Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions

Thomas Funck, Wolfram H. Geissler, Geoffrey S. Kimbell, Sofie Gradmann, Ögmundur Erlendsson, Kenneth McDermott, Uni K. Petersen

Research output: Chapter in Book/Report/Conference proceedingChapter in bookResearchpeer-review

39 Citations (Scopus)

Abstract

Seismic refraction data and results from receiver functions were used to compile the depth to the basement and Moho in the NE Atlantic Ocean. For interpolation between the unevenly spaced data points, the kriging technique was used. Free-air gravity data were used as constraints in the kriging process for the basement. That way, structures with little or no seismic coverage are still presented on the basement map, in particular the basins off East Greenland. The rift basins off NW Europe are mapped as a continuous zone with basement depths of between 5 and 15 km. Maximum basement depths off NE Greenland are 8 km, but these are probably underestimated. Plate reconstructions for Chron C24 (c. 54 Ma) suggest that the poorly known Ammassalik Basin off SE Greenland may correlate with the northern termination of the Hatton Basin at the conjugate margin. The most prominent feature on the Moho map is the Greenland-Iceland-Faroe Ridge, with Moho depths > 28 km. Crustal thickness is compiled from the Moho and basement depths. The oceanic crust displays an increased thickness close to the volcanic margins affected by the Iceland plume.

Original languageEnglish
Title of host publicationThe NE Atlantic Region: A reappraisal of crustal structure, tectonostratigraphy and magmatic evolution
EditorsG. Péron-Pindvidic, J.R. Hopper, T. Funck, M.S. Stoker, C. Gaina, J.C. Doornenbal, U.E. Árting
Place of PublicationLondon
PublisherGeological Society of London
Pages207-231
Number of pages25
ISBN (Print)978-1-78620-278-9
DOIs
Publication statusPublished - 2017

Publication series

SeriesGeological Society Special Publications
Volume447
ISSN0305-8719

Programme Area

  • Programme Area 3: Energy Resources

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