Zachos, James C; Opdyke, Bradley N; Quinn, Terrence Michael; Jones, Charles E; Halliday, Alex N (1999): (Table 1) Strontium isotope ratios of planktonic foraminifera and ostracoda from ODP Hole 120-748B on the Kerguelen Plateau, Indian Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.695370, Supplement to: Zachos, JC et al. (1999): Early cenozoic glaciation, antarctic weathering, and seawater 87Sr/86Sr: is there a link? Chemical Geology, 161(1-3), 165-180, https://doi.org/10.1016/S0009-2541(99)00085-6
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Abstract:
Stable and radiogenic isotopic and sedimentological data from sub-Antarctic deep sea sediment cores reveal a temporal link between changes in seawater 87Sr/86Sr ratios and major episodes of late Eocene-early Oligocene climate change. The 87Sr/86Sr records show two major inflections, one at 38-39 Ma near the middle/late Eocene boundary, followed by another at 33.4 Ma. Similarly, the oxygen isotope, ice-rafted debris, and clay assemblage records indicate two important climatic events: the appearance of alpine glaciers and/or small ice-sheets on Antarctica in the late Eocene at 38-39 Ma, followed by a rapid transition to larger and more permanent temperate ice-sheets in the early Oligocene at 33.4 Ma. Moreover, during the early Oligocene 30-33 Ma. three to four inferred peaks in glacial activity appear to coincide with subtle steps in the 87Sr/86Sr record. The coupled variations in climate and seawater Sr isotope ratios during the Eocene/Oligocene imply a strong causal link between the two. Either changes in climate directly influenced patterns of continental weathering and hence seawater chemistry, and/or a tectonic event e.g., uplift.as reflected in weathering and seawater chemistry triggered relatively abrupt changes in global climate.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: -58.441000 * Longitude: 78.998100
Date/Time Start: 1988-03-14T07:30:00 * Date/Time End: 1988-03-15T11:00:00
Minimum DEPTH, sediment/rock: 67.00 m * Maximum DEPTH, sediment/rock: 179.60 m
Event(s):
120-748B * Latitude: -58.441000 * Longitude: 78.998100 * Date/Time Start: 1988-03-14T07:30:00 * Date/Time End: 1988-03-15T11:00:00 * Elevation: -1301.0 m * Penetration: 225.1 m * Recovery: 190.15 m * Location: South Indian Ridge, South Indian Ocean * Campaign: Leg120 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 225.1 m cored; 0 m drilled; 84.5 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Sample code/label | Sample label | Zachos, James C | DSDP/ODP/IODP sample designation | ||
| 3 | Sample type | Samp type | Zachos, James C | |||
| 4 | Strontium-87/Strontium-86 ratio | 87Sr/86Sr | Zachos, James C | |||
| 5 | Strontium-87/Strontium-86 ratio, error | 87Sr/86Sr e | ± | Zachos, James C | 2 sigma |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
154 data points
Data
| 1 Depth sed [m] | 2 Sample label | 3 Samp type | 4 87Sr/86Sr | 5 87Sr/86Sr e [±] |
|---|---|---|---|---|
| 67.00 | 120-748B-9H-1,40-44 | Plank. Foram. | 0.708190 | 0.000014 |
| 87.50 | 120-748B-11H-2,40-44 | Plank. Foram. | 0.708010 | 0.000014 |
| 99.10 | 120-748B-12H-3,100-102 | Plank. Foram. | 0.707953 | 0.000013 |
| 104.50 | 120-748B-12H-7,40-44 | Plank. Foram. | 0.707950 | 0.000014 |
| 106.28 | 120-748B-13H-2,18-22 | Plank. Foram. | 0.707882 | 0.000013 |
| 106.28 | 120-748B-13H-2,18-22 | Ostracode | 0.707876 | 0.000011 |
| 109.90 | 120-748B-13H-4,80-84 | Plank. Foram. | 0.707890 | 0.000016 |
| 112.28 | 120-748B-13H-6,18-22 | Plank. Foram. | 0.707824 | 0.000017 |
| 114.90 | 120-748B-14H-1,80-84 | Plank. Foram. | 0.707830 | 0.000014 |
| 116.98 | 120-748B-14H-2,138-142 | Plank. Foram. | 0.707796 | 0.000014 |
| 118.48 | 120-748B-14H-3,138-142 | Plank. Foram. | 0.707763 | 0.000014 |
| 119.98 | 120-748B-14H-4,138-142 | Plank. Foram. | 0.707808 | 0.000016 |
| 120.50 | 120-748B-14H-5,40-44 | Plank. Foram. | 0.707757 | 0.000013 |
| 121.11 | 120-748B-14H-5,97-101 | Plank. Foram. | 0.707788 | 0.000011 |
| 121.11 | 120-748B-14H-5,97-101 | Plank. Foram. | 0.707766 | 0.000011 |
| 121.48 | 120-748B-14H-5,138-142 | Plank. Foram. | 0.707771 | 0.000011 |
| 121.48 | 120-748B-14H-5,138-142 | Plank. Foram. | 0.707775 | 0.000013 |
| 121.48 | 120-748B-14H-5,138-142 | Ostracode | 0.707776 | 0.000011 |
| 122.98 | 120-748B-14H-6,138-142 | Plank. Foram. | 0.707774 | 0.000011 |
| 123.80 | 120-748B-15H-1,16-20 | Plank. Foram. | 0.707772 | 0.000011 |
| 125.20 | 120-748B-15H-2,7-11 | Plank. Foram. | 0.707784 | |
| 125.30 | 120-748B-15H-2,16-20 | Plank. Foram. | 0.707779 | 0.000011 |
| 127.00 | 120-748B-15H-3,40-44 | Plank. Foram. | 0.707760 | 0.000014 |
| 129.70 | 120-748B-15H-5,7-11 | Plank. Foram. | 0.707717 | |
| 129.80 | 120-748B-15H-5,16-20 | Plank. Foram. | 0.707766 | 0.000014 |
| 132.80 | 120-748B-15H-7,16-20 | Plank. Foram. | 0.707738 | 0.000025 |
| 134.61 | 120-748B-16H-2,18-22 | Plank. Foram. | 0.707745 | 0.000011 |
| 135.43 | 120-748B-16H-2,100-102 | Plank. Foram. | 0.707750 | 0.000013 |
| 135.43 | 120-748B-16H-2,100-102 | Ostracode | 0.707751 | 0.000013 |
| 139.33 | 120-748B-16H-5,40-44 | Plank. Foram. | 0.707730 | 0.000014 |
| 142.78 | 120-748B-17H-1,18-22 | Plank. Foram. | 0.707722 | 0.000012 |
| 148.78 | 120-748B-17H-5,18-22 | Plank. Foram. | 0.707740 | 0.000011 |
| 154.00 | 120-748B-18H-2,40-44 | Plank. Foram. | 0.707720 | 0.000014 |
| 159.10 | 120-748B-18H-5,100-102 | Plank. Foram. | 0.707727 | 0.000011 |
| 159.10 | 120-748B-18H-5,100-102 | Plank. Foram. | 0.707717 | 0.000011 |
| 167.10 | 120-748B-19H-4,96-100 | Plank. Foram. | 0.707724 | 0.000011 |
| 174.90 | 120-748B-20H-3,80-84 | Plank. Foram. | 0.707770 | 0.000017 |
| 175.10 | 120-748B-20H-3,100-102 | Plank. Foram. | 0.707748 | 0.000013 |
| 179.60 | 120-748B-20H-6,96-100 | Plank. Foram. | 0.707731 | 0.000011 |