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Heterogeneous crystalline crust controls the shallow thermal field – a case study of Hessen (Germany)

Freymark, J. and Sippel, J. and Scheck-Wenderoth, M. and Bär, K. and Stiller, M. and Kracht, M. and Fritsche, J.-G. (2015):
Heterogeneous crystalline crust controls the shallow thermal field – a case study of Hessen (Germany).
In: Energy Procedia, pp. 331-340, (76), ISSN 18766102, [Online-Edition: DOI: 10.1016/j.egypro.2015.07.837.],
[Article]

Abstract

We present a seismic- and 3D-gravity-constrained lithospheric-scale 3D structural model of Hessen that differentiates 7 sedimentary units, 5 Variscan upper crustal bodies, the lower crystalline crust and the lithospheric mantle. To predict the presentday subsurface temperatures, we solve the steady-state conductive heat equation by using a 3D FE method and assigning lithology-dependent thermal properties. We show that the thermal field is mainly controlled by the varying radiogenic heat production in the crystalline crust, which results in a colder NW and a warmer SE domain. Locally, this regional trend is superimposed by thermal blanketing of low-conductive sediments leading to higher temperatures.

Item Type: Article
Erschienen: 2015
Creators: Freymark, J. and Sippel, J. and Scheck-Wenderoth, M. and Bär, K. and Stiller, M. and Kracht, M. and Fritsche, J.-G.
Title: Heterogeneous crystalline crust controls the shallow thermal field – a case study of Hessen (Germany)
Language: English
Abstract:

We present a seismic- and 3D-gravity-constrained lithospheric-scale 3D structural model of Hessen that differentiates 7 sedimentary units, 5 Variscan upper crustal bodies, the lower crystalline crust and the lithospheric mantle. To predict the presentday subsurface temperatures, we solve the steady-state conductive heat equation by using a 3D FE method and assigning lithology-dependent thermal properties. We show that the thermal field is mainly controlled by the varying radiogenic heat production in the crystalline crust, which results in a colder NW and a warmer SE domain. Locally, this regional trend is superimposed by thermal blanketing of low-conductive sediments leading to higher temperatures.

Journal or Publication Title: Energy Procedia
Number: 76
Uncontrolled Keywords: Upper Rhine Graben; structural model; gravity modelling; conductive thermal model; Variscan domains
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geothermal Science and Technology
11 Department of Materials and Earth Sciences > Earth Science
11 Department of Materials and Earth Sciences
Date Deposited: 06 Nov 2015 15:45
Official URL: DOI: 10.1016/j.egypro.2015.07.837.
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