Models of heat transport in the Central European Basin System: Effective mechanisms at different scales

Scheck‐Wenderoth, Magdalena; Cacace, Mauro; Maystrenko, Yuriy; Cherubini, Yvonne; Noack, Vera; Kaiser, Björn Onno; Sippel, Judith; Lewerenz, Björn

doi:10.1016/j.marpetgeo.2014.03.009

Cited by 51 publications

(37 citation statements)

References 71 publications

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“…We have followed a strategy to (1) take into account various geological and geophysical data to constrain a starting density model with defined interfaces and densities for the sedimentary and volcanic cover, the crystalline crust and the mantle, and (2) modify the density configuration of the crust within the data constraints to fit the observed gravity. We have used the 3-D potential field modelling software IGMAS+ (Transinsight GmbH © ), which allows for interactively changing 3-D density configurations while simultaneously maintaining visual control over the calculated gravity response (Schmidt et al, 2011).…”

Section: Modelling Approach: 3-d Data Integration and Gravity Modellingmentioning

confidence: 99%

The Kenya rift revisited: insights into lithospheric strength through data-driven 3-D gravity and thermal modelling

et al. 2017

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Abstract. We present three-dimensional (3-D) models that describe the present-day thermal and rheological state of the lithosphere of the greater Kenya rift region aiming at a better understanding of the rift evolution, with a particular focus on plume–lithosphere interactions. The key methodology applied is the 3-D integration of diverse geological and geophysical observations using gravity modelling. Accordingly, the resulting lithospheric-scale 3-D density model is consistent with (i) reviewed descriptions of lithological variations in the sedimentary and volcanic cover, (ii) known trends in crust and mantle seismic velocities as revealed by seismic and seismological data and (iii) the observed gravity field. This data-based model is the first to image a 3-D density configuration of the crystalline crust for the entire region of Kenya and northern Tanzania. An upper and a basal crustal layer are differentiated, each composed of several domains of different average densities. We interpret these domains to trace back to the Precambrian terrane amalgamation associated with the East African Orogeny and to magmatic processes during Mesozoic and Cenozoic rifting phases. In combination with seismic velocities, the densities of these crustal domains indicate compositional differences. The derived lithological trends have been used to parameterise steady-state thermal and rheological models. These models indicate that crustal and mantle temperatures decrease from the Kenya rift in the west to eastern Kenya, while the integrated strength of the lithosphere increases. Thereby, the detailed strength configuration appears strongly controlled by the complex inherited crustal structure, which may have been decisive for the onset, localisation and propagation of rifting.

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Section: Modelling Approach: 3-d Data Integration and Gravity Modellingmentioning

confidence: 99%

The Kenya rift revisited: insights into lithospheric strength through data-driven 3-D gravity and thermal modelling

et al. 2017

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“…Scheck, 1997;Bayer et al, 1997;Ondrak et al, 1999;Vosteen et al, 2004;Norden et al, 2008;Noack et al, 2010;Norden et al, 2012;P. Balling et al, 2013;Sippel et al, 2013;Scheck-Wenderoth et al, 2014), thermal maturity studies (e.g. Friberg et al, 2000;Rodon and Littke, 2005), type and configuration of basement and lower boundary (e.g.…”

Section: Previous Modelling Studiesmentioning

confidence: 99%

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 2: A case study from the Danish-German border region

Fuchs

Balling

2016

Geothermics

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Highlights 3D steady-state thermal FE model using Feflow  Well-log based parameterization approach  Spatial parameterization of rock thermal conductivity  New heat-flow data  North German Basin (Danish-German border area) ABSTRACT We present a 3D numerical crustal temperature model and analyse the present-day conductive thermal field of the Danish-German border region. The model region covers the northernmost part of the North German Basin, a transition zone between the deep-reaching sedimentary rocks of the Glückstadt Graben (including complex salt structures) and the shallow crystalline basement of the Ringkøbing-Fyn High. The modelling approach is novel as it implements for the first time a comprehensive analysis of well-log data on a regional modelling scale. Those logs were used both to derive the spatial distribution of rock thermal conductivity across the study area, and to calculate heat flow values. New values of terrestrial surface heat flow are reported for eight deep boreholes in the North German Basin ranging from 72 to 84 mW/m² with a mean of 80 ± 5 mW/m². The values are computed from continuous temperature logs, carefully corrected BHT values, drill-stem tests and well-log derived rock thermal properties (thermal conductivity, radiogenic heat production) and were included in the setup of the numerical lower boundary conditions. New surface heat flow is up to 20 mW/m² higher than low values reported in some previous studies for this region. Heat flow from the mantle is 33 to 40 mW/m². The model temperature predictions are validated against 59 temperature observations from 24 wells. The prediction uncertainties between observed and modelled temperatures at deep borehole sites are small (rms = 3.5 °C, ame = 2.1 °C). Pronounced lateral temperature variations are predicted and found to be caused mainly by complex geological structures, including a large amount of salt structures and marked lateral variations in the thickness of basin sediments. The associated variations in rock thermal conductivity generate significant variations in model heat flow and large variations in temperature gradients.With regard to the utilization of geothermal energy, the Rhaetian and the Middle Buntsandstein sandstone reservoirs are found with temperatures within the range of 40-80 °C, suitable for low enthalpy heating purposes, in most of the area and locally also with higher temperatures.Temperatures above 120 °C, of interest for the production of electricity, are observed only in the very southeastern part of the study area.

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“…Thereby, we follow a modelling approach, whose advantages have already been demonstrated for different sedimentary basins in the past, e.g. for the North German Basin by Noack et al (2013) and Scheck-Wenderoth et al (2014). In this approach, we combine the calculations of the 3D lithospheric-scale conductive thermal field by Przybycin et al (2015b) with coupled basin-scale simulations of the fluid and heat transport to predict the thermal field in the European Molasse Basin.…”

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confidence: 99%

The origin of deep geothermal anomalies in the German Molasse Basin: results from 3D numerical models of coupled fluid flow and heat transport

2017

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Models of heat transport in the Central European Basin System: Effective mechanisms at different scales

Cited by 51 publications

References 71 publications

The Kenya rift revisited: insights into lithospheric strength through data-driven 3-D gravity and thermal modelling

The Kenya rift revisited: insights into lithospheric strength through data-driven 3-D gravity and thermal modelling

Improving the temperature predictions of subsurface thermal models by using high-quality input data. Part 2: A case study from the Danish-German border region

The origin of deep geothermal anomalies in the German Molasse Basin: results from 3D numerical models of coupled fluid flow and heat transport

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