Correlation of 3.5 kHz Acoustic Penetration and Deposition/Erosion in the Argentine Basin: A Note.

摘要

The 3.5 kHz Profiles show that sediments in the Argentine Basin have acoustic penetrations ranging from 0 to >300 ms. The acoustically opaque sand- and silt-rich sediments on the proximal abyssal plain seaward of the Rio de la Plata appear to be winnowed by the Antarctic Bottom Water as it flows north. The northern and eastern parts of this gyre, however, appear to be depositional, explaining the acoustically transparent sediments on the southern slopes of the Rio Grande Rise and the Ewing-Argyro-Zapiola Drifts. Over the past 40 years, echo-sounding and seismic profiles have been used to map deep sea seafloor morphology, sediment distribution. Keywords: Reprints. (KR)