Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Andrews, Daniel; Hargrave, B T (1984): Silicate in marine sediments from the Emerland Basin, North Atlantic. PANGAEA, https://doi.org/10.1594/PANGAEA.735060, Supplement to: Andrews, D; Hargrave, BT (1984): Close interval sampling of interstitial silicate and porosity in marine sediments. Geochimica et Cosmochimica Acta, 48(4), 711-722, https://doi.org/10.1016/0016-7037(84)90097-8

Always quote above citation when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
A method was developed to measure porosity and dissolved interstitial silicate at millimeter intervals or less in a sediment core. In cores from Emerald Basin (Scotian Shelf), interstitial concentrations near the sediment surface did not drop rapidly to bottom-water concentrations as measured in bottle casts (28 µM) but remained as high as 166 µM in the upper 0.5 mm of sediment High rates of benthic silicate release were measured which could not be accounted for by interstitial concentration gradients or by ventilation of macro-invertebrate burrows. The silicate discontinuity observed between the sediments and water column suggests that a diffusive sublayer exists in a zone of viscous flow above the sediment surface. This is possible only if a surface reaction is primarily responsible for silicate release. By assuming a linear concentration gradient across this diffusive sublayer, the silicate release rates were used to estimate the thickness of the sublayer to be about 2 mm.
Project(s):
Silicon Cycling in the World Ocean (SINOPS)
Coverage:
Median Latitude: 44.200000 * Median Longitude: -63.500000 * South-bound Latitude: 44.170000 * West-bound Longitude: -63.525000 * North-bound Latitude: 44.230000 * East-bound Longitude: -63.475000
Date/Time Start: 1983-03-20T00:00:00 * Date/Time End: 1985-06-27T00:00:00
Event(s):
EmeraldBasin2-11 * Latitude: 44.170000 * Longitude: -63.475000 * Date/Time Start: 1983-03-20T00:00:00 * Date/Time End: 1983-03-24T00:00:00 * Elevation: 236.0 m * Device: Core (CORE)
EmeraldBasin2-3 * Latitude: 44.170000 * Longitude: -63.475000 * Date/Time Start: 1983-03-20T00:00:00 * Date/Time End: 1983-03-24T00:00:00 * Elevation: 236.0 m * Device: Core (CORE)
EmeraldBasin4-1 * Latitude: 44.230000 * Longitude: -63.525000 * Date/Time Start: 1985-06-26T00:00:00 * Date/Time End: 1985-06-27T00:00:00 * Elevation: 265.0 m * Device: Core (CORE)
Size:
4 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text (use the following character encoding: )