Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes
High-resolution bio- and chemostratigraphy of an earliest Pliocene section from ODP Site 652 indicates that postflood paleoceanographic conditions in the Tyrrhenian Sea can be sub-divided into two discrete intervals. The first is manifested by an acme of Sphaeroidinellopsis spp., increasing carbonat...
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1990
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.746047 2023-05-15T18:01:11+02:00 Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes McKenzie, Judith A Sprovieri, Rodolfo MEDIAN LATITUDE: 40.435487 * MEDIAN LONGITUDE: 11.283100 * SOUTH-BOUND LATITUDE: 40.264300 * WEST-BOUND LONGITUDE: 10.696700 * NORTH-BOUND LATITUDE: 40.579300 * EAST-BOUND LONGITUDE: 12.143200 * DATE/TIME START: 1986-01-18T08:20:00 * DATE/TIME END: 1986-02-08T15:15:00 1990-10-08 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.746047 https://doi.org/10.1594/PANGAEA.746047 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.746047 https://doi.org/10.1594/PANGAEA.746047 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: McKenzie, Judith A; Sprovieri, Rodolfo (1990): Paleoceanographic conditions following the earliest Pliocene flooding of the Tyrrhenian Sea. In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 405-414, https://doi.org/10.2973/odp.proc.sr.107.162.1990 107-652A 107-653B 107-654A DRILL Drilling/drill rig Joides Resolution Leg107 Ocean Drilling Program ODP Tirreno Sea Dataset 1990 ftpangaea https://doi.org/10.1594/PANGAEA.746047 https://doi.org/10.2973/odp.proc.sr.107.162.1990 2023-01-20T07:31:56Z High-resolution bio- and chemostratigraphy of an earliest Pliocene section from ODP Site 652 indicates that postflood paleoceanographic conditions in the Tyrrhenian Sea can be sub-divided into two discrete intervals. The first is manifested by an acme of Sphaeroidinellopsis spp., increasing carbonate contents, and a progressive decrease upsection in both the d13C and dl8O values of the planktonic foraminifera. The lower part of the acme interval contains unusual surface-to-bottom water isotope gradients suggesting a stratification of two water masses. Normal gradients in the upper part of the acme interval suggest a well-mixed water body. Between the end of the acme interval and the MP11/MP12 boundary, denoted by the first occurrence (F.O.) of Globorotalia margaritae, a migrational first appearance, there was a catastrophic collapse of the gradient marking an onset of the second post-flood interval. The disintegration of habitable conditions is suggested by a sharp decrease in carbonate content and the disappearance of the benthonic assemblage, which is subsequently replaced predominantly by Uvigerinapygmea, indicative of cold, low-oxygenated bottom waters. The introduction of benthonic species denoting well-oxygenated bottom conditions occurs within the lower MP12 zone. Superimposed on these overall trends are shorter term, warm-cold cycles, which are interpreted as orbitally induced, climatic fluctuations. Correlative studies of the less complete earliest Pliocene sections from ODP Holes 653B and 654A confirm these interpretations. A scenario derived from an integration of all the stratigraphic data indicates that normal paleoceanographic conditions were operating in the Tyrrhenian Sea only approximately 250,000 yr after the cessation of Messinian evaporative conditions at the Miocene/Pliocene boundary. The post-flood interval is marked by an initial period of gradual infilling, the Sphaeroidinellopsis spp. acme interval, followed by a disintegration of oceanographic conditions and a second recovery period. A ... Dataset Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(10.696700,12.143200,40.579300,40.264300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
107-652A 107-653B 107-654A DRILL Drilling/drill rig Joides Resolution Leg107 Ocean Drilling Program ODP Tirreno Sea |
spellingShingle |
107-652A 107-653B 107-654A DRILL Drilling/drill rig Joides Resolution Leg107 Ocean Drilling Program ODP Tirreno Sea McKenzie, Judith A Sprovieri, Rodolfo Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes |
topic_facet |
107-652A 107-653B 107-654A DRILL Drilling/drill rig Joides Resolution Leg107 Ocean Drilling Program ODP Tirreno Sea |
description |
High-resolution bio- and chemostratigraphy of an earliest Pliocene section from ODP Site 652 indicates that postflood paleoceanographic conditions in the Tyrrhenian Sea can be sub-divided into two discrete intervals. The first is manifested by an acme of Sphaeroidinellopsis spp., increasing carbonate contents, and a progressive decrease upsection in both the d13C and dl8O values of the planktonic foraminifera. The lower part of the acme interval contains unusual surface-to-bottom water isotope gradients suggesting a stratification of two water masses. Normal gradients in the upper part of the acme interval suggest a well-mixed water body. Between the end of the acme interval and the MP11/MP12 boundary, denoted by the first occurrence (F.O.) of Globorotalia margaritae, a migrational first appearance, there was a catastrophic collapse of the gradient marking an onset of the second post-flood interval. The disintegration of habitable conditions is suggested by a sharp decrease in carbonate content and the disappearance of the benthonic assemblage, which is subsequently replaced predominantly by Uvigerinapygmea, indicative of cold, low-oxygenated bottom waters. The introduction of benthonic species denoting well-oxygenated bottom conditions occurs within the lower MP12 zone. Superimposed on these overall trends are shorter term, warm-cold cycles, which are interpreted as orbitally induced, climatic fluctuations. Correlative studies of the less complete earliest Pliocene sections from ODP Holes 653B and 654A confirm these interpretations. A scenario derived from an integration of all the stratigraphic data indicates that normal paleoceanographic conditions were operating in the Tyrrhenian Sea only approximately 250,000 yr after the cessation of Messinian evaporative conditions at the Miocene/Pliocene boundary. The post-flood interval is marked by an initial period of gradual infilling, the Sphaeroidinellopsis spp. acme interval, followed by a disintegration of oceanographic conditions and a second recovery period. A ... |
format |
Dataset |
author |
McKenzie, Judith A Sprovieri, Rodolfo |
author_facet |
McKenzie, Judith A Sprovieri, Rodolfo |
author_sort |
McKenzie, Judith A |
title |
Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes |
title_short |
Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes |
title_full |
Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes |
title_fullStr |
Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes |
title_full_unstemmed |
Stable carbon and oxygen isotopes of foraminifera fand carbon content of ODP Leg 107 holes |
title_sort |
stable carbon and oxygen isotopes of foraminifera fand carbon content of odp leg 107 holes |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.746047 https://doi.org/10.1594/PANGAEA.746047 |
op_coverage |
MEDIAN LATITUDE: 40.435487 * MEDIAN LONGITUDE: 11.283100 * SOUTH-BOUND LATITUDE: 40.264300 * WEST-BOUND LONGITUDE: 10.696700 * NORTH-BOUND LATITUDE: 40.579300 * EAST-BOUND LONGITUDE: 12.143200 * DATE/TIME START: 1986-01-18T08:20:00 * DATE/TIME END: 1986-02-08T15:15:00 |
long_lat |
ENVELOPE(10.696700,12.143200,40.579300,40.264300) |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Supplement to: McKenzie, Judith A; Sprovieri, Rodolfo (1990): Paleoceanographic conditions following the earliest Pliocene flooding of the Tyrrhenian Sea. In: Kastens, KA; Mascle, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 107, 405-414, https://doi.org/10.2973/odp.proc.sr.107.162.1990 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.746047 https://doi.org/10.1594/PANGAEA.746047 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.746047 https://doi.org/10.2973/odp.proc.sr.107.162.1990 |
_version_ |
1766170541533691904 |