Synthetic seismograms are constructed from check shot-corrected velocity and density measurements collected during Ocean Drilling Program (ODP) Leg 180 at Sites 1109, 1115, and 1118. The synthetic seismograms facilitate direct correlation of a coincident multichannel seismic (MCS) profile with borehole data collected at the three sites. The MCS data and the synthetic seismograms correlate very well, with most major reflectors successfully reproduced in the synthetics. Our results enable a direct calibration of the MCS data in terms of age, paleoenvironment, and subsidence history. Seismic reflectors are time correlative within stratigraphic resolution but are often observed to result from different lithologies across strike. Our results facilitate the extrapolation of the sedimentation history into an unsampled section of Site 1118 and enable a full correlation between the three sites using all the data collected during ODP Leg 180. This study forms the foundation for regionalizing the site data to the northern margin of the Woodlark Basin, where the transition from continental rifting to seafloor spreading is taking place.
1Goodliffe, A.M., Taylor, B., and Karner, G., 2001. Correlations between seismic, logging, and core data from ODP Leg 180 sites in the western Woodlark Basin. In Huchon, P., Taylor, B., and Klaus, A. (Eds.), Proc. ODP, Sci. Results, 180 [Online]. Available from World Wide Web: <http://www-odp.tamu.edu/publications/180_SR/167/167.htm>. [Cited YYYY-MM-DD]
2School of Ocean and Earth Science and Technology, University of Hawaii at Manoa, 2525 Correa Road, Honolulu HI 96822-2285, USA. Correspondence author: andrew@soest.hawaii.edu
3Lamont-Doherty Earth Observatory, Columbia University, Route 9W, Palisades NY 10964, USA.
Initial receipt:
14 December 2000
Acceptance: 10 May 2001
Web publication: 27 August 2001
Ms 180SR-167