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Abstract

We present GlobSed, a new global 5‐arc‐minute total sediment thickness grid for the world's oceans and marginal seas. GlobSed covers a larger area than previously published global grids and incorporates updates for the NE Atlantic, Arctic, Southern Ocean, and Mediterranean regions, which results in a 29.7% increase in estimated total oceanic sediment volume. We use this new global grid and a revised global oceanic lithospheric age grid to assess the relationship between the total sediment thickness and age of the underlying oceanic lithosphere and its latitude. An analytical approximation model is used to mathematically describe sedimentation trends in major oceanic basins and to allow paleobathymetric reconstructions at any given geological time. This study provides a much‐needed update of the sediment thickness distribution of the world oceans and delivers a model for sedimentation rates on oceanic crust through time that agrees well with selected drill data used for comparison.

Item Type:	Article
Authors/Creators:	Straume, EO and Gaina, C and Medvedev, S and Hochmuth, K and Gohl, K and Whittaker, JM and Abdul Fattah, R and Doornenbal, JC and Hopper, JR
Keywords:	sediment thickness, marine geophysics, lithospheric age
Journal or Publication Title:	Geochemistry Geophysics Geosystems
Publisher:	Amer Geophysical Union
ISSN:	1525-2027
DOI / ID Number:	https://doi.org/10.1029/2018GC008115
Copyright Information:	Copyright 2019 American Geophysical Union
Related URLs:	Google Scholar: Whittaker, JM UTAS Profile: Whittaker, JM
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