The geology of the Odenwald Crystalline Complex

Stein, Eckardt

doi:10.1007/s007100170024

Cited by 36 publications

(26 citation statements)

References 17 publications

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“…Units. The thickness distribution of the main geological units (Figure 3) illustrates that the permeable Cenozoic sediments 3 Geofluids Marl, sand, and clay [32] 0.18 [16,[33][34][35][36] 7E − 14 [13,16,29,33,35,37] 860 [38] 1.3 [39] 1.0 [34] 2585 [24] Dogger/Lias/Keuper Clay, marlstone, limestone, and sandstone [39,40] 0.04 [37] 4E − 16 [35,37] 800 [34,41] 2.6 [39] 1.6 [34] 2667 [24] Pre [33,39] 1.0 [34] 2780 [24] UC: Mid-German Crystalline High Granitoids [33,44] 0.01 [34] 3E − 18 [37] 755 [33] 2.4 [33] 1.8 [45] 2717 [24] UC: Saxothuringian Slate, granitoids [46,47] 0.01 [34] 3E − 18 [37] 900 [34] 2.5 [48] 2.5 [47] 2747 [24] UC: Moldanubian Gneiss, gra...…”

Section: Configuration and Physical Properties Of The Geologicalmentioning

confidence: 99%

Influence of the Main Border Faults on the 3D Hydraulic Field of the Central Upper Rhine Graben

et al. 2019

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The Upper Rhine Graben (URG) is an active rift with a high geothermal potential. Despite being a well-studied area, the three-dimensional interaction of the main controlling factors of the thermal and hydraulic regime is still not fully understood. Therefore, we have used a data-based 3D structural model of the lithological configuration of the central URG for some conceptual numerical experiments of 3D coupled simulations of fluid and heat transport. To assess the influence of the main faults bordering the graben on the hydraulic and the deep thermal field, we carried out a sensitivity analysis on fault width and permeability. Depending on the assigned width and permeability of the main border faults, fluid velocity and temperatures are affected only in the direct proximity of the respective border faults. Hence, the hydraulic characteristics of these major faults do not significantly influence the graben-wide groundwater flow patterns. Instead, the different scenarios tested provide a consistent image of the main characteristics of fluid and heat transport as they have in common: (1) a topography-driven basin-wide fluid flow perpendicular to the rift axis from the graben shoulders to the rift center, (2) a N/NE-directed flow parallel to the rift axis in the center of the rift and, (3) a pronounced upflow of hot fluids along the rift central axis, where the streams from both sides of the rift merge. This upflow axis is predicted to occur predominantly in the center of the URG (northern and southern model area) and shifted towards the eastern boundary fault (central model area).

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Section: Configuration and Physical Properties Of The Geologicalmentioning

confidence: 99%

Influence of the Main Border Faults on the 3D Hydraulic Field of the Central Upper Rhine Graben

et al. 2019

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“…The central block represents the Northern Phyllite Zone, consisting of low grade metamorphic pelagic to hemipelagic and volcanoclastic rocks [21,40]. The South-Eastern block is the Mid-German Crystalline High with the outcropping Odenwald and consists of mainly felsic granitoids and subsidiary high-grade metamorphic rocks and mafic intrusives of the Odenwald [41]. The Variscan crust is the lowermost layer in the model and reaches up to 6.8 km in thickness in areas, where it crops out.…”

Section: Structural Modelmentioning

confidence: 99%

The Effects of Regional Fluid Flow on Deep Temperatures (Hesse, Germany)

et al. 2019

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A successful utilization of deep geothermal resources requires accurate predictions about the distribution of reservoir temperature as well as of the hydraulic processes exerting a direct influence on the productivity of geothermal reservoirs. The aim of this study was to investigate and quantify the influence that regional thermo-hydraulic processes have on the geothermal configuration of potential reservoirs in the German Federal State of Hesse. Specifically, we have addressed the question of how the regional thermal and hydraulic configuration influence the local hydro-thermal reservoir conditions. Therefore, a 3D structural model of Hesse was used as a basis for purely hydraulic, purely thermal and coupled 3D thermo-hydraulic simulations of the deep fluid flow and heat transport. As a result of our numerical simulations, Hesse can be differentiated into sub-areas differing in terms of the dominating heat transport process. In a final attempt to quantify the robustness and reliability of the modelling results, the modelling outcomes were analyzed by comparing them to available subsurface temperature, hydraulic and hydrochemical data.

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“…Conventionally, these sediments are interpreted to be derived from the Mid-German Crystalline High. Most outcrops of this area yield metamorphic ages of 360 to 290 Ma (Kreuzer and Harre 1975;Lippolt 1986;Marheine 1997;Zeh et al 1997;Schubert et al 2001) and consist of LP-metamorphites and granites; MP-metamorphites are only locally known from the Böllstein-Ruhla area (Oncken 1997;Zeh 1999;Stein 2001). The scarcity of Devonian metamorphic ages and pressuredominated metamorphic rocks may be explained by later metamorphic and magmatic processes, which have caused isotopic resetting.…”

Section: Potential Source Areas Of Detrital Materialsmentioning

confidence: 93%