Assessment of Density Variations of Marine Sediments with Ocean and Sediment DepthsReport as inadecuate




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The Scientific World Journal - Volume 2014 2014, Article ID 823296, 9 pages -

Research Article

Institute of Geodesy and Geophysics, School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079, China

International IT University, 34A-8A Manas-Zhandosov Street Intersection, Almaty 050040, Kazakhstan

Received 31 December 2013; Accepted 5 February 2014; Published 6 March 2014

Academic Editors: J. Lei and E. Tondi

Copyright © 2014 R. Tenzer and V. Gladkikh. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We analyze the density distribution of marine sediments using density samples taken from 716 drill sites of the Deep Sea Drilling Project DSDP. The samples taken within the upper stratigraphic layer exhibit a prevailing trend of the decreasing density with the increasing ocean depth at a rate of −0.05 g-cm

per 1 km. Our results confirm findings of published studies that the density nonlinearly increases with the increasing sediment depth due to compaction. We further establish a 3D density model of marine sediments and propose theoretical models of the ocean-sediment and sediment-bedrock density contrasts. The sediment density-depth equation approximates density samples with an average uncertainty of about 10% and better represents the density distribution especially at deeper sections of basin sediments than a uniform density model. The analysis of DSDP density data also reveals that the average density of marine sediments is 1.70 g-cm

and the average density of the ocean bedrock is 2.9 g-cm

.





Author: R. Tenzer and V. Gladkikh

Source: https://www.hindawi.com/



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