| Autor: |
Alain Geiger, Ch. Straub, Hans-Gert Kahle, Mueller, M. Baer, Nicholas Deichmann |
| Rok vydání: |
1993 |
| Předmět: |
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| Zdroj: |
Geodesy and Physics of the Earth ISBN: 9783540565727 |
| Popis: |
Geodynamic processes which are ascribed to relative motions between the Eurasian plate and the so-called Adriatic promontory govern the ongoing plate tectonic activity in the central Mediterranean/Alpine region. Superimposed on the underthrusting of the Adriatic block beneath the Southern Alps seems to be a rotational motion caused by the postulated counter-clockwise rotation of the Italian peninsula. Recently established GPS networks as well as terrestrial levelling lines carried out in Switzerland since the last century can be used in the future to assess the strain tensor in the Swiss Alps. A crucial problem relevant for geodynamic research is the interpretation of the detected recent crustal movements in terms of stress and driving forces. This paper presents the results of a stress-strain analysis of the Swiss Alps, using an elementary 2D-model as well as a more complete 3D-model. In the latter case the highly complex structure of the Alpine crust has been simplified to a multilayer model, taking also detailed topography into account by means of digital terrain models. Isostatic forces as well as NNW-SSE compression of the Alpine chain have been introduced in finite element (FEM) calculations. The results reveal a striking agreement with the levelled uplift rates. Furthermore comparisons are made between the calculated strain energy and the regional seismicity. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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