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research
Fault‐controlled lithospheric detachment of the volcanic southern South Atlantic rift
Authors
Katharina Becker
Dieter Franke
Charlotte M. Krawczyk
David C. Tanner
Publication date
17 February 2016
Publisher
Doi
Cite
Abstract
© 2016. American Geophysical Union.We present structural models of two exemplary conjugate seismic lines of the southernmost South Atlantic margins to examine their initial evolution, especially the seaward‐dipping reflectors (SDRs). Modeling illustrates the different structure and inclination angles of the SDRs, which therefore require different subsidence histories. Since typical symmetrical subsidence models are not applicable, we suggest a model with a westward‐dipping detachment fault that offsets the SDRs on the South American margin and we speculate on passively subsided SDRs on the South African margin. We propose a simple‐shear rifting mechanism to explain the initial break‐up of the South Atlantic.DFG, 61089689, SPP 1375: SAMPLE: South Atlantic Margin Processes and Links with onshore Evolutio
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Last time updated on 15/12/2019