Tectonically restricted deep-ocean circulation at the end of the Cretaceous greenhouse

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doi: 10.1016/j.epsl.2013.03.019
Author(s): Voigt, Silke; Jung, Claudia; Friedrich, Oliver; Frank, Martin; Teschner, Claudia; Hoffmann, Julia
Author Affiliation(s): Primary:
Goethe-Universität Frankfurt, Institute of Geosciences, Frankfurt, Germany
Other:
Helmholtz Centre for Ocean Research Kiel, Germany
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, Vol.369-370, p.169-177. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. Supplemental information/data is available in the online version of this article. 69 refs.; illus., incl. sketch maps
Summary: The evolution of global ocean circulation toward deep-water production in the high southern latitudes is thought to have been closely linked to the transition from extreme mid-Cretaceous warmth to the cooler Cenozoic climate. The relative influences of climate cooling and the opening and closure of oceanic gateways on the mode of deep-ocean circulation are, however, still unresolved. Here we reconstruct intermediate- to deep-water circulation for the latest Cretaceous based on new high-resolution radiogenic neodymium (Nd) isotope data from several sites and for different water depths in the South Atlantic, Southern Ocean, and proto-Indian Ocean. Our data document the presence of markedly different intermediate water Nd-isotopic compositions in the South Atlantic and Southern Ocean. In particular, a water mass with a highly radiogenic Nd isotope signature most likely originating from intense hotspot-related volcanic activity bathed the crest of Walvis Ridge between 71 and 69 Ma, which formed a barrier that prevented deep-water exchange between the Southern Ocean and the North Atlantic basins. We suggest that the Cenozoic mode of global deep-ocean circulation was still suppressed by tectonic barriers in the latest Cretaceous, and that numerous, mostly regionally-formed and sourced intermediate to deep waters supplied the deep ocean prior to 68 million yr ago. Abstract Copyright (2013) Elsevier, B.V.
Year of Publication: 2013
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Cretaceous; DSDP Site 525; Deep Sea Drilling Project; Deep-water environment; Exmouth Plateau; Ferromanganese crusts; Greenhouse effect; IPOD; Indian Ocean; Isotope ratios; Isotopes; Leg 113; Leg 122; Leg 74; Maud Rise; Mesozoic; Metals; Nd-144/Nd-143; Neodymium; North Atlantic; ODP Site 690; ODP Site 762; Ocean Drilling Program; Ocean circulation; Paleo-oceanography; Paleoclimatology; Rare earths; Reconstruction; South Atlantic; Southern Ocean; Stable isotopes; Tectonics; Walvis Ridge; Weddell Sea
Coordinates: S290415 S290414 E0025908 E0025907
S195315 S195314 E1121515 E1121514
S650938 S650937 E0011218 E0011218
Record ID: 2013070460
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands
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100 1 |a Voigt, Silke  |u Goethe-Universität Frankfurt, Institute of Geosciences, Frankfurt 
245 1 0 |a Tectonically restricted deep-ocean circulation at the end of the Cretaceous greenhouse 
300 |a p. 169-177 
500 |a In English. Supplemental information/data is available in the online version of this article. 69 refs. 
500 |a Research program: DSDP Deep Sea Drilling Project 
500 |a Research program: IPOD International Phase of Ocean Drilling 
500 |a Research program: ODP Ocean Drilling Program 
500 |a Affiliation: Goethe-Universität Frankfurt, Institute of Geosciences; Frankfurt; DEU; Germany 
500 |a Affiliation: Helmholtz Centre for Ocean Research Kiel; ; DEU; Germany 
500 |a Source note: Earth and Planetary Science Letters, Vol.369-370, p.169-177. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X 
500 |a Publication type: journal article 
504 |b 69 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands 
520 |a The evolution of global ocean circulation toward deep-water production in the high southern latitudes is thought to have been closely linked to the transition from extreme mid-Cretaceous warmth to the cooler Cenozoic climate. The relative influences of climate cooling and the opening and closure of oceanic gateways on the mode of deep-ocean circulation are, however, still unresolved. Here we reconstruct intermediate- to deep-water circulation for the latest Cretaceous based on new high-resolution radiogenic neodymium (Nd) isotope data from several sites and for different water depths in the South Atlantic, Southern Ocean, and proto-Indian Ocean. Our data document the presence of markedly different intermediate water Nd-isotopic compositions in the South Atlantic and Southern Ocean. In particular, a water mass with a highly radiogenic Nd isotope signature most likely originating from intense hotspot-related volcanic activity bathed the crest of Walvis Ridge between 71 and 69 Ma, which formed a barrier that prevented deep-water exchange between the Southern Ocean and the North Atlantic basins. We suggest that the Cenozoic mode of global deep-ocean circulation was still suppressed by tectonic barriers in the latest Cretaceous, and that numerous, mostly regionally-formed and sourced intermediate to deep waters supplied the deep ocean prior to 68 million yr ago. Abstract Copyright (2013) Elsevier, B.V. 
650 7 |a Cretaceous  |2 georeft 
650 7 |a Deep Sea Drilling Project  |2 georeft 
650 7 |a Deep-water environment  |2 georeft 
650 7 |a Ferromanganese crusts  |2 georeft 
650 7 |a Greenhouse effect  |2 georeft 
650 7 |a Isotope ratios  |2 georeft 
650 7 |a Isotopes  |2 georeft 
650 7 |a Mesozoic  |2 georeft 
650 7 |a Metals  |2 georeft 
650 7 |a Nd-144/Nd-143  |2 georeft 
650 7 |a Neodymium  |2 georeft 
650 7 |a Ocean circulation  |2 georeft 
650 7 |a Ocean Drilling Program  |2 georeft 
650 7 |a Paleo-oceanography  |2 georeft 
650 7 |a Paleoclimatology  |2 georeft 
650 7 |a Rare earths  |2 georeft 
650 7 |a Reconstruction  |2 georeft 
650 7 |a Stable isotopes  |2 georeft 
650 7 |a Tectonics  |2 georeft 
651 7 |a Atlantic Ocean  |2 georeft 
651 7 |a DSDP Site 525  |2 georeft 
651 7 |a Exmouth Plateau  |2 georeft 
651 7 |a Indian Ocean  |2 georeft 
651 7 |a IPOD  |2 georeft 
651 7 |a Leg 113  |2 georeft 
651 7 |a Leg 122  |2 georeft 
651 7 |a Leg 74  |2 georeft 
651 7 |a Maud Rise  |2 georeft 
651 7 |a North Atlantic  |2 georeft 
651 7 |a ODP Site 690  |2 georeft 
651 7 |a ODP Site 762  |2 georeft 
651 7 |a South Atlantic  |2 georeft 
651 7 |a Southern Ocean  |2 georeft 
651 7 |a Walvis Ridge  |2 georeft 
651 7 |a Weddell Sea  |2 georeft 
700 1 |a Jung, Claudia, 
700 1 |a Friedrich, Oliver, 
700 1 |a Frank, Martin, 
700 1 |a Teschner, Claudia, 
700 1 |a Hoffmann, Julia, 
773 0 |t Earth and Planetary Science Letters  |d Amsterdam : Elsevier, May 2013  |x 0012-821X  |y EPSLA2  |n Earth and Planetary Science Letters, Vol.369-370, p.169-177. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X Publication type: journal article  |g Vol. 369-370  |h illus., incl. sketch maps 
856 |u urn:doi: 10.1016/j.epsl.2013.03.019