Carbon and oxygen isotope data from Corchia Cave speleothems and oxygen isotope, SST and C37:4 data from IODP sites 339-U1385 and 339-U1387 for the period 970 - 810 ka
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2020
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| author | Bajo, Petra Drysdale, Russell N Woodhead, Jon D Hellstrom, John C Hodell, David A Ferretti, Patrizia Voelker, Antje H L Zanchetta, Giovanni Rodrigues, Teresa Wolff, Eric William Tyler, Jonathan James Frisia, Silvia Spötl, Christoph Fallick, Anthony E |
| author_facet | Bajo, Petra Drysdale, Russell N Woodhead, Jon D Hellstrom, John C Hodell, David A Ferretti, Patrizia Voelker, Antje H L Zanchetta, Giovanni Rodrigues, Teresa Wolff, Eric William Tyler, Jonathan James Frisia, Silvia Spötl, Christoph Fallick, Anthony E |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The archived data presented here are derived from analytical measurements performed on ocean sediments from cores drilled off the Iberian Margin and speleothems collected from Corchia Cave (Italy). The time span is 970 to 810 ka. A full description of the sample preparation procedures and analytical methods is contained in the Supplementary Material of the article. The ocean coring sites are IODP Site U1385 and Site U1387. From Site U1385 for this study, we measured: the oxygen isotope ratios on planktic (Globigerina bulloides) and benthic (Cibicidoides weullerstorfi) foraminfera at 2 cm resolution. The alkenone C37:4 biomarker data from the same site were taken from Rodrigues et al. (2017). From Site U1387 for this study, we measured: the oxygen isotope ratios on planktic foraminifera (Globigerina bulloides) and alkenone biomarkers for calculating the index Uk'37 , a proxy for sea-surface temperatures. Data from U1387 were placed onto the U1385 depth scale by synchronising the planktic oxygen isotope series. All measurements were made using standard analytical methods following the preparation procedures outlined in the Supplementary Materials of Bajo et al. (2020). The data for Corchia Cave were from four stalagmites and one subaqueous speleothem. Stable oxygen and carbon isotopes were measured on all speleothems. For the four stalagmites, sampling was conducted at 1 mm resolution. For stalagmite CC8, which covers the longest time interval, the sampling resolution was increased to 250 μm through termination X and XII. For the subaqueous speleothem (CD3), oxygen and carbon isotopes were measured on samples milled at 200 μm increments. The speleothem chronology was based on U-Pb radiometric ages from the four stalagmites. The individual time series were stacked into a single time series utilising all of the U-Pb ages. Analytical methods are described in detail in the Supplementary Materials of Bajo et al. (2020). The ocean and speleothem data were combined in order to place the ocean proxy series onto a radiometric time scale. This was achieved by synchronising the planktic G. bulloides oxygen isotope series to the speleothem oxygen isotope series. The principal purpose was to determine the timing of terminations X and XII and compare these ages with the astronomical template. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_914414 |
| institution | PANGAEA |
| language | en |
| publishDate | 2020 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Carbon and oxygen isotope data from Corchia Cave speleothems and oxygen isotope, SST and C37:4 data from IODP sites 339-U1385 and 339-U1387 for the period 970 - 810 ka Bajo, Petra Drysdale, Russell N Woodhead, Jon D Hellstrom, John C Hodell, David A Ferretti, Patrizia Voelker, Antje H L Zanchetta, Giovanni Rodrigues, Teresa Wolff, Eric William Tyler, Jonathan James Frisia, Silvia Spötl, Christoph Fallick, Anthony E Geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Stable isotopes The archived data presented here are derived from analytical measurements performed on ocean sediments from cores drilled off the Iberian Margin and speleothems collected from Corchia Cave (Italy). The time span is 970 to 810 ka. A full description of the sample preparation procedures and analytical methods is contained in the Supplementary Material of the article. The ocean coring sites are IODP Site U1385 and Site U1387. From Site U1385 for this study, we measured: the oxygen isotope ratios on planktic (Globigerina bulloides) and benthic (Cibicidoides weullerstorfi) foraminfera at 2 cm resolution. The alkenone C37:4 biomarker data from the same site were taken from Rodrigues et al. (2017). From Site U1387 for this study, we measured: the oxygen isotope ratios on planktic foraminifera (Globigerina bulloides) and alkenone biomarkers for calculating the index Uk'37 , a proxy for sea-surface temperatures. Data from U1387 were placed onto the U1385 depth scale by synchronising the planktic oxygen isotope series. All measurements were made using standard analytical methods following the preparation procedures outlined in the Supplementary Materials of Bajo et al. (2020). The data for Corchia Cave were from four stalagmites and one subaqueous speleothem. Stable oxygen and carbon isotopes were measured on all speleothems. For the four stalagmites, sampling was conducted at 1 mm resolution. For stalagmite CC8, which covers the longest time interval, the sampling resolution was increased to 250 μm through termination X and XII. For the subaqueous speleothem (CD3), oxygen and carbon isotopes were measured on samples milled at 200 μm increments. The speleothem chronology was based on U-Pb radiometric ages from the four stalagmites. The individual time series were stacked into a single time series utilising all of the U-Pb ages. Analytical methods are described in detail in the Supplementary Materials of Bajo et al. (2020). The ocean and speleothem data were combined in order to place the ocean proxy series onto a radiometric time scale. This was achieved by synchronising the planktic G. bulloides oxygen isotope series to the speleothem oxygen isotope series. The principal purpose was to determine the timing of terminations X and XII and compare these ages with the astronomical template. |
| title | Carbon and oxygen isotope data from Corchia Cave speleothems and oxygen isotope, SST and C37:4 data from IODP sites 339-U1385 and 339-U1387 for the period 970 - 810 ka |
| topic | Geochronology; glacial terminations; Palaeoceanography; palaeoclimatology; Speleothems; Stable isotopes |
| url | https://doi.org/10.1594/PANGAEA.914414 |