Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Critical Tectonic Limits for Geothermal Aquifer Use: Case Study from the East Slovakian Basin Rim

Version 1 : Received: 8 March 2021 / Approved: 9 March 2021 / Online: 9 March 2021 (09:48:43 CET)

A peer-reviewed article of this Preprint also exists.

Jacko, S.; Farkašovský, R.; Ďuriška, I.; Ščerbáková, B.; Bátorová, K. Critical Tectonic Limits for Geothermal Aquifer Use: Case Study from the East Slovakian Basin Rim. Resources 2021, 10, 31. Jacko, S.; Farkašovský, R.; Ďuriška, I.; Ščerbáková, B.; Bátorová, K. Critical Tectonic Limits for Geothermal Aquifer Use: Case Study from the East Slovakian Basin Rim. Resources 2021, 10, 31.

Journal reference: Resources 2021, 10, 31
DOI: 10.3390/resources10040031

Abstract

The Pannonian basin major heat system in Central Europe. Their peripheral basins like the East Slovakian basin is a example of a geothermal structure with a linear directed heat flow ranging from 90 to 100 mW /m2 from west to east. However, the use of the geothermal source is limited by several critical tectono-geologic factors: (a) tectonics, and the associated disintegration of the aquifer block by multiple deformations during the pre-Paleogene mainly Miocene period. The main discontinuities of NW-SE and N-S direction negatively affect the permeability of the environment. On the contrary, for utilization are important the secondary minor NE-SW dilatation open fractures which have developed by sinistral transtension on N–S faults and accelerated normal movements to the southeast in the present. (b) hydrogeological conditions, the geothermal structure accommodated three water types, namely Na-HCO3 with 10.9 g.l-1 mineralization (in the north), the Ca-Mg-HCO3 with 0.5 – 4.5 g.l-1 mineralization (in the west), and Na-Cl water type containing 26.8-33.4 g.l-1 (in the southwest) mineralization. The chemical composition is influenced by the Middle Triassic dolomites aquifer as well as by infiltration of saline solutions and meteoric waters along open fractures/faults. (c) geothermally anomalous heat 123 – 129 °C close to volcanic chain with 170 l/s total flow seems to be the perspective for heat production.

Subject Areas

geotherm; heat flow; permeability; structural modeling; seismic; resources; renewable; utilization; Pannonian basin; East Slovakian basin

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