Thermal Signatures of Heat Transfer Processes in the Earth's Crust
This book deals with the signatures left by geodynamic proceses in the temperature field of the Earth's crust. First, it introduces briefly the established, indirect methods for interpreting the present termperature field and methods for reconstructing the thermal fields of the geological past. Then the spatial and temporal scales that are relevant for heat transport processes are described. This problem is discussed both theoretically and on the basis of data from the German Continental Deep Drilling Program (KTB). The climate of the last 200 years and the postglacial warming in central Europe are reconstructed on the basis of two sets of temperature data from shallow and deep boreholes. This book is written for an audience at an advanced undergraduate or graduate level with an understanding of basic physical principles. It avoids particular terminology, and special terms are introduced.
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SPATIAL AND TEMPORAL SCALES FOR HEAT TRANSPORT
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2-D model advection Archean arrow corresponds attenuation factor Bavaria Bayreuth BHT extrapolations Bohemian Massif calculated column conceptual model conductive heat constant correlate crystalline basement cutoff value Darcy velocity depth interval determined drill Earth's crust Earth's surface equation fluid flow Frankonian Line free convection geological gneiss ground temperature history groundwater heat flow density heat production rate heat transport heat transport processes homogeneous homogeneous model hydraulic potential inversion isotope Jobmann and Clauser Kohl and Rybach Kola KTB borehole KTB pilot borehole lower crust main borehole Mareschal maximum Mesozoic Mesozoic sediments metabasite meteorological model response orthonormal matrix paleo-temperature parameter values permeability Perturbation Proterozoic regional rock SG-3 borehole shallow boreholes shown in Plate signal singular value decomposition singular values steady-state surface temperature Table temperature field temperature log recorded thermal conductivity thermal diffusivity transient upper crust variations vector vertical component vertical heat flow vertical temperature gradient