Home > Press Releases > details

Press Releases

July 25, 2017

International Ocean Discovery Program Expeditions 371 to Start:
“Tasman Frontier Subduction Initiation and Paleogene Climate”

The International Ocean Discovery Program (IODP*1) will begin Expedition 371, “Tasman Frontier Subduction Initiation and Paleogene Climate” by the JOIDES Resolution*2 on July 27.

This scientific expedition will core and log Paleogene and Neogene sediment sequences from boreholes in the Norfolk Ridge, New Caledonia Trough, Lord Howe Rise and Tasman Abyssal Plain (figure 1). It aims to elucidate the Paleogene sequence of tectonic events west of Norfolk Ridge that was associated with Tonga-Kermadec subduction initiation started at ~50 Ma and to understand if there is any relationship between paleogeographic changes due to the subduction initiation and anomalous regional warmth.

A total of 29 partcipating members include three scientists from Japan, and those from the U.S., European countries, New Zealand, China, South Korea and Brazil.

For more details, please refer to International Ocean Discovery Program Expeditions 371 at http://iodp.tamu.edu/scienceops/expeditions/tasman_frontier_subduction_climate.html

*1 International Ocean Discovery Program (IODP)
The International Ocean Discovery Program (IODP) is a multinational cooperative project that started in October 2013. The scientific drilling vessel D/V Chikyu, operated by Japan, and the JOIDES Resolution, operated by the U.S., are utilized for expeditions. There is also an option to charter mission-specific platforms from European countries. The mission of the IODP is to shed light on global environmental changes, the earth’s mantle and crustal dynamics and tectonics, and the biosphere beneath the seafloor. It took over the Integrated Ocean Drilling Program carried out from October 2003 to 2013.

JOIDES Resolution ©IODP

*2 The JOIDES Resolution is the U.S. drilling vessel that participates in the IODP. Compared to the scientific deep-sea drilling vessel, the Chikyu by JAMSTEC, the JOIDES Resolution is used more often for drilling in shallow waters.

Figure 1
Figure 1. Planned drilling sites in this expedition (©IODP)
Table 1. Overview of Drilling Sites (order of drilling)
Site Water depth Depth of penetration Estimated time
 at site
LHRN-3A 1,505m 320m 2.0
NCTN-8A 3,584m 700m 12.1
REIS-2A 1,581m 900m 8.1
NCTS-2A 2,924m 610m 9.7
LHRS-3A 1,250m 620m 6.5
TASS-2A 4,858m 960m 7.1


(For IODP and this expedition)
Kae Takahashi, Research Support Division I, Research Support Department
(For press release)
Tsuyoshi Noguchi, Manager, Press Division, Public Relations Department
Inquiry Form