(Appendix A) Age model of ODP Hole 120-747A
Middle Miocene (14.8–11.9 Ma) deep-sea sediments from ODP Hole 747A (Kerguelen Plateau, southern Indian Ocean) contain abundant, well-preserved and diverse planktonic foraminiferal assemblages. A detailed study of the climatic and hydrographic changes that occurred in this region during the Middle M...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.775985 2024-09-15T18:37:25+00:00 (Appendix A) Age model of ODP Hole 120-747A Verducci, Marina Foresi, L M Scott, George H Sprovieri, Mario Lirer, Fabrizio Pelosi, Nicola LATITUDE: -54.811000 * LONGITUDE: 76.794000 * DATE/TIME START: 1988-03-06T22:30:00 * DATE/TIME END: 1988-03-08T17:15:00 * MINIMUM DEPTH, sediment/rock: 61.02 m * MAXIMUM DEPTH, sediment/rock: 79.15 m 2009 text/tab-separated-values, 410 data points https://doi.pangaea.de/10.1594/PANGAEA.775985 https://doi.org/10.1594/PANGAEA.775985 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.775985 https://doi.org/10.1594/PANGAEA.775985 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Verducci, Marina; Foresi, L M; Scott, George H; Sprovieri, Mario; Lirer, Fabrizio; Pelosi, Nicola (2009): The Middle Miocene climatic transition in the Southern Ocean: Evidence of paleoclimatic and hydrographic changes at Kerguelen plateau from planktonic foraminifers and stable isotopes. Palaeogeography, Palaeoclimatology, Palaeoecology, 280(3-4), 371-386, https://doi.org/10.1016/j.palaeo.2009.06.024 120-747A Age model DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg120 Ocean Drilling Program ODP Sample code/label South Indian Ridge South Indian Ocean dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.77598510.1016/j.palaeo.2009.06.024 2024-07-24T02:31:31Z Middle Miocene (14.8–11.9 Ma) deep-sea sediments from ODP Hole 747A (Kerguelen Plateau, southern Indian Ocean) contain abundant, well-preserved and diverse planktonic foraminiferal assemblages. A detailed study of the climatic and hydrographic changes that occurred in this region during the Middle Miocene Climatic Transition led to the identification of an intense cooling phase (the Middle Miocene Shift). Abundance fluctuations of planktonic foraminiferal species with different paleoclimatic affinities, and oxygen and carbon stable isotopes have been integrated in a multi-proxy approach. Reconstruction of changes in foraminiferal faunal composition and diversity through time were the basis for identification of three foraminiferal biofacies. The most prominent faunal change took place at 13.8 Ma, when a fauna with warm-water affinity (marked by high abundance of Globorotalia miozea group and Globoturborotalita woodi plexus) was replaced by an oligotypic, opportunistic fauna with typical polar characters and dominated by neogloboquadrinids. This faunal change is interpreted as the result of foraminiferal migration from adjacent bioprovinces, caused by modifications in climate and hydrography. A positive 2.0 per mil shift in d18O (interpreted as the Mi3 event) and a related positive 1.0 per mil shift in d13C (corresponding to the CM6 event) accompanied this faunal turnover. These are interpreted to reflect substantial reorganization of Southern Ocean waters, the northward migration of the Polar Front and a strong increase in primary productivity. The second faunal change took place at 12.9 Ma and was characterized by the gradual decrease in abundance of the neogloboquadrinids and the recovery of Globorotalia praescitula/scitula group and Globigerinita glutinata. A positive 1.5 per mil shift in d18O (interpreted as the Mi4 event) and a concurrent gradual negative shift in d13C accompanied this faunal change, witnessing further modifications of the climate/ocean system. Variations in sea surface temperature, ... Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(76.794000,76.794000,-54.811000,-54.811000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
120-747A Age model DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg120 Ocean Drilling Program ODP Sample code/label South Indian Ridge South Indian Ocean |
spellingShingle |
120-747A Age model DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg120 Ocean Drilling Program ODP Sample code/label South Indian Ridge South Indian Ocean Verducci, Marina Foresi, L M Scott, George H Sprovieri, Mario Lirer, Fabrizio Pelosi, Nicola (Appendix A) Age model of ODP Hole 120-747A |
topic_facet |
120-747A Age model DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg120 Ocean Drilling Program ODP Sample code/label South Indian Ridge South Indian Ocean |
description |
Middle Miocene (14.8–11.9 Ma) deep-sea sediments from ODP Hole 747A (Kerguelen Plateau, southern Indian Ocean) contain abundant, well-preserved and diverse planktonic foraminiferal assemblages. A detailed study of the climatic and hydrographic changes that occurred in this region during the Middle Miocene Climatic Transition led to the identification of an intense cooling phase (the Middle Miocene Shift). Abundance fluctuations of planktonic foraminiferal species with different paleoclimatic affinities, and oxygen and carbon stable isotopes have been integrated in a multi-proxy approach. Reconstruction of changes in foraminiferal faunal composition and diversity through time were the basis for identification of three foraminiferal biofacies. The most prominent faunal change took place at 13.8 Ma, when a fauna with warm-water affinity (marked by high abundance of Globorotalia miozea group and Globoturborotalita woodi plexus) was replaced by an oligotypic, opportunistic fauna with typical polar characters and dominated by neogloboquadrinids. This faunal change is interpreted as the result of foraminiferal migration from adjacent bioprovinces, caused by modifications in climate and hydrography. A positive 2.0 per mil shift in d18O (interpreted as the Mi3 event) and a related positive 1.0 per mil shift in d13C (corresponding to the CM6 event) accompanied this faunal turnover. These are interpreted to reflect substantial reorganization of Southern Ocean waters, the northward migration of the Polar Front and a strong increase in primary productivity. The second faunal change took place at 12.9 Ma and was characterized by the gradual decrease in abundance of the neogloboquadrinids and the recovery of Globorotalia praescitula/scitula group and Globigerinita glutinata. A positive 1.5 per mil shift in d18O (interpreted as the Mi4 event) and a concurrent gradual negative shift in d13C accompanied this faunal change, witnessing further modifications of the climate/ocean system. Variations in sea surface temperature, ... |
format |
Dataset |
author |
Verducci, Marina Foresi, L M Scott, George H Sprovieri, Mario Lirer, Fabrizio Pelosi, Nicola |
author_facet |
Verducci, Marina Foresi, L M Scott, George H Sprovieri, Mario Lirer, Fabrizio Pelosi, Nicola |
author_sort |
Verducci, Marina |
title |
(Appendix A) Age model of ODP Hole 120-747A |
title_short |
(Appendix A) Age model of ODP Hole 120-747A |
title_full |
(Appendix A) Age model of ODP Hole 120-747A |
title_fullStr |
(Appendix A) Age model of ODP Hole 120-747A |
title_full_unstemmed |
(Appendix A) Age model of ODP Hole 120-747A |
title_sort |
(appendix a) age model of odp hole 120-747a |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.775985 https://doi.org/10.1594/PANGAEA.775985 |
op_coverage |
LATITUDE: -54.811000 * LONGITUDE: 76.794000 * DATE/TIME START: 1988-03-06T22:30:00 * DATE/TIME END: 1988-03-08T17:15:00 * MINIMUM DEPTH, sediment/rock: 61.02 m * MAXIMUM DEPTH, sediment/rock: 79.15 m |
long_lat |
ENVELOPE(76.794000,76.794000,-54.811000,-54.811000) |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Verducci, Marina; Foresi, L M; Scott, George H; Sprovieri, Mario; Lirer, Fabrizio; Pelosi, Nicola (2009): The Middle Miocene climatic transition in the Southern Ocean: Evidence of paleoclimatic and hydrographic changes at Kerguelen plateau from planktonic foraminifers and stable isotopes. Palaeogeography, Palaeoclimatology, Palaeoecology, 280(3-4), 371-386, https://doi.org/10.1016/j.palaeo.2009.06.024 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.775985 https://doi.org/10.1594/PANGAEA.775985 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.77598510.1016/j.palaeo.2009.06.024 |
_version_ |
1810481781725462528 |