Borehole Seismic Data
Science operator: Texas A&M University
Location: Northern Carnarvon Basin (Tropical SE Indian Ocean)
Latitude: 18° 57.9190' S
Longitude: 117° 37.4340' E
Logging date: September 15-16, 2015
Sea floor depth (driller's): 156 m DRF
Sea floor depth (logger's): 158 m WRF (FMS/DSI/GPIT/EDTC/HNGS pass 2)
Total penetration: 686 m DRF (530 m DSF)
Total core recovered: 399.10 m (75.3 % of cored section)
Oldest sediment recovered: Late Miocene
Lithology: Wackestone, packstone, mudstone, rudstone and floatstone. Mudstone, dolostone, sand rich in glauconite and gravel towards the bottom of the hole.
SEISMIC TOOL USED: VSI (Versatile Seismic Imager)
The logging data was recorded by Schlumberger in LDF format. All processing, including first arrival picking and stacking, was performed by Schlumberger during Expedition 356. The data was then converted into SEGY format at USIO/LDEO, using code developed in house. Stacks are generally calculated with at least nine good traces.
In hole U1463B a total of 5 shots (1 station) were recorded at 585 m WRF (427 m WSF). The seismic data were of good quality. No further shots were acquired; VSP operations were interrupted due to mammal sightings.
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 356. 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:
E-mail: Cristina Broglia
E-mail: Gilles Guerin