Borehole Seismic Data


IODP logging contractor: USIO/LDEO

Hole: U1359D

Expedition: 318

Location: Wilkes Land Margin (Antarctic Ocean)

Latitude: 64° 54.2596' S

Longitude: 143° 57.5624 ' E

Logging date: February 22-23, 2010

Sea floor depth (driller's): 3023 m DRF

Sea floor depth (logger's): 3019.5 m WRF

Total penetration:  3625.2 m DRF (602.2 m DSF)

Total core recovered: 450 m ( 59.9 % of cored section)

Oldest sediment recovered: Middle Miocene

Lithology:  Diatomaceous silty claystones and finely-laminated claystones



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 318. 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 318. For further questions about the logs, please contact:


Gilles Guerin

phone: 845-365-8671

fax: 845-365-3182



Cristina Broglia

Phone: 845-365-8343

Fax: 845-365-3182