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Review of velocity models in the Faroe–Shetland Channel

By
Uni K. Petersen
Uni K. Petersen
Faroese Earth and Energy Directorate, Brekkutún 1, FO 110 Tórshavn, Faroe Islands
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Thomas Funck
Thomas Funck
Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 Copenhagen K, Denmark
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Published:
January 01, 2017

Abstract:

Over the last few decades, a number of wide-angle seismic experiments have been conducted in the Faroe–Shetland Channel area with the objective of mapping the crustal structure. However, the volcanic rocks covering most of the area present a challenge for the imaging of sub-basalt structures. The results of the seismic studies are consistent in describing the Faroe–Shetland Channel as thinned continental crust and in establishing the presence of sub-basalt sediments. However, the various datasets often show differences in depth to crystalline basement and to the Moho. This paper presents a review of the velocity models in the Faroe–Shetland Channel and analyses the differences at line intersections. Down to top basalt the models are fairly consistent, while there are deviations of up to 1 km s−1 in basalt velocities and sub-basalt sediment velocities, 2 km in basalt thickness, 3.2 km in depth to crystalline basement, and 11.7 km in depth to the Moho.

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Contents

Geological Society, London, Special Publications

The NE Atlantic Region. A Reappraisal of Crustal Structure, Tectonostratigraphy and Magmatic Evolution

G. Péron-Pinvidic
G. Péron-Pinvidic
Geological Survey of Norway, Norway
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J. R. Hopper
J. R. Hopper
Geological Survey of Denmark and Greenland, Denmark
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T. Funck
T. Funck
Geological Survey of Denmark and Greenland, Denmark
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M. S. Stoker
M. S. Stoker
British Geological Survey, UK
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C. Gaina
C. Gaina
University of Oslo, Norway
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J. C. Doornenbal
J. C. Doornenbal
Geological Survey of The Netherlands, The Netherlands
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U. E. Árting
U. E. Árting
Faroese Geological Survey, Faroe Islands
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The Geological Society of London
Volume
447
ISBN electronic:
978-1-78620-37-00
Publication date:
January 01, 2017

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