Borehole Seismic Data
IODP logging contractor: USIO/LDEO
Hole: U1338B
Expedition: 321
Location: Equatorial Pacific Sediment Mound (NE Equatorial Pacific)
Latitude: 2° 30.4692 ' N
Longitude: 117° 58.1736 ' W
Logging date: June 9-11, 2009
Sea floor depth (driller's): 4209.9 m DRF
Sea floor depth (logger's): 4207.5 m WRF (DIT/HLDS/GPIT/HNGS downlog)
Sea floor depth (logger's): 4207.5 m WRF (VSI/SGT uplog)
Sea floor depth (logger's): 4208.7 m WRF (FMS/DSI/GPIT/HNGS pass 2)
Total penetration: 416.1 m DSF
Total core recovered: 417.34 m (101 % of cored section)
Oldest sediment recovered: Lower Miocene
Lithologies: Carbonate muds, nannofossil oozes, diatom oozes, laminated and bioturbated muds.
TOOL USED: VSI (Versatile
Seismic Imager)
The logging data
was recorded by Schlumberger in LDF format. All processing, including first
arrival picking and stacking, was performed by Schlumberger during
Expedition 321. The data was then
converted into SEGY format at USIO/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 Integrated Drilling Program, Expedition 321.
For further questions about the logs, please contact:
Gilles Guerin
Phone: 845-365-8671
Fax: 845-365-3182
E-mail: Gilles Guerin
Cristina Broglia
Phone: 845-365-8343
Fax: 845-365-3182
E-mail: Cristina Broglia