Thermal tracking of upper crustal fluid flow in the Rhine Graben

Details Thermal tracking of upper crustal fluid flow in the Rhine Graben Thermal tracking of upper crustal fluid flow in the Rhine Graben

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.1957p&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 13, p. 1957-1960

Physics

7

Hydrology: Groundwater Transport

Scientific paper

More than 52,000 temperature values from almost 10,000 boreholes in Germany have been incorporated into a data base since 1977. Due to petroleum-oriented drilling, a large quantitity of temperature data (both German and French) is available for the Rhine Graben. A horizontal temperature contour map for 800 m depth and a vertical cross section support the concept that thermal anomalies in the Rhine Graben are caused by convection in the upper crust. At the local scale of a borehole, large changes of the temperature gradient to depths of 5 km can roughly be related to different hydraulic conditions of the formations. A better means to qualitatively characterize the convective regime, however, is the observed thermal equilibration in a well after drilling disturbances. The data base is well suitable for an application of temperature as a tracer for fluid flow.

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