Borehole Seismic Data
IODP drilling and logging
operator: CDEX
Hole: C0020A
Expedition: 337
Location: Offshore Shimokita Peninsula (Japan Sea)
Latitude: 41° 10.5983' N
Longitude: 142° 12.0328' E
Logging date:
Sea floor
depth (driller's):
1208.5 m DRF
Sea floor
depth (logger's):
1208.5 m WRF
Total
penetration: 3674.5 m DRF ( 2466 m DSF)
Total core
recovered: 198.4 m (75.3 % of the 263.5 m cored interval)
Oldest sediment recovered: Oligocene-Early Miocene
Lithologies: Diatom-rich silty clay, shale, sandstone, siltstone, coal-rich horizons
TOOL USED: VSI-C (Versatile
Seismic Imager-C)
The logging data
was recorded by Schlumberger in LDF format. All processing, including first
arrival picking and stacking, was performed by Schlumberger during
Expedition 337. The data was then
converted into SEGY format at LDEO, using code developed in house.
Stacks are
generally calculated with at least nine good traces.
All the data in
the SEGY files are sorted shot by shot (i.e. chronologically).
Additional information about the drilling and logging operations can be found in the Operations and Downhole Measurements sections of the expedition report, Proceedings of the International Ocean Discovery Program, Expedition 337.
For questions about the online database please contact:
Cristina Broglia
Phone: 845-365-8343
Fax: 845-365-3182
E-mail: Cristina Broglia
Gilles Guerin
phone: 845-365-8671
fax: 845-365-3182
E-mail: Gilles Guerin
For questions about the logs, please contact:
Yoshinori Sanada
E-mail: sanada@jamstec.go.jp
Yukari Kido
Email: ykido@jamstec.go.jp
Yuichi Shinmoto:
Email: shinmoto@jamstec.go.jp