Microfacies and carbon isotope records of Mississippian carbonates from the isolated Bama Platform of Youjiang Basin, South China: Possible responses to climate-driven upwelling

Journal article
(Original article)


Publication Details

Author(s): Liu C, Jarochowska E, Du Y, Vachard D, Munnecke A
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology
Publisher: Elsevier
Publication year: 2015
Volume: 438
Pages range: 96-112
ISSN: 0031-0182
Language: English


Abstract


Changes in Mississippian global paleogeography derived from the reconfiguration of the continents have been suggested to result in a change in oceanic circulation, carbon cycling, as well as in global cooling. Here, integrated δC chemostratigraphy and foraminiferal biostratigraphy across the Mississippian (late Tournaisian, Visean, early Serpukhovian; MFZ6-MFZ16 foraminiferal biozones) of the Gongchuan section located in the isolated Bama Platform in the Youjiang Basin, South China, are presented. The δC trend shows an abrupt decline during late Visean (Asbian-early Brigantian; MFZ13-14). This decline is also observed in subequatorial western Euramerica, whereas coeval sections in subequatorial eastern Euramerica show consistently elevated δC values across the entire Visean. The δC decline in western Euramerica and the South China Block (eastern Paleo-Tethys) coincides with a global regression with a suggested glacioeustatic origin, the onset of high-frequency climate and sea-level oscillations, and the closure of the Rheic seaway between Euramerica and Gondwana. We propose a model explaining the divergence of δC records resulting from the closure of the Rheic seaway and development of upwelling zones in the western margin of Euramerica and the eastern Paleo-Tethys realm. Quantitative microfacies analysis across the Mississippian succession in the Gongchuan section shows facies-independent disappearance of corals and increased proportion of cortoids and filter-feeding organisms at the onset of the Asbian δC decline, which may support an increase in nutrient level that can be expected as a result of upwelling.


FAU Authors / FAU Editors

Jarochowska, Emilia Dr.
Lehrstuhl für Paläoumwelt
Munnecke, Axel Prof. Dr.
Professur für Paläontologie (Schwerpunkt Faziesanalyse)


External institutions
China University of Geosciences / 中国地质大学
LILLE 1 University - Science and Technology


How to cite

APA:
Liu, C., Jarochowska, E., Du, Y., Vachard, D., & Munnecke, A. (2015). Microfacies and carbon isotope records of Mississippian carbonates from the isolated Bama Platform of Youjiang Basin, South China: Possible responses to climate-driven upwelling. Palaeogeography, Palaeoclimatology, Palaeoecology, 438, 96-112. https://dx.doi.org/10.1016/j.palaeo.2015.07.048

MLA:
Liu, Chao, et al. "Microfacies and carbon isotope records of Mississippian carbonates from the isolated Bama Platform of Youjiang Basin, South China: Possible responses to climate-driven upwelling." Palaeogeography, Palaeoclimatology, Palaeoecology 438 (2015): 96-112.

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Last updated on 2018-14-12 at 09:44