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:
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 further questions about the logs, if the hole is still under moratorium please contact the staff scientist of the expedition.
After the moratorium period you may direct your questions to:
Cristina Broglia
Phone: 845-365-8343
Fax: 845-365-3182
E-mail: Cristina Broglia
Gilles Guerin
phone: 845-365-8671
fax: 845-365-3182
E-mail: Gilles Guerin