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A crustal seismic velocity model for the UK, Ireland and surrounding seas

By Annabel Kelly, Richard W. England and Peter K. H. Maguire

Abstract

A regional model of the 3-D variation in seismic P-wave velocity structure in the crust of NW Europe has been compiled from wide-angle reflection/refraction profiles. Along each 2-D profile a velocity–depth function has been digitised at 5 km intervals. These 1-D velocity functions were mapped into three dimensions using ordinary kriging with weights determined to minimise the difference between digitised and interpolated values. An analysis of variograms of the digitised data suggested a radial isotropic weighting scheme was most appropriate. Horizontal dimensions of the model cells are optimised at 40 × 40 km and the vertical dimension at 1 km. The resulting model provides a higher resolution image of the 3-D variation in seismic velocity structure of the UK, Ireland and surrounding areas than existing models. The construction of the model through kriging allows the uncertainty in the velocity structure to be assessed. This uncertainty indicates the high density of data required to confidently interpolate the crustal velocity structure, and shows that for this region the velocity is poorly constrained for large areas away from the input data.Peer-reviewedPublisher Versio

Publisher: Oxford University Press for Royal Astronomical Society
Year: 2007
DOI identifier: 10.1111/j.1365-246X.2007.03569.x
OAI identifier: oai:lra.le.ac.uk:2381/2216
Journal:

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  1. (1997). A global digital map of sediment thickness,
  2. (1995). A high-velocity layer in the lower crust of the North German Basin, doi
  3. (1989). A north-south seismic profile across the Caledonian Suture zone in Ireland, doi
  4. (1971). A refraction study of the crustal structure of southern Norway,
  5. (1998). A wide-angle seismic traverse through the Variscan of southwest Ireland, doi
  6. (2006). Analysis of the crustal velocity structure of the British Isles using teleseismic receiver functions, doi
  7. (1985). Atlas of Onshore Sedimentary Basins in England and
  8. (2001). Crustal structure along the EGT profile across the Tornquist Fan interpreted from seismic, gravity and magnetic data, doi
  9. (2003). Crustal structure and evolution of the Faeroe, Møre and Vøring margins from wide-angle seismic and gravity data, PhD thesis.
  10. (1997). Crustal structure around the Faroe Islands, PhD thesis.
  11. (1999). Crustal structure east of the Faroe islands: mapping sub-basalt sediment using wide-angle seismic data, doi
  12. (1997). Crustal structure of the central part of the Vøring Basin, mid-Norway margin, from Ocean Bottom Seismographs, doi
  13. (1984). Crustal structure of the continental shelf off northwest Britain from two-ship seismic experiments, doi
  14. (1994). Crustal structure of the Goban Spur rifted continental margin, doi
  15. Crustal structure of the NE Rockall Trough from wide-angle seismic data modeling, doi
  16. (1998). Crustal structure of the northern part of the Vøring Basin, mid-Norway margin, from wide-angle seismic and gravity data, doi
  17. (2001). Crustal structure of the outer Vøring Plateau, offshore Norway, from ocean bottom seismic and gravity data, doi
  18. (2002). Crustal structure of the southern part of the Vøring Basin, mid-Norway margin, from wide-angle seismic and gravity data, doi
  19. (1991). Crustal structure off Norway, 62 degrees to 70 degrees north, doi
  20. (2006). Crustal velocity structure of the British Isles; a comparison of receiver functions and wide-angle seismic data, doi
  21. (2003). Deep structure of the Armorican Basin (Bay of Biscay): a review of Norgasis seismic reflection and refraction data, doi
  22. (1993). Der europa¨ische Kontinentalsockel westlich von Irland abgeleitet aus tiefenseismischen Untersuchungen, Reihe C: Geophysik, Zentrum fur Meeres-und Klimaforschung der Universita¨t Hamburg.
  23. (1991). Geophysical evidence for early Permian igneous activity in a transtensional environment, doi
  24. (1997). Global sea floor topography from satellite altimetry and ship depth soundings, doi
  25. (1990). Gridding with continuous curvature splines in tension, doi
  26. (2002). Inversion and modelling of seismic data to assess the evolution of the Rockall Trough, PhD thesis.
  27. (2000). Joint inversion of wideangle seismic data and a deep reflection profile from the central North Sea, doi
  28. (2000). Lithospheric structure north of Scotland-I. P-wave modelling, deep reflection profiles and gravity, doi
  29. (1973). Long range profiles
  30. (1998). New improved version of Generic Mapping Tools released, doi
  31. (1971). PhD thesis.
  32. (1977). Seismic crustal study of the Oslo rift, doi
  33. (1988). Seismic signature and tectonic cross section of the Variscan crust in western France, doi
  34. (2002). Seismic velocity structure of the continental lithosphere from controlled source data, doi
  35. (1975). Structure of the crust beneath the Caledonian Foreland and Caledonian Belt of the north Scottish shelf region, doi
  36. (2007). The Authors, GJI, 171, 1172–1184 Journal compilation C©
  37. (1991). The BIRPS Atlas: Deep Seismic Reflection Profiles around the British Isles, doi
  38. (2005). The crustal structure and regional development of the Irish Atlantic margin region, doi
  39. (1974). The crustal structure beneath the Porcupine Ridge as determined by explosion seismology, Earth planet. doi
  40. (2006). the crustal velocity and density structure of northwest Europe: a 3D model and its implications for isostasy, PhD thesis.
  41. (1989). The Hatton Bank continental margin - III. Structure from wide-angle OBS and multichannel seismic refraction profiles, doi
  42. (1998). The Hatton Basin and continental margin: crustal structure from wide-angle seismic and gravity data, doi
  43. (1987). The PUMA experiment west of Lewis, doi
  44. (1988). The structure of the Rockall Trough from seismic refraction and wide-angle reflection measurements, doi
  45. (1995). The transition between the Erris and the Rockall basins: new evidence from wide-angle seismic data, doi
  46. (1998). Three-dimensional seismic refraction tomograC© doi
  47. (2004). Total sediment thickness of the World’s Oceans and Margin Seas, /http://wwww.ngdc.noaa.gov/mgg/ sedthick/sedthick.html.
  48. (2003). VARNET-96: three dimensional upper crustal velocity structure of SW Ireland, doi

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