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Recent movement pattern of the Lower Rhine Embayment from tilt, gravity and GPS data

Published online by Cambridge University Press:  01 April 2016

J. Campbell ,
H.-J. Kümpel ,
M. Fabian ,
D. Fischer ,
B. Görres ,
Ch.J. Keysers  and
K. Lehmann
J. Campbell*
Affiliation:
Geodätisches Institut der Universität Bonn, Nussallee 17, 53115 Bonn, Germany
H.-J. Kümpel
Affiliation:
Geologisches Institut der Universität Bonn
M. Fabian
Affiliation:
Geologisches Institut der Universität Bonn
D. Fischer
Affiliation:
Geodätisches Institut der Universität Bonn, Nussallee 17, 53115 Bonn, Germany
B. Görres
Affiliation:
Geodätisches Institut der Universität Bonn, Nussallee 17, 53115 Bonn, Germany
Ch.J. Keysers
Affiliation:
Geodätisches Institut der Universität Bonn, Nussallee 17, 53115 Bonn, Germany Geologisches Institut der Universität Bonn
K. Lehmann
Affiliation:
Geologisches Institut der Universität Bonn
*
5corresponding author; e-mail: campbell@sn-geod-l.uni-bonn.de
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Abstract

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As part of the activities of the Collaborative Research Centre ‘SFB 350’, measurements of geodetic and geodynamic changes in the area of the Lower Rhine Embayment and the Rhenish Shield are being performed at different scales in space and time. Continuous borehole tilt measurements and repeated microgravimetric surveys yield information on the local stability of the ground and changes in horizontal gravity gradients that are both dominated by seasonal fluctuations. Results of more than seven years of regular GPS campaigns are discussed in terms of vertical and horizontal point motions. The most prominent motions are man-induced effects occurring in or near the browncoal mining areas, where groundwater withdrawal produces subsidence of up to 2.2 cm/y in the area under investigation. Horizontal and vertical motions at other GPS points are smaller by one order of magnitude and in most cases are only marginally detectable. The eastward motion of two points in the Bergisches Land and the westward motion of two points in the Eifel near the Belgian border may be interpreted as a result of the ongoing extension of the Cenozoic rift system in the western part of the Eurasian plate.

Keywords

tilt measurementsgravity surveyGPSheight variationssubsidenceLower Rhine Embayment
Type
Research Article
Information
Netherlands Journal of Geosciences , Volume 81 , Special Issue 2: Rift tectonics and syngenetic sedimentation - the Cenozoic Lower Rhine Basin and related structures , August 2002 , pp. 223 - 230
Copyright
Copyright © Stichting Netherlands Journal of Geosciences 2002

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