A complete high-resolution Paleocene benthic stable isotope record for the Central Pacific (ODP Site 1209)

Online Access: Get full text
doi: 10.1029/2010PA002092
Author(s): Westerhold, Thomas; Röhl, Ursula; Donner, Barbara; McCarren, Heather K.; Zachos, James C.
Author Affiliation(s): Primary:
University of Bremen, Center for Marine Environmental Sciences, Bremen, Germany
Other:
University of California-Santa Cruz, United States
Volume Title: Paleoceanography
Source: Paleoceanography, 26(2). Publisher: American Geophysical Union, Washington, DC, United States. ISSN: 0883-8305 CODEN: POCGEP
Note: In English. 95 refs.; illus.
Summary: We have compiled the first stratigraphically continuous high-resolution benthic foraminiferal stable isotope record for the Paleocene from a single site utilizing cores recovered at Pacific ODP Site 1209. The long-term trend in the benthic isotope record suggests a close coupling of volcanic CO2 input and deep-sea warming. Over the short-term the record is characterized by slow excursions with a pronounced periodic beat related to the short (100 kyr) and long (405 kyr) eccentricity cycle. The phase relationship between the benthic isotope record and eccentricity is similar to patterns documented for the Oligocene and Miocene confirming the role of orbital forcing as the pace maker for paleoclimatic variability on Milankovitch time scales. In addition, the record documents an unusual transient warming of 2°C coeval with a 0.6 ppm carbon isotope excursion and a decrease in carbonate content at 61.75 Ma. This event, which bears some resemblance to Eocene hyperthermals, marks the onset of a long-term decline in δ13C. The timing indicates it might be related to the initiation of volcanism along Greenland margin.
Year of Publication: 2011
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; C-13/C-12; Carbon; Cenozoic; Chemostratigraphy; Climate forcing; Cores; Foraminifera; Invertebrata; Isotope ratios; Isotopes; Leg 198; Marine sediments; Microfossils; North Pacific; Northwest Pacific; O-18/O-16; ODP Site 1209; Ocean Drilling Program; Orbital forcing; Oxygen; Pacific Ocean; Paleocene; Paleoclimatology; Paleogene; Paleotemperature; Protista; Sediments; Shatsky Rise; Stable isotopes; Tertiary; West Pacific
Coordinates: N323900 N324000 E1583100 E1583000
Record ID: 2013035829
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data supplied by, and/or abstract, Copyright, American Geophysical Union, Washington, DC, United States