@article {eakin_crustal-scale_2014, title = {Crustal-scale seismic profiles across the Manila subduction zone: The transition from intraoceanic subduction to incipient collision}, journal = {Journal of Geophysical Research: Solid Earth}, volume = {119}, number = {1}, year = {2014}, note = {_eprint: https://onlinelibrary.wiley.com/doi/pdf/10.1002/2013JB010395}, pages = {1{\textendash}17}, abstract = {AbstractWe use offshore multichannel seismic (MCS) reflection and wide-angle seismic data sets to model the velocity structure of the incipient arc-continent collision along two trench perpendicular transects in the Bashi Strait between Taiwan and Luzon. This area represents a transition from a tectonic regime dominated by subduction of oceanic crust of the South China Sea, west of the Philippines, to one dominated by subduction and eventual collision of rifted Chinese continental crust with the Luzon volcanic arc culminating in the Taiwan orogeny. The new seismic velocity models show evidence for extended to hyperextended continental crust, 10{\textendash}15 km thick, subducting along the Manila trench at 20.5{\textdegree}N along transect T1, as well as evidence indicating that this thinned continental crust is being structurally underplated to the accretionary prism at 21.5{\textdegree}N along transect T2, but not along T1 to the south. Coincident MCS reflection imaging shows highly stretched and faulted crust west of the trench along both transects and what appears to be a midcrustal detachment along transect T2, a potential zone of weakness that may be exploited by accretionary processes during subduction. An additional seismic reflection transect south of T1 shows subduction of normal ocean crust at the Manila trench.}, keywords = {accretion, collision, rifted margin, subduction, Taiwan}, issn = {2169-9356}, doi = {10.1002/2013JB010395}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/2013JB010395}, author = {Eakin, Daniel H. and McIntosh, Kirk D. and Van Avendonk, H. J. A. and Lavier, Luc and Lester, Ryan and Liu, Char-Shine and Lee, Chao-Shing} } @article {mcintosh_inversion_2013, title = {Inversion of a hyper-extended rifted margin in the southern Central Range of Taiwan}, journal = {Geology}, volume = {41}, number = {8}, year = {2013}, month = {aug}, pages = {871{\textendash}874}, abstract = {Seismic reflection and wide-angle data acquired across, south, and west of Taiwan show that extended to hyper-extended continental crust of the Chinese continental margin is present more than 200 km south of the shelf and is subducting at the Manila Trench. Furthermore, crustal-scale tomographic velocity models show that this crust is underthrusted to \~{}15 km depth below the accretionary prism, where it then is structurally underplated to the base of the prism. We document an increasing volume of accreted crust from south to north, and in our northern transect high-velocity material of the accretionary prism can be directly linked to outcrops of Central Range basement rocks. In map view the Central Range of Taiwan is clearly contiguous with the Hengchun Peninsula and Hengchun submarine ridge to the south. Accordingly, we propose a new model in which the Central Range forms directly from the accretionary prism, including the basement core, which originates from subducted, and then accreted, extended to hyper-extended continental crust.}, issn = {0091-7613}, doi = {10.1130/G34402.1}, url = {https://doi.org/10.1130/G34402.1}, author = {McIntosh, Kirk and van Avendonk, Harm and Lavier, Luc and Lester, W. Ryan and Eakin, Daniel and Wu, Francis and Liu, Char-Shine and Lee, Chao-Shing} }