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Journal Article

Seismisches Abbilden von Krustenstrukturen

Authors
/persons/resource/klaus

Bauer,  Klaus       
Vol. 6, Issue 1 (2016), GFZ Journal 2016, System Erde : GFZ Journal, Deutsches GeoForschungsZentrum;
2.7 Near-surface Geophysics, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

/persons/resource/trond

Ryberg,  T.
Vol. 6, Issue 1 (2016), GFZ Journal 2016, System Erde : GFZ Journal, Deutsches GeoForschungsZentrum;
2.2 Geophysical Deep Sounding, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

/persons/resource/ben

Braeuer,  B.
Vol. 6, Issue 1 (2016), GFZ Journal 2016, System Erde : GFZ Journal, Deutsches GeoForschungsZentrum;
2.2 Geophysical Deep Sounding, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

/persons/resource/haber

Haberland,  C.       
Vol. 6, Issue 1 (2016), GFZ Journal 2016, System Erde : GFZ Journal, Deutsches GeoForschungsZentrum;
2.2 Geophysical Deep Sounding, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

/persons/resource/mhw

Weber,  Michael
Vol. 6, Issue 1 (2016), GFZ Journal 2016, System Erde : GFZ Journal, Deutsches GeoForschungsZentrum;
2.2 Geophysical Deep Sounding, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
Publikationen aller GIPP-unterstützten Projekte, Deutsches GeoForschungsZentrum;

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http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:1529012
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Fulltext (public)

GFZ_syserde.06.01.02.pdf
(Publisher version), 340KB

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Citation

Bauer, K., Ryberg, T., Braeuer, B., Haberland, C., Weber, M. (2016): Seismisches Abbilden von Krustenstrukturen. - System Erde, 6, 1, 12-17.
https://doi.org/10.2312/GFZ.syserde.06.01.2


Cite as: https://gfzpublic.gfz.de/pubman/item/item_1504374
Abstract
Deep seismic sounding provides important information on the seismic structure of the crust. Seismic experiments make use of controlled sources (explosions, Vibroseis) or natural sources (earthquakes, ambient noise), or combinations of both types. Seismic velocities are derived from modelling or tomographic inversion of diving waves and refractions. Particularly the combined interpretation of compressional and shear velocities allows for insight into the lithological structure of the crust. Seismic reflectivity is derived from imaging of waves reflected at geological boundaries. Typical patterns of crustal reflectivity are observed for specific tectonic settings. Case studies are shown from two studies at plate boundary systems. (1) The old plate boundary at the Namibian margin was formed by Cretaceous continental rifting and its interplay with the activities of the Tristan da Cunha mantle plume. Traces of intensive magmatic overprinting of the crust at the landfall region of Walvis Ridge can be seen in the derived velocity model and also in the reflectivity image. (2) The Dead Sea transform marks the active boundary between the African and Arabian plates. The Dead Sea basin was formed by pull-apart in response to step-over of the fault system. Results from tomography reveal a deep asymmetric basin structure. An anomalous body was found under the basin, between 13 and 18 km depth, which is interpreted as pre-basin sediments. Our results are supported by the distribution of earthquakes. The results provide new constraints for the modeling of plate boundary processes.