Proposed ocean drilling sites and locations of multi-channel seismic reflection profiles. (IMAGE)
Caption
Red and orange circles represent the locations of designed and alternate sites, respectively. Red stars mark the DSDP 293 drill hole. Yellow thick solid lines denote deep seismic refraction profiles; the OBS2022-1 profile is highlighted by a white thick solid line. Black thin solid lines indicate multi-channel seismic reflection profiles acquired by the Guangzhou Marine Geological Survey, China Geological Survey. The red thin solid lines represent multi-channel seismic reflection profiles from TAIGER program. The MCS808-1 profile is from Hsu et al. (2021). Green diamonds denote the trawl sites of RD19 and RD20. The gray arrow shows the direction and velocity of plate motion (Hsu et al., 2016). (b)–(e) show designed sites A, B, C and D along multi-channel seismic profiles, with identical vertical and horizontal scales. The sedimentary sequence division of the Huatung Basin in (b) is the same as that in Fig. 4. Black solid lines with red drilling towers mark the positions of designed drill holes on the profiles.
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