Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau
ODP Leg 119 drilled 11 sites on the Kerguelen Plateau (southern Indian Ocean) and Prydz Bay (East Antarctica). Upper Pliocene through Quaternary sediments were recovered at Site 736 on the northern Kerguelen Plateau; calcareous nannofossils occurred in only a few samples. Over 700 m of middle Eocene...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.728679 2023-05-15T13:42:09+02:00 Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau Wei, Wuchang Thierstein, Hans R MEDIAN LATITUDE: -59.473857 * MEDIAN LONGITUDE: 78.273171 * SOUTH-BOUND LATITUDE: -67.285000 * WEST-BOUND LONGITUDE: 73.032400 * NORTH-BOUND LATITUDE: -50.228000 * EAST-BOUND LONGITUDE: 82.787800 * DATE/TIME START: 1987-12-30T04:30:00 * DATE/TIME END: 1988-02-07T06:30:00 1991-10-21 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.728679 https://doi.org/10.1594/PANGAEA.728679 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.728679 https://doi.org/10.1594/PANGAEA.728679 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wei, Wuchang; Thierstein, Hans R (1991): Upper Cretaceous and Cenozoic calcareous nannofossils of the Kerguelen Plateau (Southern Indian Ocean) and Prydz Bay (East Antarctica). In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 467-492, https://doi.org/10.2973/odp.proc.sr.119.165.1991 119-737A 119-737B 119-738B 119-738C 119-739B 119-739C 119-744A 119-744B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay Dataset 1991 ftpangaea https://doi.org/10.1594/PANGAEA.728679 https://doi.org/10.2973/odp.proc.sr.119.165.1991 2023-01-20T07:31:34Z ODP Leg 119 drilled 11 sites on the Kerguelen Plateau (southern Indian Ocean) and Prydz Bay (East Antarctica). Upper Pliocene through Quaternary sediments were recovered at Site 736 on the northern Kerguelen Plateau; calcareous nannofossils occurred in only a few samples. Over 700 m of middle Eocene through Quaternary sediments was cored at Site 737 on the northern Kerguelen Plateau, and calcareous nannofossils are abundant in the middle Eocene through the middle Miocene sediments. Nearly 500 m of sediments ranging from the lower Turanian to the Quaternary was recovered at Site 738 on the southern Kerguelen Plateau; calcareous nannofossils are abundant from the Miocene downward. Calcareous nannofossils are also abundant in the upper Eocene through Miocene section from Site 744 on the southern Kerguelen Plateau. Except for Core 119-746A-13H, the Neogene sequences drilled at deep-water Sites 745 and 746 off the southern Kerguelen Plateau are devoid of calcareous nannofossils. Occurrences of calcareous nannofossils were generally rare and sporadic at Sites 739 and 742 in Prydz Bay and suggest that the diamictite sequences recovered is as old as middle Eocene-early Oligocene age. Other sites drilled in Prydz Bay (Sites 740, 741, and 743) did not yield calcareous nannofossils. Species diversity of calcareous nannofossils was low (about a dozen) in the southern Indian Ocean in the Late Cretaceous. High-latitude nanno floral characteristics are apparent after the Cretaceous/Tertiary boundary extinctions. Cold climatic conditions limited Oligocene calcareous nannofossil assemblages to fewer than a dozen species, and extinctions of species generally were not compensated by originations of new species. Only a few species of calcareous nannofossils were found in the Miocene sequences, in which Coccolithuspelagicus and one or two species of Reticulofenestra exhibit extreme (0%-100%) fluctuations in assemblage dominance, and these fluctuations may reflect rapid fluctuations in the surface-water temperatures. Further ... Dataset Antarc* Antarctica East Antarctica Prydz Bay PANGAEA - Data Publisher for Earth & Environmental Science East Antarctica Kerguelen Prydz Bay Indian ENVELOPE(73.032400,82.787800,-50.228000,-67.285000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
119-737A 119-737B 119-738B 119-738C 119-739B 119-739C 119-744A 119-744B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay |
spellingShingle |
119-737A 119-737B 119-738B 119-738C 119-739B 119-739C 119-744A 119-744B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay Wei, Wuchang Thierstein, Hans R Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau |
topic_facet |
119-737A 119-737B 119-738B 119-738C 119-739B 119-739C 119-744A 119-744B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg119 Ocean Drilling Program ODP Prydz Bay |
description |
ODP Leg 119 drilled 11 sites on the Kerguelen Plateau (southern Indian Ocean) and Prydz Bay (East Antarctica). Upper Pliocene through Quaternary sediments were recovered at Site 736 on the northern Kerguelen Plateau; calcareous nannofossils occurred in only a few samples. Over 700 m of middle Eocene through Quaternary sediments was cored at Site 737 on the northern Kerguelen Plateau, and calcareous nannofossils are abundant in the middle Eocene through the middle Miocene sediments. Nearly 500 m of sediments ranging from the lower Turanian to the Quaternary was recovered at Site 738 on the southern Kerguelen Plateau; calcareous nannofossils are abundant from the Miocene downward. Calcareous nannofossils are also abundant in the upper Eocene through Miocene section from Site 744 on the southern Kerguelen Plateau. Except for Core 119-746A-13H, the Neogene sequences drilled at deep-water Sites 745 and 746 off the southern Kerguelen Plateau are devoid of calcareous nannofossils. Occurrences of calcareous nannofossils were generally rare and sporadic at Sites 739 and 742 in Prydz Bay and suggest that the diamictite sequences recovered is as old as middle Eocene-early Oligocene age. Other sites drilled in Prydz Bay (Sites 740, 741, and 743) did not yield calcareous nannofossils. Species diversity of calcareous nannofossils was low (about a dozen) in the southern Indian Ocean in the Late Cretaceous. High-latitude nanno floral characteristics are apparent after the Cretaceous/Tertiary boundary extinctions. Cold climatic conditions limited Oligocene calcareous nannofossil assemblages to fewer than a dozen species, and extinctions of species generally were not compensated by originations of new species. Only a few species of calcareous nannofossils were found in the Miocene sequences, in which Coccolithuspelagicus and one or two species of Reticulofenestra exhibit extreme (0%-100%) fluctuations in assemblage dominance, and these fluctuations may reflect rapid fluctuations in the surface-water temperatures. Further ... |
format |
Dataset |
author |
Wei, Wuchang Thierstein, Hans R |
author_facet |
Wei, Wuchang Thierstein, Hans R |
author_sort |
Wei, Wuchang |
title |
Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau |
title_short |
Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau |
title_full |
Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau |
title_fullStr |
Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau |
title_full_unstemmed |
Distribution of calcareous nannofossils in upper Cretaceous and Cenozoic sediments of the Kerguelen Plateau |
title_sort |
distribution of calcareous nannofossils in upper cretaceous and cenozoic sediments of the kerguelen plateau |
publisher |
PANGAEA |
publishDate |
1991 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.728679 https://doi.org/10.1594/PANGAEA.728679 |
op_coverage |
MEDIAN LATITUDE: -59.473857 * MEDIAN LONGITUDE: 78.273171 * SOUTH-BOUND LATITUDE: -67.285000 * WEST-BOUND LONGITUDE: 73.032400 * NORTH-BOUND LATITUDE: -50.228000 * EAST-BOUND LONGITUDE: 82.787800 * DATE/TIME START: 1987-12-30T04:30:00 * DATE/TIME END: 1988-02-07T06:30:00 |
long_lat |
ENVELOPE(73.032400,82.787800,-50.228000,-67.285000) |
geographic |
East Antarctica Kerguelen Prydz Bay Indian |
geographic_facet |
East Antarctica Kerguelen Prydz Bay Indian |
genre |
Antarc* Antarctica East Antarctica Prydz Bay |
genre_facet |
Antarc* Antarctica East Antarctica Prydz Bay |
op_source |
Supplement to: Wei, Wuchang; Thierstein, Hans R (1991): Upper Cretaceous and Cenozoic calcareous nannofossils of the Kerguelen Plateau (Southern Indian Ocean) and Prydz Bay (East Antarctica). In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 467-492, https://doi.org/10.2973/odp.proc.sr.119.165.1991 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.728679 https://doi.org/10.1594/PANGAEA.728679 |
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.728679 https://doi.org/10.2973/odp.proc.sr.119.165.1991 |
_version_ |
1766163604533411840 |