Latest on the absolute age of the Paleocene-Eocene Thermal Maximum (PETM); new insights from exact stratigraphic position of key ash layers +19 and -17

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doi: 10.1016/j.epsl.2009.08.027
Author(s): Westerhold, Thomas; Rohl, Ursula; McCarren, Heather K.; Zachos, James C.
Author Affiliation(s): Primary:
University of Bremen, Center for Marine Environmental Sciences, Bremen, Federal Republic of Germany
University of California at Santa Cruz, United States
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, 287(3-4), p.412-419. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. Supplemental information/data is available in the online version of this article. 46 refs.; illus., incl. 1 table, sketch map
Summary: We constructed a precise early Eocene orbital cyclostratigraphy for DSDP Site 550 (Leg 80, Goban Spur, North Atlantic) utilizing precession related cycles as represented in a high-resolution X-ray fluorescence based barium core log. Based on counting of those cycles, we constrain the exact timing of two volcanic ash layers in Site 550 which correlate to ashes +19 and -17 of the Fur Formation in Denmark. The ashes, relative to the onset of the Paleocene-Eocene Thermal Maximum (PETM), are offset by 862 kyr and 672 kyr, respectively. When combined with published absolute ages for ash -17, the absolute age for the onset of the PETM is consistent with astronomically calibrated ages. Using the current absolute age of 28.02 Ma for the Fish Canyon Tuff (FCT) standard for calibrating the absolute age of ash -17 is consistent with tuning option 2 in the astronomically calibrated Paleocene time scale of Westerhold et al. (2008) [Westerhold, T., Rohl, U., Raffi, I., Fornaciari, E., Monechi, S., Reale, V., Bowles, J., and Evans, H.F., 2008, Astronomical calibration of the Paleocene time: Palaeogeography, Palaeoclimatology, Palaeoecology, v. 257, p. 377-403]. Using the recently recalibrated absolute age of 28.201 Ma for the FCT standard is consistent with tuning option 3 in the astronomically calibrated Paleocene time scale. The new results do not support the existence of any additional 405-kyr cycle in the early Paleocene astronomically tuned time scale. Abstract Copyright (2009) Elsevier, B.V.
Year of Publication: 2009
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 03 Geochronology; 12 Stratigraphy, Historical Geology and Paleoecology; Absolute age; Alkaline earth metals; Ar/Ar; Atlantic Ocean; Barium; Calibration; Cenozoic; Climate forcing; Correlation; Cyclostratigraphy; DSDP Site 550; Deep Sea Drilling Project; Denmark; Eocene; Europe; Fur Formation; IPOD; Igneous rocks; Iron; Leg 80; Magnetostratigraphy; Metals; North Atlantic; Orbital forcing; Paleocene-Eocene Thermal Maximum; Paleogene; Pyroclastics; Reconstruction; Scandinavia; Spectra; Tephrochronology; Tertiary; Time scales; Volcanic ash; Volcanic rocks; Western Europe; X-ray fluorescence spectra; Zirconium
Coordinates: N483054 N483055 W0132622 W0132623
Record ID: 2010032468
Copyright Information: GeoRef, Copyright 2017 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands