Biomass of subseafloor microbial life is at least comparable to that in the oceans. The massive buried biosphere plays an important on a global scale, in carbon sequestration, element cycles, and Earth's evolution. In 2012, IODP Expedition 337 unveiled the presence of microbial life at almost 2.5 km below the sea floor (Inagaki et al. 2015). But a central question of deep biosphere community remained unsolved; what is the vertical extent of the habitable zone on Earth, and by inference, the factors that limit life’s maximum depths?
IODP Expedition 370, T-Limit of the Deep Biosphere off Muroto, will tackle this question by drilling through the sediments in the central Nankai Trough off Japan. Anomalously high heat flow regimes in this area result in temperatures of about 130°C at the sediment/basement interface (1210 mbsf), and make the site ideal target for an in-depth examination of subseafloor microbial life close its upper temperature limit.
- Expedition movie is now online!
- T-Limit of the Deep Biosphere off Muroto: all operation completed The shore-based team of the T-Limit successfully completed their activity at Kochi Core Center on November 23. The team analyzed the samples, which were transported by 44 helicopter flights from Chikyu immediately following sample collection and initial processing onboard. The concurrent scientific operation between the two teams, for the first time in Chikyu’s IODP expedition, enabled the analysis of fresh samples with the state-of-the-art facilities. Although this is the end of all T-Limit operation, there are many of more detailed scientific analysis planned. These results will be published in IODP report and in scientific journals. Related press release: International Ocean Discovery Program Expedition 370 “T-Limit of the Deep Biosphere off Muroto” Completed
- Chikyu arrived at the Kochi New Port at 9:00 am.
Talk event was held in Kochi Prefecture
“T-Limit” project was featured with Chikyu live broadcast during the event at KCC with over 1,000 people in attendance.
- T-Limit shipboard team was featured in New Scientist Live event.
Live talk from the Chikyu Questions from audience
- Chikyu departed Shimizu port at 9:00 am.
- Press release Start of T-Limit has been officially announced as a press release. Following the press release, the "Science Party" web page is now open.
- T-Limit was featured in Chikyu open ship event
During the Chikyu open ship event at Ishinomaki, T-Limit was featured in the onboard exhibition. More than 3000 visitors enjoyed the tour on the ship.
- Call for Shipboard Outreach Staff
CDEX invites Shipboard Outreach Staff to spend an entire expedition with an IODP Expedition 370 shipboard party. This program provides educators, artists, writers, videographers and other participants with an opportunity to translate their experiences for students and the general public via blogs, videos, social networking sites, live ship-to-shore video events and development of educational resources. Shipboard Outreach Staff will be selected through a competitive application and interview process and CDEX welcomes applications from formal and informal educators at all levels, as well as creative individuals who have a passion for IODP and the skills and potential to increase the profile of the program in the public eye. The application deadline is July 18.
More details and application form are available for download.
- "Scientific Prospectus published"
Full version of scientific prospectus is now published online.
- "T-Limit" Project Workshop aboard Chikyu on June 25 IODP "T-Limit" Project Workshop - Expedition 370: T-Limit of the Deep Biosphere off Muroto - is going to be held aboard Chikyu on June 25th, 2016. This workshop is funded by Deep Carbon Observatory and is open to all scientists considering contribution to the expedition. Scientists interested in participating in this workshop can get more information and apply to participate through the DCO workshop webpage
- Drs. Verena Heuer, Fumio Inagaki and Yuki Morono serve on Expedition 370 as Co-chief Scientists. Three co-chief scientists officially accepted the invitation of CDEX to serve on the IODP Expedition 370: Dr. Verena Heuer (MARUM, Univ. Bremen) is an organic geochemist who has been working on biogeochemical processes in the deep subseafloor biosphere. Dr. Heuer has a lot of field-based research experiences, including IODP Expeditions 301 and 311 on the JOIDES Resolution, 322 and 337 on the Chikyu, and is interested in biogeochemical carbon and other elemental cycles. Dr. Fumio Inagaki (KCC/ODS, JAMSTEC) is a geomicrobiologist who has also sailed in scientific ocean drilling many times as a shipboard scientist (ODP Leg 201, IODP Expeditions 301 and 316) and a co-chief scientist (Expeditions 329 and 337), and is the first AGU Taira Prize recipient in 2015 for the contribution to the deep-biosphere frontier research. Dr. Yuki Morono (KCC, JAMSTEC) is a geomicrobiologist, who participated in IODP Expeditions 329, 337 and 357. Dr. Morono has been long working on microbiological techniques such as cell detection and enumeration at low-biomass core samples, and is going to be a leader of the shore-based team of the science party. These three co-chief scientists, nominated by the Project Coordination Team (PCT), will lead the science party of Expedition 370.
- Site Open
Expedition movie is now online!
Chikyu arrived at the Kochi New Port.
"Blog" page is now open
"Daily Report" page is now open
"Science Party" page is now open
"Chikyu open ship"
"Science" page is now open
Call for Shipboard Outreach Staff
Scientific Prospectus published
"T-Limit" Project Workshop aboard Chikyu on June 25
Drs. Verena Heuer, Fumio Inagaki and Yuki Morono serve on Expedition 370 as Co-chief Scientists.