Open AccessSeismic structure of a seaward‐dipping reflector sequence southwest of Rockall Plateau
Author(s) -
Whitmarsh R. B.,
Miles P. R.
Publication year - 1987
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1987.tb00751.x
Subject(s) - geology , seismology , plateau (mathematics) , reflector (photography) , sequence (biology) , seismogram , optics , mathematical analysis , light source , physics , mathematics , biology , genetics
Summary A seismic refraction line was obtained with a sonobuoy and airgun source over a seaward dipping reflector sequence on the southwest flank of the Rockall Plateau. The record section has been modelled using synthetic seismograms to obtain a well‐constrained velocity/depth structure down to about 4 km below the top of the dipping reflector sequence. The smooth increase of velocity in the upper 1.5 km probably is due to the downward closure of cracks and voids. The base of the dipping reflector sequence beneath the profile is associated with the bottom of a relatively rapid increase in velocity from about 5.5–6.5 km s −1 . A similar association of the base with a velocity increase from about 5.5–6.5 km s −1 off Queen Maud Land and under the Vøring Plateau suggests it may be a general feature of seaward dipping reflector sequences.