FN Archimer Export Format PT J TI A complete structural model and kinematic history for distributed deformation in the Wharton Basin BT AF Stevens, Duncan E. McNeill, Lisa C. Henstock, Timothy J. Delescluse, Matthias Chamot-Rooke, Nicolas Bull, Jonathan M. AS 1:1;2:1;3:1;4:2;5:2;6:1; FF 1:;2:;3:;4:;5:;6:; C1 Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, S014 3ZH, United Kingdom ENS Laboratoire de Géologie, CNRS UMR8538, PSL Research University, Paris, France C2 NOC, UK ENS, FRANCE IF 2.882 TC 9 UR https://archimer.ifremer.fr/doc/00617/72936/71957.pdf https://archimer.ifremer.fr/doc/00617/72936/71994.pdf LA English DT Article CR MD 116 / ANDAMAN BO Marion Dufresne DE ;intraplate deformation;Indian Ocean;diffuse plate boundary;IODP AB 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 the now extinct Wharton spreading centre, are still active and have been continuously active since at least 10 Ma. NNE- and WNW-trending fault fabrics develop between the fracture zones. The orientations and likely sense of displacement on these three sets of faults defines a Riedel shear system responding to ∼NNE-SSW left-lateral strike-slip activity at depth, demonstrated by the recent 2012 great intraplate earthquakes. We also find evidence of ∼NE-SW reverse faults, similar in style to E-W reverse faults observed west of the NER, where reverse faulting is more dominant. We show that the activity of this strike-slip system increased ca. 7-9 Ma, contemporaneous with reverse faulting and intraplate deformation west of the NER. PY 2020 PD MAY SO Earth And Planetary Science Letters SN 0012-821X PU Elsevier BV VL 538 UT 000525394900024 DI 10.1016/j.epsl.2020.116218 ID 72936 ER EF