Borehole Seismic Data Processing

ODP logging contractor: LDEO-BRG

Hole: 735B

Leg: 176

Location: SW Indian Ridge (SW Indian Ocean)

Latitude: 32° 43.395' S

Longitude: 57° 15.959' E

Logging date: October -December, 1997

Water depth (from Leg 118): 731 mbrf

Total penetration: 1508 mbsf

Total core recovered: 865.99 m (86.3 %)

TOOL USED: BGKT (Vertical Seismic Profile Tool).

The logging data was recorded by Schlumberger in DLIS format. All processing, including first arrival picking and stacking, was performed by Schlumberger during Leg 176. The data was then converted into SEGY format at the Borehole Research Group of the Lamont-Doherty Earth Observatory, using the SEGY Save module in GeoFrame.

Stacks are generally calculated with at least seven good traces.

All the data in the SEGY files are sorted shot by shot (i.e. chronologically).

Gilles Guerin

Phone: 845-365-8671

Fax: 845-365-3182

E-mail: Gilles Guerin

Cristina Broglia

Phone: 845-365-8343

Fax: 845-365-3182

E-mail: Cristina Broglia