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: Sep 9-14, 2012
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.
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