Heat flow, thermal anomalies, tectonic regimes and high-temperature geothermal systems in fault zones

IF 2 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
Laurent Guillou-Frottier, Gaétan Milesi, Vincent Roche, Hugo Duwiquet, Audrey Taillefer
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引用次数: 0

Abstract

The potential of high-temperature (>150°C) geothermal systems in crustal fault zones (fault cores and hundreds of meters wide networks of interconnected fractures in the damage zone) is underestimated. Based on numerical models, we show that topography-driven, poroelasticity-driven as well as buoyancy-driven forces play a significant role in the establishment of shallow (1–4 km) thermal anomalies in fault zones. We investigate the role of permeability, topography, fault dip, tectonic regime and fault geometry on the amplitude of thermal anomalies. Favorable conditions include: (i) a damage zone thickness > 100 m, (ii) a minimum cumulative displacement of 100–150 m and (iii) fault zone lengths of at least one kilometer. Based on these parameters, we propose new potential targets for the geothermal exploration of fault zones in Western Europe.
断裂带的热流、热异常、构造制度和高温地热系统
地壳断裂带(断层核和破坏区内数百米宽的相互连接的裂缝网络)中高温(bb0 - 150℃)地热系统的潜力被低估了。基于数值模型,我们发现地形驱动、孔隙弹性驱动和浮力驱动在断裂带浅层(1 ~ 4 km)热异常的形成中起着重要作用。我们研究了渗透率、地形、断层倾角、构造制度和断层几何形状对热异常振幅的作用。有利条件包括:(i)破坏带厚度为100 - 100米,(ii)最小累积位移为100 - 150米,(iii)断裂带长度至少为1公里。在此基础上,提出了西欧断裂带地热勘探新的潜在目标。
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来源期刊
Comptes Rendus Geoscience
Comptes Rendus Geoscience 地学-地球科学综合
CiteScore
2.80
自引率
14.30%
发文量
68
审稿时长
5.9 weeks
期刊介绍: Created in 1835 by physicist François Arago, then Permanent Secretary, the journal Comptes Rendus de l''Académie des sciences allows researchers to quickly make their work known to the international scientific community. It is divided into seven titles covering the range of scientific research fields: Mathematics, Mechanics, Chemistry, Biology, Geoscience, Physics and Palevol. Each series is led by an editor-in-chief assisted by an editorial committee. Submitted articles are reviewed by two scientists with recognized competence in the field concerned. They can be notes, announcing significant new results, as well as review articles, allowing for a fine-tuning, or even proceedings of symposia and other thematic issues, under the direction of invited editors, French or foreign.
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