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Use of mode-converted waves in marine seismic data to investigate the lithology of the sub-bottom sediments in Isfjorden, Svalbard (1995)

Digranes, Per ; Kristoffersen, Yngve

Springer

Pure and applied geophysics 145 (1995), S. 313-325

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ISSN: 1420-9136

Keywords: Mode-conversion ; marine/land geometry ; V p /V s ratios ; lithology

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences , Physics

Notes: Abstracts The compression wavefield is efficiently converted to shear-wave energy at post-critical angles in areas of high impedance contrast at the sea floor. We have analysed mode-converted shear waves in a data set acquired with a hybrid marine/land geometry in Isfjorden, Svalbard. Through a kinematic 2D ray-tracing modellingV p/Vs ratios for part of the uppermost 5km of the crust are obtained. Low values (V p /V s =1.65) are tentatively associated with the section of Devonian sandstones which appears to attain a minimum thickness of 1.5km below 3 km depth about 10km west of Kapp Thorden.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00880273

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