Seismological evidence for a very sharp Sorgenfrei-Tornquist Zone in southern Sweden

RAINER KIND; SØREN GREGERSEN; WINFRIED HANKA; GÜNTER BOCK

doi:10.1017/S0016756897007486

Abstract

A passive seismological experiment across the northern boundary of the Tornquist Fan was carried out from December 1994 until April 1995 along a 100 km long profile in Denmark and Sweden. Observed PS converted seismic waves indicate an abrupt increase in Moho depth of 4–5 km within 5 km horizontal distance at about 50 km to the northeast of the Øresund. This is a much sharper jump than that inferred from the wide-angle data of EUGENO-S line 1. Preliminary analysis of seismic shear wave anisotropy indicates asthenospheric mantle flow parallel to the Sorgenfrei-Tornquist Zone. These parallel directions are already observed between the Elbe Line and the Sorgenfrei-Tornquist Zone while further south in central Europe the flow directions follow the trend of the Alpine belt.

Crossref Citations

This article has been cited by the following publications. This list is generated based on data provided by Crossref.

Wilde-Piórko, M. and Grad, M. 1999. Regional and teleseismic events recorded across the TESZ during POLONAISE'97. Tectonophysics, Vol. 314, Issue. 1-3, p. 161.

Wylegalla, K. Bock, G. Gossler, J. and Hanka, W. 1999. Anisotropy across the Sorgenfrei–Tornquist Zone from shear wave splitting. Tectonophysics, Vol. 314, Issue. 1-3, p. 335.

Meissner, R. and Krawczyk, C.H. 1999. Caledonian and Proterozoic terrane accretion in the southwest Baltic Sea. Tectonophysics, Vol. 314, Issue. 1-3, p. 255.

Pharaoh, T.C. 1999. Palaeozoic terranes and their lithospheric boundaries within the Trans-European Suture Zone (TESZ): a review. Tectonophysics, Vol. 314, Issue. 1-3, p. 17.

Gossler, Jürgen Kind, Rainer Sobolev, Stephan V. Kämpf, Horst Wylegalla, Kurt and Stiller, Manfred 1999. Major crustal features between the Harz Mountains and the Baltic Shield derived from receiver functions. Tectonophysics, Vol. 314, Issue. 1-3, p. 321.

Hock, Silke and Korn, Michael 2000. Random heterogeneity of the lithosphere across the Trans-European Suture Zone. Geophysical Journal International, Vol. 141, Issue. 1, p. 57.

Gregersen, S and Voss, P 2002. Summary of project TOR: delineation of a stepwise, sharp, deep lithosphere transition across Germany–Denmark–Sweden. Tectonophysics, Vol. 360, Issue. 1-4, p. 61.

Plomerová, J Babuška, V Vecsey, L and Kouba, D 2002. Seismic anisotropy of the lithosphere around the Trans-European Suture Zone (TESZ) based on teleseismic body-wave data of the TOR experiment. Tectonophysics, Vol. 360, Issue. 1-4, p. 89.

Alinaghi, A. Bock, G. Kind, R. Hanka, W. and Wylegalla, K. 2003. Receiver function analysis of the crust and upper mantle from the North German Basin to the Archaean Baltic Shield. Geophysical Journal International, Vol. 155, Issue. 2, p. 641.

Babuška, Vladislav and Plomerová, Jaroslava 2004. The Sorgenfrei–Tornquist Zone as the mantle edge of Baltica lithosphere: new evidence from three‐dimensional seismic anisotropy. Terra Nova, Vol. 16, Issue. 5, p. 243.

Pharaoh, T. C. Winchester, J. A. Verniers, J. Lassen, A. and Seghedi, A. 2006. The Western Accretionary Margin of the East European Craton: an overview. Geological Society, London, Memoirs, Vol. 32, Issue. 1, p. 291.

Gregersen, Soren Voss, Peter Shomali, Z. Hossein Grad, Marek and Roberts, Roland G. 2006. Physical differences in the deep lithosphere of Northern and Central Europe. Geological Society, London, Memoirs, Vol. 32, Issue. 1, p. 313.

Gregersen, S. Voss, P. Nielsen, L.V. Achauer, U. Busche, H. Rabbel, W. and Shomali, Z.H. 2010. Uniqueness of modeling results from teleseismic P-Wave tomography in Project Tor. Tectonophysics, Vol. 481, Issue. 1-4, p. 99.

Phillips, Thomas B. Jackson, Christopher A.-L. Bell, Rebecca E. and Duffy, Oliver B. 2018. Oblique reactivation of lithosphere-scale lineaments controls rift physiography – the upper-crustal expression of the Sorgenfrei–Tornquist Zone, offshore southern Norway. Solid Earth, Vol. 9, Issue. 2, p. 403.

Grad, Marek 2019. Podolian, Saxonian and baltic plates – Teisseyre–Tornquist Line and the edge of the East European Craton. Geochemistry, Vol. 79, Issue. 3, p. 422.

Grund, Michael and Ritter, Joachim R R 2020. Shear-wave splitting beneath Fennoscandia — evidence for dipping structures and laterally varying multilayer anisotropy. Geophysical Journal International, Vol. 223, Issue. 3, p. 1525.

Phillips, Thomas B. Jackson, Christopher A.-L. and Norcliffe, James R. 2020. Pre-inversion normal fault geometry controls inversion style and magnitude, Farsund Basin, offshore southern Norway. Solid Earth, Vol. 11, Issue. 4, p. 1489.

Article contents

Seismological evidence for a very sharp Sorgenfrei-Tornquist Zone in southern Sweden

Abstract

Access options

This article has been cited by the following publications. This list is generated based on data provided by Crossref.

Article contents

Seismological evidence for a very sharp Sorgenfrei-Tornquist Zone in southern Sweden

Abstract

Access options

Save article to Kindle

Save article to Dropbox

Save article to Google Drive

Reply to: Submit a response

Your details

You have entered the maximum number of contributors

Conflicting interests