Latitudinal temperature trends in the northern hemisphere during the Early Cretaceous (Valanginian–Hauterivian)
Latitudinal temperature trends in the northern hemisphere during the Early Cretaceous (Valanginian–Hauterivian)
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早白垩世期间北半球的纬度温度趋势(ValanginianâHauterivian)
DOI:
10.1016/j.palaeo.2015.02.003
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
Mutterlose
中科院分区:
文献类型:
--
作者:
Meissner;Mutterlose
We present the first detailed stable isotope record (δ13C, δ18O) for the Valanginian (Lower Cretaceous) of the southern Boreal Realm. The observations are based on the geochemical analysis of 286 belemnite rostra from stratigraphically well-dated sections in northwest Germany. A major positive carbon isotope excursion (CIE) of ~ 2‰ in the early late Valanginian documents a perturbation of the carbon cycle. This positive CIE, which is well known as the ‘Weissert Event’ in the Tethys, is also displayed in composite carbon isotope records based on published and own data from three different palaeolatitudes (35°, 39°, 65° North). These findings suggest that the environmental changes indicated by the CIE in the early late Valanginian are synchronous, thereby pointing to a global control. The combined oxygen isotope data sets show long-term fluctuations of up to 7 °C with a cooling in the late Valanginian for both the southern and the arctic part of the Boreal Realm, whilst Tethyan data document only a ca. 1 °C cooling. Based on a reliable bio- and chemostratigraphic correlation between the different realms this study highlights the amplitude of the environmental perturbations in the Valanginian and supports the idea that a combination of regional and global factors caused such shifts.
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DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
O. Kuhn;H. Weissert;K. Föllmi;Susanne Hennig
通讯作者:
Susanne Hennig
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
G. Price;B. Passey
通讯作者:
B. Passey
DOI:
--
发表时间:
1992
期刊:
影响因子:
--
作者:
J. Michalík
通讯作者:
J. Michalík
DOI:
--
发表时间:
2012
期刊:
影响因子:
--
作者:
A. Bonin;E. Vennin;E. Pucéat;M. Guiraud;A. Arnaud;T. Adatte;B. Pittet;E. Mattioli
通讯作者:
E. Mattioli
影响因子:
5.3
作者:
H. Wierzbowski;M. Joachimski
通讯作者:
M. Joachimski