From Rifting to Spreading: The Proto-Oceanic Crust
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The sequence of processes that lead from continental rifting to oceanic drifting during the genesis of passive margins remains debated. Wide-angle seismics has, over the past decades, proven an efficient tool to image the architecture and to quantify the acoustic velocity of continental margins. These data, combined with structural interpretation and stratigraphic/kinematic/mechanical numerical modeling, have led to better characterization of the crustal and mantellic processes active from rifting to drifting. The Protoc project is focused on the accretion of proto-oceanic crust that occurs before the more homogeneous and stable oceanic drift.
KeywordsProto-oceanic crust Passive margins Wide-angle seismics
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