气候变化领域集成服务门户(CCPortal): Fault Control on a Thermal Anomaly: Conceptual and Numerical Modeling of a Low-Temperature Geothermal System in the Southern Alps Foreland Basin (NE Italy)

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DOI	10.1029/2019JB017394
	Fault Control on a Thermal Anomaly: Conceptual and Numerical Modeling of a Low-Temperature Geothermal System in the Southern Alps Foreland Basin (NE Italy)
	Pola M.; Cacace M.; Fabbri P.; Piccinini L.; Zampieri D.; Torresan F.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	The interest on low-temperature geothermal resources is progressively increasing since their renewability and widespread availability. Despite their frequency, these resources and their development have been only partially investigated. This paper unravels the major physical processes driving a low-temperature geothermal resource in NE Italy (Euganean Geothermal System) through conceptual and numerical modeling. Dense fracturing associated to regional fault zones and a relay ramp enhances regional to local flow of thermal waters. Their rapid upwelling in the Euganean Geothermal Field is favored by open extensional fractures deforming the relay ramp. The water (65–86 °C) is intensively exploited for balneotherapy, rendering it a profitable resource. Three-dimensional coupled flow and heat transport numerical simulations based on this conceptual model are performed. Despite the presence of a uniform basal heat flow, a thermal anomaly corresponding to field observations develops in the modeling domain reproducing the relay ramp. Intensive fracturing extending across a wide area and a slightly anomalous heat flow favors a local increase in convection that drives the upwelling of deep-seated hot waters. The simulations corroborate and refine the conceptual model, revealing that water of up to 115 °C is likely to be found in the unexplored part of the thermal field. This study furthers knowledge on fault-controlled low-temperature geothermal resources where the geological setting could enhance local convection without anomalous heat flows, creating temperatures favorable for energy production. Conceptual and numerical modeling based on solid geological and hydrogeological reconstructions can offer a support tool for further detailed explorations of these prominent resources. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	conceptual and numerical modeling; Eastern Southern Alps foredeep; Euganean Geothermal Field; extensional fractures deforming a relay ramp; geothermal system in carbonates; local convective process
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187846
作者单位	Croatian Geological Survey, Zagreb, Croatia; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, Potsdam, Germany; Department of Geosciences, Università degli Studi di Padova, Padova, Italy; Geothermal System Hydrostructures (GSH), Interdepartmental Centre “Giorgio Levi Cases” for Energy Economics and Technology, Università degli Studi di Padova, Padova, Italy
推荐引用方式 GB/T 7714	Pola M.,Cacace M.,Fabbri P.,et al. Fault Control on a Thermal Anomaly: Conceptual and Numerical Modeling of a Low-Temperature Geothermal System in the Southern Alps Foreland Basin (NE Italy)[J],2020,125(5).
APA	Pola M.,Cacace M.,Fabbri P.,Piccinini L.,Zampieri D.,&Torresan F..(2020).Fault Control on a Thermal Anomaly: Conceptual and Numerical Modeling of a Low-Temperature Geothermal System in the Southern Alps Foreland Basin (NE Italy).Journal of Geophysical Research: Solid Earth,125(5).
MLA	Pola M.,et al."Fault Control on a Thermal Anomaly: Conceptual and Numerical Modeling of a Low-Temperature Geothermal System in the Southern Alps Foreland Basin (NE Italy)".Journal of Geophysical Research: Solid Earth 125.5(2020).