McKenzie, Judith A; Palmer, Sarah C; Mueller, Paul A (1990): Pleistocene-Pliocene strontium-isotope ratios of ODP Site 107-653 (Table 1) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.746043, Supplement to: McKenzie, JA et al. (1990): Strontium isotope stratigraphy of the Pliocene-Pleistocene ''Deep-Sea Type Section'' at ODP Hole 653A. In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 401-404, https://doi.org/10.2973/odp.proc.sr.107.160.1990
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Abstract:
Strontium isotopic determinations were made on samples from the Pliocene-Pleistocene sequence recovered at ODP Hole 653A, the proposed "deep-sea type section" for the Mediterranean region. Biostratigraphic correlations can be combined with the patterns of variations in the 87Sr/86Sr values to delineate the following: (1) the earliest Pliocene (MP11 to basal MP12 zones) is distinguished by fluctuations in the ratio, probably related to the unstable paleoceanographic conditions following the Zanclean flooding and initial in-filling of the Mediterranean after the Messinian desiccation, (2) during most of the Pliocene between approximately 4.5 and 2.4 Ma (MP12 to MP15 zones) the 87Sr/86Sr values remain relatively constant, producing a plateau in the strontium isotope-depth curve for this period, and (3) beginning at approximately 2.4 Ma (across the MP15/MP16 boundary) and continuing into the latest Pleistocene, the 7Sr/86Sr values increase significantly but show fluctuations that have both positive and negative slopes.
The presence of a plateau in the curve generated for the Mediterranean type section duplicates in greater detail the late Neogene results reported by DePaolo (1986, doi:10.1130/0091-7613(1986)14<103:DROTNS>2.0.CO;2). The virtual lack of change in the ratio between 4.5 and 2.4 Ma essentially eliminates strontium isotopes as a high-resolution correlation method for this period. The fluctuations in the ratio beginning at 2.4 Ma may be a reflection of major climatic changes occurring in the latest Pliocene-Pleistocene. The relationship between glacial-interglacial cycles and seawater 87Sr/86Sr values suggested by DePaolo (1986) and Capo and DePaolo (1987) is uncertain but should be tested as significant increases and decreases in 87Sr/86Sr of seawater have apparently occurred since 2.4 Ma.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 40.264300 * Median Longitude: 11.449500 * South-bound Latitude: 40.264300 * West-bound Longitude: 11.449200 * North-bound Latitude: 40.264300 * East-bound Longitude: 11.449800
Date/Time Start: 1986-01-29T01:58:00 * Date/Time End: 1986-02-03T03:55:00
Minimum DEPTH, sediment/rock: 5.93 m * Maximum DEPTH, sediment/rock: 211.30 m
Event(s):
107-653A * Latitude: 40.264300 * Longitude: 11.449800 * Date/Time Start: 1986-01-29T01:58:00 * Date/Time End: 1986-01-31T15:38:00 * Elevation: -2817.0 m * Penetration: 240.7 m * Recovery: 211.29 m * Location: Tirreno Sea * Campaign: Leg107 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 26 cores; 240.7 m cored; 0 m drilled; 87.8 % recovery
107-653B * Latitude: 40.264300 * Longitude: 11.449200 * Date/Time Start: 1986-01-31T15:38:00 * Date/Time End: 1986-02-03T03:55:00 * Elevation: -2817.0 m * Penetration: 264.3 m * Recovery: 219.08 m * Location: Tirreno Sea * Campaign: Leg107 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 264.3 m cored; 0 m drilled; 82.9 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Sample code/label | Sample label | McKenzie, Judith A | DSDP/ODP/IODP sample designation | ||
| 3 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 4 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | McKenzie, Judith A | Mass spectrometer VG Instruments 354 triple collector | ||
| 5 | Strontium-87/Strontium-86 ratio, error | 87Sr/86Sr e | ± | McKenzie, Judith A | Mass spectrometer VG Instruments 354 triple collector |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
90 data points