DOI: 10.1016/j.palaeo.2012.10.024
论文题名: Late Cretaceous stratigraphy, Songliao Basin, NE China: SK1 cores
作者: Wan X. ; Zhao J. ; Scott R.W. ; Wang P. ; Feng Z. ; Huang Q. ; Xi D.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 385 起始页码: 31
结束页码: 43
语种: 英语
英文关键词: Biostratigraphy
; Chronostratigraphy
; Late Cretaceous
; Songliao Basin
英文摘要: The Songliao Basin is the largest Cretaceous oil and gas-producing lacustrine basin in China, with its greatest aerial extent in the middle Cretaceous. A coring program (SK1) has to date yielded 2485.89m of continuous core (96.46% recovery) and provides significant material for Cretaceous research. The sequence of the core consists mainly of lacustrine sandstone, dark grey mudstone, shale and oil-shale. The Upper Cretaceous stratigraphic section has been subdivided into the Quantou, Qingshankou, Yaojia, Nenjiang, Sifangtai and Mingshui formations in ascending order. Late Cretaceous microfossils are diverse and abundant. A detailed biostratigraphic study has subdivided the sequence into high precision biozones: 21 ostracode assemblages, 10 phytoplankton assemblages, 7 palynological zones and 4 charophyta assemblages, respectively. In addition, marine foraminifera were first discovered from the basin. Three 206Pb/238U ages and one 40Ar/39Ar age were analysed. Ten local magnetozones have been recognised in the SK1 (North), and two magnetozones have been indicated in the SK1 (South). Based on biostratigraphy, high-resolution magnetostratigraphy and SIMS U-Pb zircon analyses, the SK1 stratigraphy is correlated with Upper Cretaceous stages in the International Geologic Time Scale. The upper part of the Quantou Formation is the lower Turonian; the Qingshankou Formation is the upper Turonian-lower Coniacian; the Yaojia Formation is from the upper Coniacian to middle Santonian; the Nenjiang Formation is the upper Santonian to middle Campanian; the Sifangtai Formation is limited to the upper Campanian; and the Mingshui Formation is the uppermost Campanian to Maastrichtian. It is likely that the upper part of the Mingshui Formation belongs to the Paleocene, and the K/Pg boundary is within the Member 2 of the Mingshui Formation around the depth of 328m by new micropalaeontologic and magnetostratigraphic data. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69699
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, Xueyuan Lu 29, Beijing 100083, China; Department of Geosciences, University of Tulsa, Tulsa, OK 74104, United States; College of Earth Sciences, Jilin University, Changchun 130061, China; Exploration and Development Research Institute of Daqing Oil Field Corporation Ltd., Daqing, Heilongjiang 163712, China
Recommended Citation:
Wan X.,Zhao J.,Scott R.W.,et al. Late Cretaceous stratigraphy, Songliao Basin, NE China: SK1 cores[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,385