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Oceanography and Atmospheric Sciences and Meteorology
Applied Anisotropy; biogenic structures; bioturbation; body waves; calcareous composition; carbonate rocks; chalk; clastic sediments; elastic waves; Leg 130; measurement; Ocean Drilling Program; Ontong Java Plateau; ooze; P-waves; Pacific Ocean; sedimentary rocks; sedimentary structures; sediments; seismic waves; transition zones; velocity; West Pacific
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Velocity Anisotropy In Calcareous Sediments From Leg 130, Ontong Java Plateau, Frank Bassinot, Janice C. Marsters, Larry A. Mayer, Roy H. Wilkens
Velocity Anisotropy In Calcareous Sediments From Leg 130, Ontong Java Plateau, Frank Bassinot, Janice C. Marsters, Larry A. Mayer, Roy H. Wilkens
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During Leg 130, an intensive program of P-wave velocity measurements was conducted on calcareous sediments of varying induration (ranging from ooze to limestone) that cover the Ontong Java Plateau (west equatorial Pacific). The high quantity and quality of shipboard acoustical property measurements seemed to be particularly appropriate for gaining a better understanding of acoustic anisotropy in calcareous sediments. Major results can be summarized as follows: 1. In calcareous oozes, acoustic anisotropy exists even at shallow depths of burial. Values are low, ranging from -0.5% to 3.5% and averaging 1.2%. Anisotropy profiles are affected by coring disturbances, but they still roughly …