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CHIKYU MAIL NEWS Vol. 81, December 18th 2007

This mail news service provides you with information
about the Deep Sea Drilling Vessel "Chikyu" and
science and technology for the IODP Earth exploration.

CHIKYU HAKKEN WEB SITE
http://www.jamstec.go.jp/chikyu/
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IODP NanTroSEIZE Stage 1:
Expedition 315: NanTroSEIZE Megasplay Riser Pilot
Weekly Report #4
Date 14/Dec/2007
http://www.jamstec.go.jp/chikyu/eng/Expedition/NantroSEIZE/exp315_wr4.html

Having left the Site C0001, moved to the new location Site C0002.
After deployment of transponders, spud in the Hole C0002B in the
morning of 9 Dec. Jetted down to 50 meters below seafloor (mbsf),
then started drilling by RCB assembly with center bit.

After drilling to 475 mbsf, started coring. Drilled and cored to 1057
mbsf and cut more than 50 cores. Cores are routinely described,
measured and sampled by Science Party. Some non-routine
measurements for the discrete samples taken from the Hole C0001H
cores were also carried out.

At the Hole C0002B, we reached to the base of the Kumano
forearc Basin around 920 mbsf, and penetrated into the accretionary
prism. The accretionary prism rocks are characterized by scaly
fabric and systematic fractures, which has highly different looking
from the basin sediments above.

Site Summary Meeting for Site C0001 was held on 8 Dec.
End-of-Expedition Meeting was held on 11 Dec. Half of the Science
Party left the ship on 13 Dec, and half of the next (Exp 316)
Science Party came onboard. They were incorporated into
the current work shifts immediately, and cross-over between
two Science Parties is going on.
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Go to NanTroSEIZE Special Site:
http://www.jamstec.go.jp/chikyu/eng/CHIKYU/status.html

Go to Expedition 315 Photo Gallery:
http://www.jamstec.go.jp/chikyu/eng/Expedition/NantroSEIZE/exp315_pg.html

Invite your friend to subscribe the mail news:
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CHIKYU HAKKEN web site introduces you to every
aspect of the Deep Sea Drilling Vessel "Chikyu" and
science and technology for the IODP Earth exploration.
http://www.jamstec.go.jp/chikyu/

The Integrated Ocean Drilling Program (IODP) is an
international marine research drilling program dedicated
to advancing scientific understanding of the Earth by
monitoring and sampling sub seafloor environments.
IODP drilling operations aboard the Chikyu are managed by
JAMSTEC through CDEX, Japan Implementing Organization.
http://www.iodp.org

"CHIKYU HAKKEN" means Discover the Earth in Japanese.
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