A magneto- and chemostratigraphically calibrated dinoflagellate cyst zonation of the early Palaeogene South Pacific Ocean

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doi: 10.1016/j.earscirev.2013.04.010
Author(s): Bijl, Peter K.; Sluijs, Appy; Brinkhuis, Henk
Author Affiliation(s): Primary:
Utrecht University, Department of Earth Sciences, Utrecht, Netherlands
Volume Title: Earth-Science Reviews
Source: Earth-Science Reviews, Vol.124, p.1-31. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-8252 CODEN: ESREBW
Note: In English. Includes appendices. 190 refs.; illus., incl. 2 tables
Summary: Investigation of the early Palaeogene palaeoecological and palaeoclimatological evolution of the Polar Regions is hindered by the absence of calcite microfossils in sedimentary archives, which are conventionally the main dating tool. To overcome this problem, we have generated large datasets of organic dinoflagellate cyst (dinocyst) assemblages from Southern Ocean shelf sediments over the past decade, and we here calibrate these to the Geomagnetic Polarity Time Scale (GPTS) using magnetostratigraphy and stable isotope stratigraphy. This now for the first time allows a high-resolution Southern Pacific Ocean dinocyst zonation for the late Palaeocene to late Eocene (58-36 million years ago; Ma). We compile published dinocyst chronologies from Ocean Drilling Program (ODP) Hole 1171D on the South Tasman Rise, Hole 1172A/D on the East Tasman Plateau and Integrated Ocean Drilling Program (IODP) Hole U1356A on the Wilkes Land margin. Correlation to dinocyst zonations from New Zealand lead to revisions of the magnetostratigraphic age model at Holes 1171D and 1172A/D. Stable carbon and oxygen isotope records reveal the stratigraphic location of the Palaeocene-Eocene Thermal Maximum (∼56 Ma) and the Middle Eocene Climatic Optimum (∼40 Ma), respectively. The resulting zonation consists of thirteen dinocyst zones, calibrated to the Geomagnetic Polarity Time Scale (GPTS) of Vandenberghe et al. (2012), which can likely be applied to the entire Southern Ocean. Finally, we apply the revised stratigraphy to all published TEX86 data, a biomarker-based proxy for sea surface temperature (SST), from ODP Site 1172 to assess long-term climate evolution. This shows that Southwest Pacific SST trends mimic the global compilation of benthic foraminiferal oxygen isotopes even better than previously appreciated. Abstract Copyright (2013) Elsevier, B.V.
Year of Publication: 2013
Research Program: IODP Integrated Ocean Drilling Program
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Assemblages; Australasia; Australia; Biostratigraphy; Biozones; Cenozoic; Chemostratigraphy; Dinoflagellata; Expedition 318; IODP Site U1356; Integrated Ocean Drilling Program; Leg 189; Lower Paleogene; Magnetostratigraphy; Marine sediments; Microfossils; Middle Eocene Climatic Optimum; ODP Site 1171; ODP Site 1172; Ocean Drilling Program; Pacific Ocean; Paleocene-Eocene Thermal Maximum; Paleoclimatology; Paleoecology; Paleogene; Paleomagnetism; Paleotemperature; Palynomorphs; Polar regions; Sea-surface temperature; Sediments; South Pacific; Southern Ocean; Southwest Pacific; Tasman Sea; Tasmania Australia; Tertiary; West Pacific
Coordinates: S483000 S482900 E1490700 E1490600
Record ID: 2014040899
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands