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
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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古新世至始新世最热期 (PETM) 绝对年龄的最新信息:来自关键火山灰层 19 和 â 17 确切地层位置的新见解
DOI:
10.1016/j.epsl.2009.08.027
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发表时间:
2009
影响因子:
5.3
通讯作者:
Zachos
中科院分区:
文献类型:
--
作者:
Westerhold;McCarren;Zachos
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 862kyr and 672kyr, 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 28.02Ma 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., Röhl, 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 28.201Ma 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.
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影响因子:
3.5
作者:
L. Larsen;J. Fitton;A. Pedersen
通讯作者:
A. Pedersen
DOI:
10.2973/dsdp.proc.80.117.1985
发表时间:
1985
期刊:
Palaeogeography, Palaeoclimatology, Palaeoecology
影响因子:
--
作者:
C. Muller
通讯作者:
C. Muller
DOI:
10.1144/gsl.sp.1996.101.01.18
发表时间:
1996
期刊:
Geological Society, London, Special Publications
影响因子:
--
作者:
M. Aubry;W. Berggren;L. Stott;A. Sinha
通讯作者:
A. Sinha
影响因子:
2.7
作者:
R. Knox
通讯作者:
R. Knox
影响因子:
2.3
作者:
H. Egger;E. Brückl
通讯作者:
E. Brückl