Smalley, P Craig; Nordaa, A; Raheim, A (1986): Sr, C and O isotope ratios of Neogene sediments from DSDP Hole 38-341, Voring Plateau [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.714252, Supplement to: Smalley, PC et al. (1986): Geochronology and paleothermometry of Neogene sediments from the Voring Plateau using Sr, C and O isotopes. Earth and Planetary Science Letters, 78(4), 368-378, https://doi.org/10.1016/0012-821X(86)90004-X
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
The Neogene sediments from DSDP site 341 on the Voring Plateau, Norwegian Sea, contain a thin glauconitic pellet-bearing subunit, which separates underlying pelagic clays from overlying glacial-marine sediments. Oxygen isotope measurements of benthic foraminifera show a delta18O shift of + 1 per mil during deposition of this subunit, probably a combined effect of a drop in bottom water temperature and a rise in seawater delta18O. The chronology of this sedimentological and O isotope transition is, however, poorly constrained by fossil evidence.
Rb-Sr dating of glauconitic pellets indicates that the lower part of the glauconitic subunit was deposited 11.6 +/- 0.2 Ma ago. Further geochronological evidence, derived from the Sr and C isotopic compositions of foraminifera compared with known seawater-time variations, indicates that the lower pelagic clays are early to middle Miocene, deposited at a mean rate of ~15 m/Ma. The glauconitic subunit contains part of the middle Miocene and probably all of the late Miocene in a condensed sequence with a very low mean depositional rate (~0.2 m/Ma). The overlying glacial marine sediments are probably Pliocene, with a high mean rate of deposition, ~45 m/Ma.
This is the first application of C, O and Sr isotopic stratigraphy combined with Rb-Sr dating of glauconitic minerals, and it illustrates the applications of this integrated approach in geochronology.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: 67.335000 * Longitude: 6.110700
Date/Time Start: 1974-08-18T00:00:00 * Date/Time End: 1974-08-18T00:00:00
Event(s):
38-341 * Latitude: 67.335000 * Longitude: 6.110700 * Date/Time: 1974-08-18T00:00:00 * Elevation: -1439.0 m * Penetration: 456 m * Recovery: 214.8 m * Location: North Atlantic/Norwegian Sea * Campaign: Leg38 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 313.5 m cored; 0 m drilled; 68.5 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
Download Data
Datasets listed in this publication series
- Smalley, PC; Nordaa, A; Raheim, A (1986): (Table 1) Stable carbon and oxygen isotope ratios of benthic foraminifera from DSDP Hole 38-341. https://doi.org/10.1594/PANGAEA.713949
- Smalley, PC; Nordaa, A; Raheim, A (1986): (Table 2) Rb-Sr isotope composition for glauconitic pellet samples from DSDP Hole 38-341. https://doi.org/10.1594/PANGAEA.713951
- Smalley, PC; Nordaa, A; Raheim, A (1986): (Table 3) Sr isotope composition for foraminifera nd secondary gypsum from DSDP Hole 38-341. https://doi.org/10.1594/PANGAEA.713962