Borehole Seismic Data
IODP logging contractor: USIO/LDEO
Hole: U1437D
Expedition: 350
Location: Izu-Bonin-Mariana Rear Arc (Philippine Sea)
Latitude: 31° 47.3874' N
Longitude: 139° 01.5723' E
Logging date: April 21-23, 2014
Sea floor depth (driller’s): 2127.3 m DRF
Sea floor depth (logger's): 2126.5 m WRF (MSS/HRLA/APS/HLDS/EDTC-B/HNGS Main Run)
Total penetration (RCB coring): 3107.7 m DRF (980.4 m DSF) .
Total core recovered: 78 m ( 78 % of cored interval). Upper 440 m cored in hole B (55% recovery).
Oldest sediment recovered: 6 Ma, Upper Miocene (from paleomagnetic measurements. All microfossils
recovered are too reworked for proper biostratigraphic identification)
Lithology: Mud with dispersed ash, intercalated intervals of mafic and evolved ash, tuff, tuffaceous mudstone.
TOOL USED: VSI (Versatile
Seismic Imager)
The logging data
was recorded by Schlumberger in LDF/DLIS format. All processing, including first
arrival picking and stacking, was performed by Schlumberger during
Expedition . The data was then
converted into SEGY format at USIO/LDEO, using tcode 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 350.
For further questions about the logs, please contact:
Gilles Guerin
phone: 845-365-8671
fax: 845-365-3182
E-mail: Gilles Guerin
Phone: 845-365-8343
Fax: 845-365-3182
E-mail: Cristina Broglia