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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2011
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| Online Access: | https://doi.org/10.1594/PANGAEA.763934 |
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| _version_ | 1867168099939123200 |
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| author | Ando, Atsushi Khim, Boo-Keun Nakano, Takanori Takata, Hiroyuki |
| author_facet | Ando, Atsushi Khim, Boo-Keun Nakano, Takanori Takata, Hiroyuki |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | An integrated chemostratigraphic (87Sr/86Sr, d13C and 18O) study of benthic foraminifera is presented for a 210 m-thick, intermediate depth (upper/middle bathyal transition), Miocene nannofossil ooze section of Ocean Drilling Program Site 1120, Campbell Plateau off New Zealand. Our results indicate that new 87Sr/86Sr, d13C and d18O profiles are wholly consistent with their respective Miocene reference curves. These observations facilitate identification of a total of five reliable chemostratigraphic datums, which are based on the fundamental structural changes in the 87Sr/86Sr curve and paired simultaneous d13C and d18O events. The resultant age-depth relationship clearly shows that the Miocene (20-5 Ma) biopelagic sedimentation on the Campbell Plateau was essentially continuous at a moderate to high, linear sedimentation rate (17.5 m/m.y. with an exception of the uppermost 13 m). Our findings do not support the shipboard biostratigraphic age model, which assumes that the critical early-middle Miocene transition was interrupted by a major hiatus (<~3 m.y.). Because of its unique bathymetric setting at a paleowater-depth of ~ 600 m, which is among the shallowest of the coeval isotopically studied deep-sea sections in the South Pacific/Southern Ocean, Site 1120 will serve as a reference section for surveying the evolution of intermediate-water paleoceanography in the Southern Hemisphere across the middle Miocene climatic transition. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_763934 |
| institution | PANGAEA |
| language | en |
| publishDate | 2011 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Appendix A Table SD1. CaCO3, δ¹⁸O, δ¹³C and Sr isotopes from ODP Site 181-1120 Ando, Atsushi Khim, Boo-Keun Nakano, Takanori Takata, Hiroyuki 181-1120B; 181-1120D; Calcium carbonate; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Finnigan TRITON thermal ionization mass spectrometer (TIMS); Joides Resolution; Leg181; Mass spectrometer Finnigan MAT 251; Ocean Drilling Program; ODP; Period; Sample code/label; South Pacific Ocean; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error An integrated chemostratigraphic (87Sr/86Sr, d13C and 18O) study of benthic foraminifera is presented for a 210 m-thick, intermediate depth (upper/middle bathyal transition), Miocene nannofossil ooze section of Ocean Drilling Program Site 1120, Campbell Plateau off New Zealand. Our results indicate that new 87Sr/86Sr, d13C and d18O profiles are wholly consistent with their respective Miocene reference curves. These observations facilitate identification of a total of five reliable chemostratigraphic datums, which are based on the fundamental structural changes in the 87Sr/86Sr curve and paired simultaneous d13C and d18O events. The resultant age-depth relationship clearly shows that the Miocene (20-5 Ma) biopelagic sedimentation on the Campbell Plateau was essentially continuous at a moderate to high, linear sedimentation rate (17.5 m/m.y. with an exception of the uppermost 13 m). Our findings do not support the shipboard biostratigraphic age model, which assumes that the critical early-middle Miocene transition was interrupted by a major hiatus (<~3 m.y.). Because of its unique bathymetric setting at a paleowater-depth of ~ 600 m, which is among the shallowest of the coeval isotopically studied deep-sea sections in the South Pacific/Southern Ocean, Site 1120 will serve as a reference section for surveying the evolution of intermediate-water paleoceanography in the Southern Hemisphere across the middle Miocene climatic transition. |
| title | Appendix A Table SD1. CaCO3, δ¹⁸O, δ¹³C and Sr isotopes from ODP Site 181-1120 |
| topic | 181-1120B; 181-1120D; Calcium carbonate; Cibicidoides spp., δ13C; Cibicidoides spp., δ18O; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event label; Finnigan TRITON thermal ionization mass spectrometer (TIMS); Joides Resolution; Leg181; Mass spectrometer Finnigan MAT 251; Ocean Drilling Program; ODP; Period; Sample code/label; South Pacific Ocean; Strontium-87/Strontium-86 ratio; Strontium-87/Strontium-86 ratio, error |
| url | https://doi.org/10.1594/PANGAEA.763934 |