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Stevens, Duncan E.; Mcneill, Lisa C.; Henstock, Timothy J.; Delescluse, Matthias; Chamot-rooke, Nicolas; Bull, Jonathan M.. |
The equatorial eastern Indian Ocean hosts a diffuse plate boundary, where widespread deformation accommodates the relative motion between the Indian, Australian and Capricorn sub-plates. We integrate IODP Expedition 362 borehole data, which for the first time provides an accurate, ground-truthed chronostratigraphy of the sedimentary sequence east of the Ninety East Ridge (NER), with 2D seismic reflection profiles and multibeam bathymetry to assess the styles of faulting between the NER and the Sunda subduction zone, timing of activity and comparison with physical and rheological properties. We identify four distinct fault sets east of the NER in the northern Wharton Basin. N-S (350-010°) orientated faults, associated with the N-S fracture zones formed at... |
Tipo: Text |
Palavras-chave: Intraplate deformation; Indian Ocean; Diffuse plate boundary; IODP. |
Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00617/72936/71957.pdf |
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Dessa, Jean-xavier; Beslier, Marie-odile; Schenini, Laure; Chamot-rooke, Nicolas; Corradi, Nicolà; Delescluse, Matthias; Déverchère, Jacques; Larroque, Christophe; Sambolian, Serge; Canva, Albane; Operto, Stéphane; Ribodetti, Alessandra; Agurto-detzel, Hans; Bulois, Cédric; Chalumeau, Caroline; Combe, Laure. |
The north Ligurian margin is a complex geological area in many ways. It has witnessed several phases of highly contrasting deformation styles, at both crustal scale and that of shallower cover tectonics, simultaneously or in quick succession, and with significant spatial variability. This complex interplay is mirrored in the resulting intricate structures that make it hard to identify active faults responsible for both, the significant seismicity observed, and the tectonic inversion undergone by the margin, identified at longer time scales on morphostructural grounds. We present here the first preliminary results of the leg 1 of SEFASILS cruise, conducted in 2018 offshore Monaco, in an effort to answer these questions by means of modern deep seismic... |
Tipo: Text |
Palavras-chave: Western Mediterranean; Ligurian basin; Tectonic inversion; Salt tectonics; Crustal geophysical exploration; Multichannel seismic imaging; Wide-angle seismic recording. |
Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00615/72690/71694.pdf |
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