Accession Number : AD0762754

Title :   Measurements of Sediment Sound Velocity in Carbonate Sediments from the Whiting Basin, Puerto Rico.

Descriptive Note : Technical rept.,

Corporate Author : NAVAL UNDERWATER SYSTEMS CENTER NEWPORT R I

Personal Author(s) : Morton,Robert W.

Report Date : 19 APR 1973

Pagination or Media Count : 12

Abstract : A series of sediment cores were obtained from the Whiting Basin southeast of Puerto Rico to investigate the factors affecting the velocity of sound in marine carbonate deposits. The cores indicated that the deposits in the Whiting Basin are similar to abyssal plain deposits with lenticular turbidite sequences alternating with pelagic sediments. Normal methods for predicting sound velocity from the physical properties of the deposits were found to be inaccurate for these samples. The established relationships of grain size and porosity to sound velocity were invalid because the sands found in the cores consisted of hollow foram tests, causing high porosity independent of grain size. The rigidity of the deposit was the most significant factor determining sediment sound velocity and was itself controlled by (1) the sediment source, (2) transportation effects, (3) the packing of the deposit, and (4) the presence or absence of intergranular cementation. (Modified author abstract)

Descriptors :   (*OCEAN BOTTOM, ACOUSTIC PROPERTIES), (*CARIBBEAN SEA, OCEAN BOTTOM SAMPLING), PHYSICAL PROPERTIES, POROSITY, PARTICLE SIZE, APPARENT DENSITY, CARBONATE MINERALS, FORAMINIFERA

Subject Categories : Physical and Dynamic Oceanography

Distribution Statement : APPROVED FOR PUBLIC RELEASE