Borehole Seismic Data

 

IODP logging contractor: USIO/LDEO

Hole: U1394B

Expedition: 340

Location: Lesser Antilles, off Montserrat (Caribbean Sea)

Latitude: 16° 38.4375' N

Longitude: 62° 2.2819' W

Logging date: March 13, 2012

Sea floor depth (driller's): 1125.6 m DRF

Sea floor depth (logger's): 1124 m WRF (HRLA/HLDS/MSS/EDTC-B/HNGS main)

Total penetration:  1307 m DRF 181.4 ( m DSF)

Total core recovered: 141.15 m ( 77.8 % of cored section)

Oldest sediment recovered: ~ 220 ka (forams)

Lithologies: Volcaniclastic turbidites, mixed volcaniclastic-bioclastic turbidites, hemipelagic sediments.

TOOL USED: WST (Well Seismic Tool), WST3 (3-Component Well Seismic Tool), VSI (Versatile Seismic Imager)

The logging data was recorded by Schlumberger in LDF/DLIS format. All processing, including first arrival picking and stacking, was performed by Schlumberger during Expedition . The data was then converted into SEGY format at USIO/LDEO, using tcode 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 Integrated Drilling Program, Expedition 340.

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