The Harz Mountains, Germany: Finite-Element Modelling of the Evolution Based on the Interpretation of the Gravity Field

Research output: Contribution to journalArticleResearchpeer review

Authors

  • G. Gabriel
  • T. Jahr
  • G. Jentzsch
  • J. Melzer

External Research Organisations

  • Clausthal University of Technology
  • Friedrich Schiller University Jena
  • Technische Universität Berlin
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Details

Original languageEnglish
Pages (from-to)305-311
Number of pages7
JournalPhysics and chemistry of the earth
Volume21
Issue number4
Early online date26 Feb 1999
Publication statusE-pub ahead of print - 26 Feb 1999
Externally publishedYes

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.

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Cite this

The Harz Mountains, Germany: Finite-Element Modelling of the Evolution Based on the Interpretation of the Gravity Field. / Gabriel, G.; Jahr, T.; Jentzsch, G. et al.
In: Physics and chemistry of the earth, Vol. 21, No. 4, 26.02.1999, p. 305-311.

Research output: Contribution to journalArticleResearchpeer review

Gabriel G, Jahr T, Jentzsch G, Melzer J. The Harz Mountains, Germany: Finite-Element Modelling of the Evolution Based on the Interpretation of the Gravity Field. Physics and chemistry of the earth. 1999 Feb 26;21(4):305-311. Epub 1999 Feb 26. doi: 10.1016/S0079-1946(97)00053-0
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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.",
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