Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments
A major change in Cenozoic deep-sea benthic foraminifera occurred in the Atlantic, Indian, and Pacific oceans near the Paleocene/Eocene boundary. Benthic foraminiferal abundance changes began at about 61.5 Ma at Pacific Deep Sea Drilling Project (DSDP) Site 577. A major extinction event followed at...
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1987
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.726768 2023-05-15T13:42:09+02:00 Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments Miller, Kenneth G Janecek, Thomas R Katz, Miriam E Keil, David J MEDIAN LATITUDE: 26.080300 * MEDIAN LONGITUDE: 27.328167 * SOUTH-BOUND LATITUDE: -29.484200 * WEST-BOUND LONGITUDE: -51.663300 * NORTH-BOUND LATITUDE: 40.360800 * EAST-BOUND LONGITUDE: 157.723300 * DATE/TIME START: 1975-07-12T00:00:00 * DATE/TIME END: 1982-05-23T00:00:00 1987-08-25 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.726768 https://doi.org/10.1594/PANGAEA.726768 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.726768 https://doi.org/10.1594/PANGAEA.726768 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Miller, Kenneth G; Janecek, Thomas R; Katz, Miriam E; Keil, David J (1987): Abyssal circulation and benthic foraminiferal changes near the Paleocene/Eocene boundary. Paleoceanography, 2(6), 741-761, https://doi.org/10.1029/PA002i006p00741 43-384 73-524 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg43 Leg73 Leg86 North Atlantic/RIDGE North Pacific South Atlantic/CANYON Dataset 1987 ftpangaea https://doi.org/10.1594/PANGAEA.726768 https://doi.org/10.1029/PA002i006p00741 2023-01-20T07:31:29Z A major change in Cenozoic deep-sea benthic foraminifera occurred in the Atlantic, Indian, and Pacific oceans near the Paleocene/Eocene boundary. Benthic foraminiferal abundance changes began at about 61.5 Ma at Pacific Deep Sea Drilling Project (DSDP) Site 577. A major extinction event followed at 58-57 Ma (between Zones P6a and P6b), and a series of first appearances continued until circa 55.5 Ma (Zone P6c). These faunal changes occurred during a 6°C warming of Pacific bottom water and may indicate that the primary cause was changing temperature. Other potential causes of the faunal turnover include global changes in surface ocean productivity and changing bottom water source regions. Comparison of benthic and planktonic delta13C records requires no change in the ratio of oceanic phosphorous to carbon during the late Paleocene to early Eocene, which weakens the case for (but does not disprove) a change in surface ocean productivity at this time. Interbasinal comparisons of benthic foraminiferal delta13C records document that water with high delta13C values filled the Cape Basin during the late Paleocene and possibly the early Eocene (circa 61-57 Ma), but apparently did not extend into the western basins of the Atlantic. This pattern suggests a supply of Antarctic source water for the Cape Basin and possible tectonic isolation of the western Atlantic basins during at least part of the late Paleocene. Carbon isotope comparisons show that bottom water supply to the Cape Basin was reduced in the early Eocene. Eolian grain size data suggest that a decrease in zonal wind intensity occurred at the end of the Paleocene. These late Paleocene climatic changes (bottom water warming and decreased wind intensity) correspond with evidence for an important global tectonic reorganization and extensive subaerial volcanism, which may have contributed to climatic warming through increased supply of CO2. Dataset Antarc* Antarctic North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Indian Pacific ENVELOPE(-51.663300,157.723300,40.360800,-29.484200) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
43-384 73-524 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg43 Leg73 Leg86 North Atlantic/RIDGE North Pacific South Atlantic/CANYON |
spellingShingle |
43-384 73-524 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg43 Leg73 Leg86 North Atlantic/RIDGE North Pacific South Atlantic/CANYON Miller, Kenneth G Janecek, Thomas R Katz, Miriam E Keil, David J Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments |
topic_facet |
43-384 73-524 86-577 Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg43 Leg73 Leg86 North Atlantic/RIDGE North Pacific South Atlantic/CANYON |
description |
A major change in Cenozoic deep-sea benthic foraminifera occurred in the Atlantic, Indian, and Pacific oceans near the Paleocene/Eocene boundary. Benthic foraminiferal abundance changes began at about 61.5 Ma at Pacific Deep Sea Drilling Project (DSDP) Site 577. A major extinction event followed at 58-57 Ma (between Zones P6a and P6b), and a series of first appearances continued until circa 55.5 Ma (Zone P6c). These faunal changes occurred during a 6°C warming of Pacific bottom water and may indicate that the primary cause was changing temperature. Other potential causes of the faunal turnover include global changes in surface ocean productivity and changing bottom water source regions. Comparison of benthic and planktonic delta13C records requires no change in the ratio of oceanic phosphorous to carbon during the late Paleocene to early Eocene, which weakens the case for (but does not disprove) a change in surface ocean productivity at this time. Interbasinal comparisons of benthic foraminiferal delta13C records document that water with high delta13C values filled the Cape Basin during the late Paleocene and possibly the early Eocene (circa 61-57 Ma), but apparently did not extend into the western basins of the Atlantic. This pattern suggests a supply of Antarctic source water for the Cape Basin and possible tectonic isolation of the western Atlantic basins during at least part of the late Paleocene. Carbon isotope comparisons show that bottom water supply to the Cape Basin was reduced in the early Eocene. Eolian grain size data suggest that a decrease in zonal wind intensity occurred at the end of the Paleocene. These late Paleocene climatic changes (bottom water warming and decreased wind intensity) correspond with evidence for an important global tectonic reorganization and extensive subaerial volcanism, which may have contributed to climatic warming through increased supply of CO2. |
format |
Dataset |
author |
Miller, Kenneth G Janecek, Thomas R Katz, Miriam E Keil, David J |
author_facet |
Miller, Kenneth G Janecek, Thomas R Katz, Miriam E Keil, David J |
author_sort |
Miller, Kenneth G |
title |
Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments |
title_short |
Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments |
title_full |
Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments |
title_fullStr |
Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments |
title_full_unstemmed |
Stable carbon and oxygen isotope record of benthic foraminifera from Paleocene-Eocene sediments |
title_sort |
stable carbon and oxygen isotope record of benthic foraminifera from paleocene-eocene sediments |
publisher |
PANGAEA |
publishDate |
1987 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.726768 https://doi.org/10.1594/PANGAEA.726768 |
op_coverage |
MEDIAN LATITUDE: 26.080300 * MEDIAN LONGITUDE: 27.328167 * SOUTH-BOUND LATITUDE: -29.484200 * WEST-BOUND LONGITUDE: -51.663300 * NORTH-BOUND LATITUDE: 40.360800 * EAST-BOUND LONGITUDE: 157.723300 * DATE/TIME START: 1975-07-12T00:00:00 * DATE/TIME END: 1982-05-23T00:00:00 |
long_lat |
ENVELOPE(-51.663300,157.723300,40.360800,-29.484200) |
geographic |
Antarctic Indian Pacific |
geographic_facet |
Antarctic Indian Pacific |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
Supplement to: Miller, Kenneth G; Janecek, Thomas R; Katz, Miriam E; Keil, David J (1987): Abyssal circulation and benthic foraminiferal changes near the Paleocene/Eocene boundary. Paleoceanography, 2(6), 741-761, https://doi.org/10.1029/PA002i006p00741 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.726768 https://doi.org/10.1594/PANGAEA.726768 |
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.726768 https://doi.org/10.1029/PA002i006p00741 |
_version_ |
1766163531258920960 |