Downloaded from http://sp.lyellcollection.org/ by guest on September 27, 2021 Moho and basement depth in the NE Atlantic Ocean based on seismic refraction data and receiver functions THOMAS FUNCK1*, WOLFRAM H. GEISSLER2, GEOFFREY S. KIMBELL3, SOFIE GRADMANN4,O¨ GMUNDUR ERLENDSSON5, KENNETH MCDERMOTT6 & UNI K. PETERSEN7 1Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 Copenhagen K, Denmark 2Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Am Alten Hafen 26, 27568 Bremerhaven, Germany 3British Geological Survey, Keyworth, Nottingham NG12 5GG, UK 4Geological Survey of Norway, Leiv Eirikssons vei 39, 7040 Trondheim, Norway 5Iceland Geosurvey, Grensa´svegi 9, 108 Reykjavı´k, Iceland 6UCD School of Geological Sciences, University College Dublin, Belfield, Dublin 4, Ireland 7Faroese Earth and Energy Directorate, Brekkutu´n 1, 110 To´rshavn, Faroe Islands *Correspondence:
[email protected] 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 recon- structions 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.