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doi:10.2204/iodp.proc.341.204.2017

Data report: core-log-seismic integration and time-depth relationships at IODP Expedition 341 Southern Alaska Margin Sites U1420 and U1421, Bering Trough, Gulf of Alaska¹

Wesley A. Clary,² Lindsay L. Worthington,² Angela L. Slagle,³ and Hugh Daigle⁴

Abstract

We present a time-depth relationship for Integrated Ocean Drilling Program (IODP) Expedition 341 Southern Alaska Margin Sites U1420 and U1421 using high-resolution multichannel seismic, core, and logging data. Calibrating and combining core and logging data at each site minimizes data gaps in physical properties information. Remaining data gaps were interpolated using spline fitting in order to provide continuous estimates of bulk density and compressional wave velocity for the full drilled interval. We use the interpolated physical property curves for bulk density and compressional wave velocity at each site to generate synthetic seismic traces. At Site U1421, vertical seismic profiling further constrained the time-depth relationship and was used to calibrate the velocity curve and provide input for the initial velocity model during the tie. Finally, we matched simulated reflectors in the synthetic trace with events in the nearby seismic traces and established a time-depth relationship at each site.

¹ Clary, W.A., Worthington, L.L., Slagle, A.L., and Daigle, H., 2017. Data report: core-log-seismic integration and time-depth relationships at IODP Expedition 341 Southern Alaska Margin Sites U1420 and U1421, Bering Trough, Gulf of Alaska. In Jaeger, J.M., Gulick, S.P.S., LeVay, L.J., and the Expedition 341 Scientists, Proceedings of the Integrated Ocean Drilling Program, 341: College Station, TX (Integrated Ocean Drilling Program). doi:10.2204/iodp.proc.341.204.2017

² Department of Earth and Planetary Sciences, University of New Mexico, 221 Yale Boulevard NE, Albuquerque NM 87131-0001, USA. Correspondence author: wesclary@unm.edu

³ Lamont-Doherty Earth Observatory, Columbia University, 212A Borehole, Palisades NY 10964-8000, USA.

⁴ Department of Petroleum and Geosystems Engineering, University of Texas, 200 East Dean Keeton Street, Stop C0300, Austin TX 78712-1585, USA.

Initial receipt: 31 August 2016
Acceptance: 15 April 2017
Publication: 28 June 2017
MS 341-204

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