Borehole Seismic Data

Science operator: Texas A&M University

Hole: U1603D

Expedition: 400

Location: Greenland Glaciated Margin

Latitude: 72° 59.0506' N

Longitude: 62° 58.8735' W

Logging date: August 31, 2023

Sea floor depth (driller's): 1811.9 m DRF

Sea floor depth (logger's): 1811.0 m WRF

Total penetration: 2245.1 m DRF (433.2 m DSF)

Total core recovered: 43.31 m (28.4 % of cored section)

Oldest sediment recovered: Early PLeistocene

Lithology: Mud; muddy sand; interlaminated to interbedded mud and sand with clasts; mud and diamicton.

SEISMIC TOOL USED: VSI (Versatile Seismic Imager)

The logging data was recorded by Schlumberger in LDF/DLIS format. 58 good shots were acquired at 8 stations.
All processing, including first arrival picking and stacking as well as traces deconvolution and corridor stacks, was performed by Schlumberger during Expedition 400 (see the processing report). The data was then converted into SEGY format at LDEO/BRG, using code developed in house.

Stacks were generally calculated with at least five 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 400.

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