Evaluation and prediction of shear wave velocities in calcareous marine sediment and rocks

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doi: 10.1029/92JB00098
Author(s): Wilkens, Roy H.; Cheng, C. H.; Meredith, Jeffrey A.
Author Affiliation(s): Primary:
Univ. Hawaii, Sch. Ocean and Earth Sci. and Technol., Honolulu, HI, United States
Other:
Mass. Inst. Technol., United States
Volume Title: Journal of Geophysical Research
Source: Journal of Geophysical Research, 97(B6), p.9297-9305. Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0148-0227
Note: In English. Univ. Hawaii, Sch. Ocean and Earth Sci. and Technol., Contrib. No. 2800. 27 refs.; illus. incl. strat. col., sketch map
Summary: Shear wave velocities from full waveform acoustic logs recorded in calcareous oozes and chalks were determined using the spectral ratio inversion method. Data were recorded during DSDP Leg 95 drilling off the east coast of the United States. DSDP Site 613 sampled a progression of carbonaceous-siliceous oozes through partially lithified chalk. Discrete shear wave velocities within a 350 meter interval were calculated. The results of a method for predicting shear wave velocities using Wood's equation correlate well with inversion results at shear wave velocities greater than 800 m/sec. Predictions using Wood's equation provide a theoretical maximum value for shear wave velocity to compare with inversion results. Inverted data fall just below the predicted theoretical maximum value from Wood's equation and agree quite well with trends in Wood's results and other related logging measurements. At slower shear wave velocities the physical contrast between borehole fluid (drilling mud) and the formation (ooze) is not enough to excite normal borehole modes used in inversion processing, resulting in inversion velocities greater than Wood's maximum. Copyright 1992 by the American Geophysical Union.
Year of Publication: 1992
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 07 Marine Geology and Oceanography; 20 Geophysics, Applied; Acoustical logging; Atlantic Ocean; Baltimore Canyon trough; Body waves; Carbonate rocks; Carbonate sediments; Chalk; Clastic sediments; DSDP Site 613; Deep Sea Drilling Project; Elastic properties; Elastic waves; Geophysical surveys; IPOD; Interpretation; Leg 95; Marine sediments; North American Atlantic; Ooze; S-waves; Sedimentary rocks; Sediments; Seismic waves; Surveys; Velocity; Waveforms; Well-logging
Coordinates: N384600 N384930 W0723000 W0724700
Record ID: 1992031876
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute.