocene exhumed, shallow, hydrothermal system. Their occurrence offers the best opportunity to: (i) reconstruct the fluid paths from the underground to the palaeo-surface, and (ii) analyse the role of fault zones in controlling the permeability and fluids circulation. Permeability developed in overstepping regional scale normal faults, with a slight left-lateral oblique-slip component. At the surface, faults favored the localization and development of a fissure ridge-type travertine deposit. At depth, the root of the hydrothermal system consists of W-E oriented fractures filled of up to 6.5 m thick Ca-carbonate veins, developed in a high dilatation zone. It corresponds to the step-over determined by the oblique-slip kinematics of the NW-striking main faults. The high dilatation step-over zone contrasted the progressive sealing induced by the concomitant Ca-carbonate deposition within the fractures, thus favoring permeability maintenance and fluids circulation for at least 200 ka. This evidence adds key inputs for predicting permeable volumes during geothermal exploration in areas affected by extensional tectonics. The main NW-oriented faults remained active even after the hydrothermal fluid flow, causing the dismantlement and progressive exhumation of the upper part of the hydrothermal system.
Description: Capezzuoli, Enrico/0000-0002-4199-1870; Alcicek, Mehmet Cihat/0000-0001-7689-7625; Brogi, Andrea/0000-0002-3386-3609; Zucchi, Martina/0000-0001-7598-4313; Matera, Paola Francesca/0000-0003-4894-7394
URI: https://doi.org/10.1016/j.geothermics.2020.101941
ISSN: 0375-6505
1879-3576
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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