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

Gruetzner, Jens; Higgins, Sean M (2010): Depth tie points and ages of IODP Site 306-U1314 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.830906, Supplement to: Gruetzner, J; Higgins, SM (2010): Threshold behavior of millennial scale variability in deep water hydrography inferred from a 1.1 Ma long record of sediment provenance at the southern Gardar Drift. Paleoceanography, 25(4), PA4204, https://doi.org/10.1029/2009PA001873

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

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Integrated Ocean Drilling Program (IODP) Site U1314 of the North Atlantic is a critical sedimentary archive record of subpolar deep water from the southern Gardar Drift for which we derived an age model of orbital resolution for the last 1.8 Ma. This chronology combined with high-resolution (cm scale) X-ray fluorescence core scanning measurements of major elements allows tracking changes in terrigenous provenance during the last 1.1 Ma. Low Potassium to Titanium (K/Ti) ratios reflect enhanced transport of basalt-derived titanomagnetites during warm climate intervals, while high K/Ti ratios indicate a dominance of acidic sediment sources typical for glacial and stadial events. Changes in K/Ti and magnetic concentration at Site 1314 are coeval with fluctuations in smectite content and grain size data from nearby piston cores, suggesting that the provenance changes are mainly controlled by variable flow of the Iceland-Scotland Overflow Water, an important branch of North Atlantic Deep Water. Furthermore, K/Ti variations on orbital time scales show a striking similarity to the deep sea d13C record from ODP Site 607. Pervasive features of the K/Ti time series during and after the Mid-Pleistocene Transition are suborbital changes similar to Dansgaard/Oeschger and Bond oscillations that appear to be strongly amplified during ice growth phases when global benthic d18O was within the range of ~4.1-4.6 per mil. The strong increase in variability of sediment provenance and subsequently deep hydrography at benthic d18O values below ~4.1 suggests that the extent of glaciations and, therefore, sea level corresponding to this value constitutes an important physical threshold that was persistent at least for the last 1.1 Ma.
Project(s):
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 57.710500 * Median Longitude: -26.472222 * South-bound Latitude: 56.364000 * West-bound Longitude: -27.888000 * North-bound Latitude: 60.403500 * East-bound Longitude: -23.640667
Date/Time Start: 1995-07-21T00:00:00 * Date/Time End: 2005-04-10T00:00:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

Download Data

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

Datasets listed in this publication series

  1. Gruetzner, J; Higgins, SM (2010): (Table 1) Initial depth tie points between ODP Site 162-983 and IODP Site 306-U1314. https://doi.org/10.1594/PANGAEA.830903
  2. Gruetzner, J; Higgins, SM (2010): (Table 1) Final age model of IODP Site 306-U1314. https://doi.org/10.1594/PANGAEA.830904
  3. Gruetzner, J; Higgins, SM (2010): (Table 2) Astronomical age constraints for magnetic polarity reversals of IODP Site 306-U1314. https://doi.org/10.1594/PANGAEA.830905