Abstract
High-resolution biostratigraphy has been established on the basis of fossil ostracodes from cores of the Cretaceous Continental Scientific Drilling borehole-Songke 1 (south) (SK1(s)) in the Songliao Basin, northeast China. More than 80 species belonging to 13 genera have been identified and 15 ostracode assemblage zones have been recognized. On the basis of ostracode paleoecological analysis, paleoenvironments, for example lake levels and salinity, have been reconstructed. Two inferred deep-water phases occurred during the deposition of the lower Qingshankou and lower Nenjiang formations, whereas shallower water phases probably occurred during deposition of the upper Quantou and uppermost Qingshankou to Yaojia formations. The salinity of paleo-Songliao lake is interpreted as predominantly freshwater to oligohaline. Oligohaline to mesohaline water environments may have occurred during the first and middle third members of the Qingshankou formation and the lower first and lower second members of the Nenjiang formation.
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Acknowledgments
Financial support was provided by the National Natural Science Foundation of China (project no. 40872016) and the National Project 973 of China (project no. 2006CB701403). The authors acknowledge help of Xi Wang, Hongdou Han, Jianzhong Jia, and Qianping Lei in the field and laboratory work. More thanks go to Dr Carys Bennett, Dr Ricardo, and two reviewers for helping to improve the paper.
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Guest editors: D. A. Dermeval, R. L. Pinto & K. Martens / Ostracoda – Biostratigraphy and Applied Ecology
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Xi, D., Li, S., Wan, X. et al. Late Cretaceous biostratigraphy and paleoenvironmental reconstruction based on non-marine ostracodes from well SK1 (south), Songliao Basin, northeast China. Hydrobiologia 688, 113–123 (2012). https://doi.org/10.1007/s10750-011-0765-6
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DOI: https://doi.org/10.1007/s10750-011-0765-6