Borehole Seismic Data

 

Science operator: Texas A&M University

Hole: U1562B

Expedition: 395C

Location: Bjorn Drift (Central North Atlantic Ocean)

Latitude: 60° 6.2993' N

Longitude: 26° 30.1026' W

Logging date: July 19-20, 2021

Sea floor depth (driller's): 2014.5 m DRF

Sea floor depth (logger's): 2015 m WRF

Total penetration: 2576 m DRF (561.5 m DSF)

Total core recovered: 153.4 m (47.6 % of cored section)

Oldest sediment recovered: 13.9 Ma

Lithology: Bioturbated sediments with low carbonate content (upper 150 m), increasing in the lower interval. Basalts with various degrees of alteration.

SEISMIC 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 395C. 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 395C.

For any question about the data or about the LogDB database, please contact LogDB support: logdb@ldeo.columbia.edu.