globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.03.017
论文题名:
Marine incursion events in the Late Cretaceous Songliao Basin: Constraints from sulfur geochemistry records
作者: Huang Y.; Yang G.; Gu J.; Wang P.; Huang Q.; Feng Z.; Feng L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 385
起始页码: 152
结束页码: 161
语种: 英语
英文关键词: Cretaceous ; Marine incursion events ; Songliao Basin ; Sulfur geochemistry
英文摘要: Songliao Basin in NE China developed the most productive oilfield in the world sourced from terrestrial rocks. The main source rock of the basin includes member 1 of the Qingshankou (K2qn1) and members 1 and 2 of the Nenjiang Formation (K2nj1-2). However the exact reasons for the formation of the source rock, especially the K2qn1 are still controversial. Former paleontological and organic geochemical research suggested that organic matter was deposited during marine incursion events of K2qn1 but further geochemical evidence is needed. This paper explores the distinct sulfate levels that distinguish marine from fresh waters of the Songliao paleo-lake. We undertook a systematic investigation the sulfur geochemistry of the sediments from top of member 4 of the Quantou Formation (K1q4) to top of member 1 of the Qingshankou (K2qn1). The ratio of organic carbon to the pyrite sulfur (TOC/PYS) proved the previously suggested saline conditions during the deposition of K2qn1; and the pyrite sulfur isotope indicated that marine incursion may not only have occurred for K2qn1, but also for top of K1q4. The exact time for the beginning of marine incursion is to be determined. The marine incursion within K2qn1 is not strong and partially controlled by the fluctuation of paleo-lake level. The present study will be helpful for understanding the contribution of marine incursion events to the burial of organic carbon in the Songliao paleo-lake, although further studies are still needed. © 2013 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/69705
Appears in Collections:过去全球变化的重建

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作者单位: State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, China; School of the Earth Science and Resources, China University of Geosciences, Beijing 100083, China; School of Engineering and Technology, China University of Geosciences, Beijing 100083, China; Institute of Oil Exploration and Development, Daqing Oilfield Company, Daqing 163712, China; Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China; Oil and Gas Survey, China Geological Survey, Beijing 100029, China

Recommended Citation:
Huang Y.,Yang G.,Gu J.,et al. Marine incursion events in the Late Cretaceous Songliao Basin: Constraints from sulfur geochemistry records[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,385
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