Borehole Seismic Data

 

Science operator: Texas A&M University

Hole: U1521A

Expedition: 374

Location: West Antarctic Ice Sheet (Ross Sea)

Latitude: 75° 41.0351' S

Longitude: 179° 40.3108' W

Logging date: January 20-21, 2018

Sea floor depth (driller's): 573.0 m DRF

Sea floor depth (logger's): 572.0 m WRF

Total penetration: 1223.1 m DRF (650.1 m DSF)

Total core recovered: 411.50 m (63.3 % of cored section)

Oldest sediment recovered: Early Miocene

Lithology: Diatom-rich mud to diatom-bearing sandy mud, diatom-bearing diamictite, siliceous mudstone, sandy mudstone.

SEISMIC TOOL USED: VSI (Versatile Seismic Imager)

The logging data was recorded by Schlumberger in LDF/DLIS format. 96 good shots were acquired at 16 stations. All processing, including first arrival picking and stacking, was performed by Schlumberger during Expedition 374. The data was then converted into SEGY format at LDEO/BRG, 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 374.

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