Tectonic forcings of Maastrichtian ocean-climate evolution

Frank, T. D. and Arthur, M. A. (1999) Tectonic forcings of Maastrichtian ocean-climate evolution. Paleoceanography, 14 2: 103-117. doi:10.1029/1998PA900017


Author Frank, T. D.
Arthur, M. A.
Title Tectonic forcings of Maastrichtian ocean-climate evolution
Journal name Paleoceanography   Check publisher's open access policy
ISSN 0883-8305
Publication date 1999
Sub-type Critical review of research, literature review, critical commentary
DOI 10.1029/1998PA900017
Volume 14
Issue 2
Start page 103
End page 117
Total pages 15
Editor M. L. Delaney
Place of publication Washington, D.C.
Publisher American Geophysical Union
Collection year 1999
Language eng
Subject C1
780104 Earth sciences
260104 Sedimentology
Abstract A global compilation of deep-sea isotopic records suggests that Maastrichtian ocean-climate evolution tvas tectonically driven. During the early Maastrichtian the Atlantic intermediate-deep ocean was isolated from the Pacific, Indian, and Southern Oceans; deep water formed in the high-latitude North Atlantic and North Pacific. At the early/late Maastrichtian boundary a major reorganization of oceanic circulation patterns occurred, resulting in the development of a thermohaline circulation system similar to that of the modem oceans. A combination of isotopic and plate kinematic data suggests that this event was triggered by the final breaching of tectonic sills in the South Atlantic and the initiation of north-south flow of intermediate and deep water in the Atlantic. The onset of Laramide tectonism during the mid Maastrichtian led to the concurrent draining of major epicontinental seaways. Together, these events caused cooling, increased latitudinal temperature gradients, increased ventilation of the deep ocean, and affected a range of marine biota.
Keyword Geosciences, Multidisciplinary
Oceanography
Paleontology
Paleocene Magnetic Stratigraphy
Cretaceous-tertiary Boundary
Southern High-latitudes
Project Leg 74
Planktonic-foraminifera
Isotopic Evidence
Atlantic Ocean
Sea-water
Circulation
Paleotemperature
Q-Index Code C1

Document type: Journal Article
Sub-type: Critical review of research, literature review, critical commentary
Collection: Earth Systems Science Computational Centre Publications
 
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Created: Tue, 10 Jun 2008, 13:54:28 EST