Borehole Seismic Data

 

Science operator: Texas A&M University

Hole: U1522A

Expedition: 374

Location: West Antarctic Ice Sheet (Ross Sea)

Latitude: 76° 33.2262' S

Longitude: 174° 45.4652' W

Logging date: January 27-28, 2018

Sea floor depth (driller's): 568.5 m DRF

Sea floor depth (logger's): 568.0 m WRF

Total penetration: 1270.3 m DRF (701.8 m DSF)

Total core recovered: 279.57 m (39.8 % of cored section)

Oldest sediment recovered: Late Miocene

Lithology:  Massive clast-rich muddy to sandy diamict and clast-poor sandy diamictite

SEISMIC TOOL USED: VSI (Versatile Seismic Imager)

The logging data was recorded by Schlumberger in LDF/DLIS format. 53 good shots were acquired at 8 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.