Details
Original language | English |
---|---|
Pages (from-to) | 305-311 |
Number of pages | 7 |
Journal | Physics and chemistry of the earth |
Volume | 21 |
Issue number | 4 |
Early online date | 26 Feb 1999 |
Publication status | E-pub ahead of print - 26 Feb 1999 |
Externally published | Yes |
Abstract
The new Bouguer anomaly map of the Harz Mountains based on 60,000 gravity measurements is presented. The interpretation is done by three dimensional (3-D) gravity modelling, mostly concentrating on the granitic intrusions. The Brocken Granite is modelled as a flattish body with maximum thickness of 2.5 km. The Ramberg Granite is up to 8.5 km thick with a north-south extent of 35 km. The present mass distribution is an important boundary condition for geodynamic investigations using the finite-element method (FEM). It can be shown that the Harz Mountains are not isostatically compensated. Further calculations deal with the Central European Variscan Belt and reveal a horizontal shortening of 600 m for the Harz Mountains. Considering the Harz Mountains as a wrench-fault-system by taking into account an east-west shortening of 1 km results in a calculated uplift of 220 m which is much less than the vertical displacement at the northern boundary fault zone estimated from gravity and seismic studies.
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- General Earth and Planetary Sciences
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In: Physics and chemistry of the earth, Vol. 21, No. 4, 26.02.1999, p. 305-311.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The Harz Mountains, Germany
T2 - Finite-Element Modelling of the Evolution Based on the Interpretation of the Gravity Field
AU - Gabriel, G.
AU - Jahr, T.
AU - Jentzsch, G.
AU - Melzer, J.
N1 - Funding Information: Acknowledgements. Part of this work was supported by BEB Erd-gas ErdSl GmbH, Hannover, research funds of the government of Niedersachsen and by the Deutsche Forschungsgemeinschaft (DFG, Gemany). Most of the field work was carried out by Geo-physik GGD, Leipzig. D. Hiinig, W. Conrad and H. J. Franzke are acknowledged for fruitful discussions concerning geophysical and geological questions. S. Schmidt and H.-J. G&e enable the use of the gravity modelling package IGAS and advised us in our work based on their experiences. The finite-element modellingwas done with the software ABAQUS, developed by Hibbit, Karlsson and Sorensen Inc. (1994). The critical and helpful comments on the manuscript by H.-J. G&e and an anonymous reviewer are gratefully acknowledged.
PY - 1999/2/26
Y1 - 1999/2/26
N2 - The new Bouguer anomaly map of the Harz Mountains based on 60,000 gravity measurements is presented. The interpretation is done by three dimensional (3-D) gravity modelling, mostly concentrating on the granitic intrusions. The Brocken Granite is modelled as a flattish body with maximum thickness of 2.5 km. The Ramberg Granite is up to 8.5 km thick with a north-south extent of 35 km. The present mass distribution is an important boundary condition for geodynamic investigations using the finite-element method (FEM). It can be shown that the Harz Mountains are not isostatically compensated. Further calculations deal with the Central European Variscan Belt and reveal a horizontal shortening of 600 m for the Harz Mountains. Considering the Harz Mountains as a wrench-fault-system by taking into account an east-west shortening of 1 km results in a calculated uplift of 220 m which is much less than the vertical displacement at the northern boundary fault zone estimated from gravity and seismic studies.
AB - The new Bouguer anomaly map of the Harz Mountains based on 60,000 gravity measurements is presented. The interpretation is done by three dimensional (3-D) gravity modelling, mostly concentrating on the granitic intrusions. The Brocken Granite is modelled as a flattish body with maximum thickness of 2.5 km. The Ramberg Granite is up to 8.5 km thick with a north-south extent of 35 km. The present mass distribution is an important boundary condition for geodynamic investigations using the finite-element method (FEM). It can be shown that the Harz Mountains are not isostatically compensated. Further calculations deal with the Central European Variscan Belt and reveal a horizontal shortening of 600 m for the Harz Mountains. Considering the Harz Mountains as a wrench-fault-system by taking into account an east-west shortening of 1 km results in a calculated uplift of 220 m which is much less than the vertical displacement at the northern boundary fault zone estimated from gravity and seismic studies.
UR - http://www.scopus.com/inward/record.url?scp=0042639240&partnerID=8YFLogxK
U2 - 10.1016/S0079-1946(97)00053-0
DO - 10.1016/S0079-1946(97)00053-0
M3 - Article
AN - SCOPUS:0042639240
VL - 21
SP - 305
EP - 311
JO - Physics and chemistry of the earth
JF - Physics and chemistry of the earth
SN - 0079-1946
IS - 4
ER -