Exp. 366 Mariana Convergent Margin

Expedition Information

Theme

Mariana Convergent Margin & South Chamorro Seamount

Proposal#505-Full5
Proposal#693-APL

Scientific Prospectus＞＞To be published

Expedition Schedule

30 Nov 2016 to 30 Jan 2017

Drilling Vessel

JOIDES Resolution

Ports

Guam/ TBD

Drilling Sites

Scientific Objectives

The IODP Mariana Convergent Margin Expedition (based on IODP proposals 505-Full5 and 693-APL) will investigate geochemical, tectonic, and biological processes at intermediate depths of an active subduction zone. This expedition will core the summits and flanks of serpentinite mud volcanoes on the forearc of the Mariana system, a non-accretionary convergent plate margin in the western Pacific. In addition, a reentry cone and casing system will be installed at three of these sites to provide the infrastructure for post-cruise installation of long-term monitoring; the existing Hole 1200C borehole observatory (CORK) will also be removed.

Sediments, rocks, and fluids recovered during this expedition will be used to (1) to understand mass transport and geochemical cycling in subduction zones of non-accretionary forearcs at convergent margins; (2) to ascertain spatial and temporal variability of slab-relate fluids in the forearc environment to trace dehydration, carbonate dissolution, and water/rock reactions in the subduction zone; (3) to understand physical properties of the subduction zone as controls over dehydration reactions and seismicity; (4) to study spatial and temporal variability in metamorphic and tectonic processes and the history of these processes in non-accretionary forearc regions; and (5) to investigate controls over biological activity associated with these mud volcano processes.

Study area

Go to the USIO Website

Co-chiefs

TBD

Science Party from J-DESC

Call for application