Objective The development of continental rifting and seafloor spreading can be predominated by magmatic upwelling(magma-rich)or tectonic stretching(magma-poor).Located in the terminal portion of propagating seafloor spreading of the South China Sea(SCS),the southwestern mid-ridge of the southwest sub-basin(SWSB)of the
Objective Dongsha waters are poorly studied for gas hydrates.Previous multi-channel seismic reflection and Chirp subbottom profiles show that numerous submarine mounds stand up to 100 m high above the seafloor over the continental slope of the SW Dongsha Island in northern margin of the South China Sea(SCS).These mounds
