2-1-2 Expedition Report: IODP Exp.372 Creeping Gas Hydrate Slides and Hikurangi LWD

Abstract

International Ocean Discovery Program Expedition 372 combines two research topics: slow slip events in subduction areas and actively deforming gas hydrate-bearing landslides on Hikurangi Margin off the east coast of the north island of New Zealand. On Exp. 372, we conducted coring at one site (U1517) in the Tuaheni Landslide Complex and LWD at three sites (U1518, 1519, 1520) for subduction area aboard the R/V JOIDES Resolution from 26^th November in 2017 to 4^th January in 2018. We could core some gas hydrate layers, according to the chlorinity profile and core temperature measurement from U1517, gas hydrate saturation was 2-68% at 130-170mbsf.