Cruise Report: Mariana Leg 10.
Abstract
The primary scientific goal of leg 10 of Mariana Expedition was to make a set of measurements in the thick sedimentary section of the Bengal Fan that would make it possible to calculate the attenuation of sound as a function of depth in the sediments. The Bengal Fan was chosen as the location for the study because it contains the thickest section of fan sediments in the ocean, and previous studies by Curray and Raitt have shown that the Sedimentary section has few sharp velocity discontinuities. The types of measurements required were of two types: multichannel seismic reflection measurements and 'diving wave' studies of waves continuously refracted through the sedimentary column from deep sources to receivers located at the sea floor. Additional observations taken to provide environmental data and to make use of the available ship time on the transit to and from the primary working area including sonobuoy/airgun refraction work, XBT measurements, a few gravity cores at the study area, continuous 12 kHz and 3.5 kHz echo-sounding, magnetometer measurements along all portions of the track of adequate water depth, and gravity measurements in the first portion of the leg. Single-channel airgun measurements were taken along much of the track, and in selected locations were digitized for later playback. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1979
- Accession Number
- ADA077912
Entities
People
- George G. Shor Jr.
Organizations
- Scripps Institution of Oceanography