(Table 2) Age determination from different sediment cores of the Juan de Fuca Ridge

DOI

Sedimentation near mid-ocean ridges may differ from pelagic sedimentation due to the influence of the ridges' rough topography on sediment deposition and transport. This study explores whether the near-ridge environment responds to glacial-interglacial changes in climate and oceanography. New benthic d18O, radiocarbon, multi-sensor track, and physical property (sedimentation rates, density, magnetic susceptibility) data for seven cores on the Juan de Fuca Ridge provide multiple records covering the past 700,000 years of oceanographic history of the Northeast Pacific Ocean. Systematic variations in sediment density and coarse fraction correspond to glacial-interglacial cycles identified in benthic d18O, and these observations may provide a framework for mapping the d18O chronostratigraphy via sediment density to other locations on the Juan de Fuca Ridge and beyond. Sedimentation rates generally range from 0.5 to 3 cm/kyr, with background pelagic sedimentation rates close to 1 cm/kyr. Variability in sedimentation rates close to the ridge likely reflects remobilization of sediment caused by the high relief of the ridge bathymetry. Sedimentation patterns primarily reflect divergence of sedimentation rates with distance from the ridge axis and glacial-interglacial variation in sedimentation that may reflect carbonate preservation cycles as well as preferential remobilization of fine material.

Radiocarbon ages were calibrated to calendar years using Calib 7.0 Marine13 (Reimer et al., (2013; doi:10.2458/azu_js_rc.55.16947) & Stuiver and Reimer, (1993; doi:10.1017/S0033822200013904) with a total reservoir correction of 800 years (Delta R = 400).

Supplement to: Costa, K M; McManus, Jerry F; Boulahanis, B; Carbotte, S M; Winckler, Gisela; Huybers, Peter; Langmuir, Charles H (2016): Sedimentation, stratigraphy and physical properties of sediment on the Juan de Fuca Ridge. Marine Geology, 380, 163-173

Identifier
DOI https://doi.org/10.1594/PANGAEA.871940
Related Identifier https://doi.org/10.1016/j.margeo.2016.08.003
Related Identifier https://store.pangaea.de/Publications/Costa-etal_2016/Age%20model%20generation.pdf
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.871940
Provenance
Creator Costa, K M; McManus, Jerry F ORCID logo; Boulahanis, B; Carbotte, S M; Winckler, Gisela; Huybers, Peter ORCID logo; Langmuir, Charles H
Publisher PANGAEA
Publication Year 2017
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Resource Type Supplementary Dataset; Dataset
Format text/tab-separated-values
Size 24 data points
Discipline Earth System Research
Spatial Coverage (-130.879W, 44.887S, -130.504E, 44.973N); Juan de Fuca Ridge, North Pacific Ocean