| Summary: | American Geophysical Union (AGU) Fall Meeting, 13-17 December 2021, New Orleans 2D modelling of free-air satellite gravity and shipborne magnetic data was implemented to constrain the crustal structure and location of igneous intrusions in the crust in the Hatton Basin, along 2D multichannel seismic reflection profiles acquired in 2013/2014. The seismic lines extend from the Iceland Basin to the Charlie-Gibbs Fracture Zone, across the Hatton Continental Margin. A forward modelling approach was undertaken for the gravity and magnetic modelling, with the help of the GM-SYS software package. Modelling was constrained by the interpretation of the multichannel seismic data and previous geological and geophysical studies. The results are consistent with previous wide-angle seismic studies imaging the deep-crustal structure of stretched continental crust and its transition through the continent-ocean boundary into the oceanic crustal domain. The current study provides a better understanding of tectonic extension and the role of magmatism in the development of magma-rich passive rifted continental margins. Moreover, the results offer new, detailed information on the depth to basement and sediment thickness in the study area, as well as Moho depths, which enables the refinement of global data sets and therefore will improve the accuracy of future geophysical studies. 3D gravity inversion is being performed using the results obtained in this study to further constrain Moho depths in the area. The outcome of the inversion will be compared to the results obtained by 2D gravity-magnetic modelling to assess the accuracy and limitations of both methods. This publication has emanated from research supported in part by a research grant from Science Foundation Ireland (SFI) under Grant Number 13/RC/2092 and co-funded under the European Regional Development Fund and by PIPCO RSG and its member companies Peer reviewed
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