globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.10.029
论文题名:
Late Pennsylvanian aridification on the southwestern margin of Gondwana (Paganzo Basin, NW Argentina): A regional expression of a global climate perturbation
作者: Gulbranson E.L.; Montañez I.P.; Tabor N.J.; Oscar Limarino C.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 417
起始页码: 220
结束页码: 235
语种: 英语
英文关键词: Gondwana ; Ice age ; Late Paleozoic ; Paleoclimate ; Paleosol ; Pennsylvanian
英文摘要: Paleosols of the Paganzo Group preserve a shift from the cool climate of the glaciated high-latitudes of Gondwana to a long-term aridification punctuated by shorter-term fluctuations in moisture regime in the late Carboniferous. A quantitative reconstruction of paleoclimate inferred from the major element chemistry of paleosol horizons and the stable isotope geochemistry of soil-formed minerals and organic matter indicates that the climate varied substantially during deglaciation along the southwestern margin of Gondwana in the Middle Pennsylvanian including two geologically abrupt shifts to notably drier conditions. This dynamic climate terminates in a dry subhumid moisture regime characterized by steppe/dry scrub floral provinces. Quantitative estimates of net primary production during the post-glacial interval inferred from paleosol major element geochemistry are consistent with a mesic soil temperature regime, in agreement with paleotemperatures inferred from pedogenic goethite δD and δ18O. Contemporaneous aridification is well expressed in paleotropical continental records with Middle to Late Pennsylvanian aridification coincident with an abrupt evolutionary change in many marine and terrestrial species. The synchrony of aridification between the high and low paleo-latitudes and concomitant major restructuring of some ecosystems suggests that a paleoclimate change of global nature occurred during the Moscovian and Kasimovian. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69131
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作者单位: Department of Geosciences, University of Wisconsin-Milwaukee, Milwaukee, WI, United States; Department of Earth and Planetary Sciences, University of California-Davis, One Shields Ave., Davis, CA, United States; Huffington Department of Earth Sciences, Southern Methodist University, Dallas, TX, United States; Department of Geology, University of Buenos Aires, Cuidad Universitaria, Pabellón II, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Cientificas y Técnicas (CONICET), Sarmiento 440, Buenos Aires, Argentina

Recommended Citation:
Gulbranson E.L.,Montañez I.P.,Tabor N.J.,et al. Late Pennsylvanian aridification on the southwestern margin of Gondwana (Paganzo Basin, NW Argentina): A regional expression of a global climate perturbation[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,417
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