Crustal velocity structure off SW Taiwan in the northernmost South China Sea imaged from TAIGER OBS and MCS data

How the structural architecture of the Eurasian continental margin affects the structure, seismicity, and topography of the south central Taiwan fold‐and‐thrust belt

“…The crustal thickness of the shelf part of the Eurasian margin has been determined from a variety of geophysical data to be about 30 ± 5 km [ Yeh et al ., ; Kim et al ., ; Kuo‐Chen et al ., ; Huang et al ., ; Wu et al ., ; Chen et al ., ]. Reflection and wide‐angle seismic data show that the continental crust thins across the necking zone, from approximately 30 km of the shelf to approximately 18 km along the more than 300 km wide hyperextended, distal part of the margin (Figure ) [ Chen and Yang , ; Li et al ., ; Lin et al ., ; Huang et al ., ; Yeh et al ., ; Deng et al ., ; McIntosh et al ., , ; Lester et al ., ]. Yeh et al .…”

“…[] also interpret a failed rift to occur at the base of the slope (FR in Figure ) that projects on shore in southwestern Taiwan. The transition from continental to oceanic crust occurs to the south of the area shown in Figure [e.g., Nissen et al ., ; Zhao et al ., ; Tsai et al ., : Deng et al ., ; Yeh et al ., ; McIntosh et al ., ; Lester et al ., ].…”

A Rapid Numerical Method to Constrain 2D Focused Fluid Flow Rates Along Convergent Margins Using Dense BSR‐Based Temperature Field Data

“…The average porosity of both incoming sediments and final porosity of compacted sediments are constrained by porosity values derived from seismic velocities (Deng et al, 2012;Lester et al, 2013;McIntosh et al, 2013). We used Hamilton (1978) velocity-density relationship for marine sediments, which can be converted to velocity-porosity using the relation…”

“…We estimate the total fluid budget along three seismic transects that generally run east-west across Taiwan's accretionary prism using an approach adapted from Townend (1997) and Pecher et al (2010); these budget calculations are constrained by porosity values derived from published seismic velocities and the thickness of the sediment column above the decollement at the deformation front (Appendix C; Table C1). We use seismic line T2933 (EW9509-2933; McIntosh et al, 2013) and L10 (MGL0905-10; Deng et al, 2012) as representative transects for the initial-collision zone in the northern portion of the wedge, and used line L27 (MGL0905-27; Lester et al, 2013) to represent the subduction zone in the south.…”

“…Black dotted boxes indicate areas where regional average flow rates are calculated. Red lines denote the position of seismic transects; Deng et al (2012), McIntosh et al (2013), and Lester et al (2013) referred to in this paper.…”