Standard Wireline Data Processing
DSDP operator and logging contractor: Scripps Institution of Oceanography
Hole: 3
Leg: 1
Location: Sigsbee Abyssal Plain (Gulf of Mexico)
Latitude: 23° 1.8' N
Longitude: 92° 2.6' W
Logging date: August 21-23, 1968
Sea floor depth (sea level, echo-sounding, corrected): 2742.2 mbsl
Sea floor depth (from logs): no log reached the sea floor
Total penetration: 627.6 mbsf
Total core recovered: 46.9 m (48.1 % of cored section)
Oldest sediment cored: Pleistocene
Lithologies: mudstone
Tool string | Pass | Top depth (mbsf) | Bottom depth (mbsf) | Bit depth (mbsf) | Notes |
1. EL |
Uplog
|
174.8
|
482.8
|
Recorded openhole |
|
The depths in the table are for the processed logs (after depth shift to the sea floor).
Depth shift
to sea floor. The water depth was inferred
from the depth corrected for sound velocity and transponder depth, as reported
in the DSDP Reports. Neither "bottom felt" depth, however, or information about
the distance between the rig floor and the sea level were provided in the
report. Ten meters have been added to the provided depth to account for this
distance. In conclusion, the logs have been shifted 3752.m.
The quality of the data is assessed by checking against reasonable values for the logged lithologiess, by repeatability between different passes of the same tool, and by correspondence between logs affected by the same formation property (e.g. the resistivity log should show similar features to the sonic velocity or density log). At Hole 3 only one log was recorded, which exhibits a very uniform character.
No hole diameter measurement was performed in Hole 1.
A null value of -999.25 may replace invalid log values.
Additional information about the drilling and logging operation can be found in the Operations section of the Site Chapter in DSDP Initial Reports volume 1. For further questions about the logs, please contact:
Cristina Broglia
Phone: 845-365-8343
Fax: 845-365-3182
E-mail: Cristina Broglia