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

Robinson, Stuart A; Vance, Derek (2012): Age model and Nd isotope ratios of DSDO Hole 43-386 and ODP Hole 210-1276A [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817120, Supplement to: Robinson, SA; Vance, D (2012): Widespread and synchronous change in deep-ocean circulation in the North and South Atlantic during the Late Cretaceous. Paleoceanography, 27(1), PA1102, https://doi.org/10.1029/2011PA002240

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

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Modern thermohaline circulation plays a role in latitudinal heat transport and in deep-ocean ventilation, yet ocean circulation may have functioned differently during past periods of extreme warmth, such as the Cretaceous. The Late Cretaceous (100-65 Ma) was an important period in the evolution of the North Atlantic Ocean, characterized by opening ocean gateways, long-term climatic cooling and the cessation of intermittent periods of anoxia (oceanic anoxic events, OAEs). However, how these phenomena relate to deep-water circulation is unclear. We use a proxy for deep-water mass composition (neodymium isotopes; e-Nd) to show that, at North Atlantic ODP Site 1276, deep waters shifted in the early Campanian (~78-83 Ma) from e-Nd values of ~-7 to values of ~-9, consistent with a change in the style of deep-ocean circulation but >10 Myr after a change in bottom water oxygenation conditions. A similar, but more poorly dated, trend exists in e-Nd data from DSDP Site 386. The Campanian e-Nd transition observed in the North Atlantic records is also seen in the South Atlantic and proto-Indian Ocean, implying a widespread and synchronous change in deep-ocean circulation. Although a unique explanation does not exist for the change at present, we favor an interpretation that invokes Late Cretaceous climatic cooling as a driver for the formation of Southern Component Water, which flowed northward from the Southern Ocean and into the North Atlantic and proto-Indian Oceans.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 38.296065 * Median Longitude: -54.517415 * South-bound Latitude: 31.186800 * West-bound Longitude: -64.249000 * North-bound Latitude: 45.405330 * East-bound Longitude: -44.785830
Date/Time Start: 1975-07-24T00:00:00 * Date/Time End: 2003-07-16T08:44:00
Event(s):
210-1276A * Latitude: 45.405330 * Longitude: -44.785830 * Date/Time Start: 2003-07-16T08:44:00 * Date/Time End: 2003-02-09T16:20:00 * Elevation: -4549.1 m * Penetration: 1736.9 m * Recovery: 790.35 m * Location: South Atlantic Ocean * Campaign: Leg210 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 103 cores; 936.9 m cored; 753 m drilled; 84.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 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. Robinson, SA; Vance, D (2012): (Table S1) Age model for DSDP Hole 43-386. https://doi.org/10.1594/PANGAEA.817170
  2. Robinson, SA; Vance, D (2012): (Table S3) Nd-isotopic ratios from DSDP Hole 43-386. https://doi.org/10.1594/PANGAEA.817173
  3. Robinson, SA; Vance, D (2012): (Table S2) Age model for ODP Hole 210-1276A. https://doi.org/10.1594/PANGAEA.817100
  4. Robinson, SA; Vance, D (2012): (Table S4) Nd-isotopic ratios from ODP Hole 210-1276A. https://doi.org/10.1594/PANGAEA.817117