Proc. IODP, 343/343T, Expedition 343/343T summary

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Chapter contents Abstract Introduction Background Geological setting Seismic studies/Site survey Scientific objectives and operational strategy Strategy/Drilling plan Principal results/Site summaries Site C0019 Preliminary scientific assessment Objective 1: identify and sample the fault that ruptured during the Tohoku-oki earthquake Objective 2: what was the stress state on the fault that controls rupture during the earthquake and was the stress completely released? Objective 3: what are the characteristics of large earthquakes in the fault zone, and how can we distinguish present and past events in fault zone cores? References Figures F1. Location map. F2. Seismic Line HD33B. F3. JFAST site map. F4. Graphical summary of operations. F5. Primary geophysical logs. F6. Structural domains. F7. Borehole breakout orientation. F8. Temperature sensor distribution. F9. Cored interval lithology. F10. Core-log-seismic integration. Table T1. Coring summary. PDF file			Previous \| Next doi:10.2204/iodp.proc.343343T.101.2013 Strategy/Drilling plan Details regarding the original drilling plan are available in Mori et al. (2012), but the general planned sequence of drilling was as follows: Drilling the pilot hole with logging while drilling (LWD)/measurement while drilling (MWD) to total depth (TD), planned for ~900 mbsf; Running casing and a completion assembly (including long-term temperature monitoring with a string of autonomous data loggers) in the LWD/MWD hole to ~900 mbsf (casing to 50 m below fault, ~900 m); Drilling a second hole with the rotary core barrel (RCB) and center bit to ~500 mbsf and continuation with RCB coring to ~900 mbsf; and Running casing and a completion assembly for the second hole (including long-term temperature and pressure monitoring with the telemetered sensor string) to ~900 mbsf (casing to 50 m below fault, ~900 m). Top of page \| Previous \| Next

Strategy/Drilling plan