IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Paleo-megalake termination in the Quaternary: Paleomagnetic andwater-level evidence from south Bohai Sea, China
Yi,L(Yi,Liang)[1,3]; Deng,CL(Deng,Chenglong)[1]; Xu,XY(Xu,Xingyong)[2]; Yu,HJ(Yu,Hongjun)[2]; Qiang,XK(Qiang,Xiaoke)[4]; Jiang,XY(Jiang,Xingyu)[5]; Chen,YP(Chen,Yanping)[6]; Su,Q(Su,Qiao)[2]; Chen,GQ(Chen,Guangquan)[2]; Li,P(Li,Ping)[2]; Ge,JY(Ge,Junyi)[7]; Li,Y(Li,Yan)[8]
Source PublicationSedimentary Geology
AbstractAsian marginal seas play an important role in moderating material and energy flux linkages between Asia and the Northwest Pacific, and thus have profound climatic and environmental effects. In this study, by combining paleomagnetic study with sediment grain-size analysis on the Lz908 borehole sedimentary sequence from the southern Bohai Sea, new insights into regional geomorphological process since the late early Pleistocene are obtained. The main results are as follows. (1) Paleomagnetic findings suggest that the sequence recorded the Brunhes normal chron and the late Matuyama reverse chron, including the Jaramillo normal subchron. (2) The sedimentary processes in the study area since 1327 ka show a three-stage pattern, with depositional rates of 4.3, 17 and 107 cm/ka during 1327–260 ka (later part of the early and middle Pleistocene), 260–10 ka (late middle and late Pleistocene), and the Holocene, respectively. (3) The sedimentary basin was a part of the Bohai Paleolakes (BHPL) prior to 260 ka, whose water levels were consistently higher than 3 m above the present-day level. After 260 ka, seawater entered the Bohai basin, and relative sea level cyclically fluctuated with global sea-level changes. We therefore infer that the Miaodao Islands, which were the natural barrier of the BHPL blocking seawater entry, had partially subsided before 260 ka, only allowing seawater to enter the basin during a global sea-level maximum. The BHPL terminated around 260 ka, and the “barrier” subsided completely around ~ 130 ka, causing the Bohai basin to become an inner shelf sea.
KeywordBohai Paleolakes Magnetostratigraphy Water level reconstruction Quaternary
Indexed BySCI
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Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China;
2.Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;
3.MSG group, Sanya Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, Sanya 572000, China;
4.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710061, China;
5.Tianjin Centre, China Geological Survey, Tianjin 300170, China;
6.Key Laboratory of Engineering Oceanography, Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China;
7.Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, Beijing 100044, China;
8.School of Ocean Sciences, China University of Geosciences, Beijing 100083, China
Recommended Citation
GB/T 7714
Yi,L,Deng,CL,Xu,XY,et al. Paleo-megalake termination in the Quaternary: Paleomagnetic andwater-level evidence from south Bohai Sea, China[J]. Sedimentary Geology,2015,319(2015):1-12.
APA Yi,L.,Deng,CL.,Xu,XY.,Yu,HJ.,Qiang,XK.,...&Li,Y.(2015).Paleo-megalake termination in the Quaternary: Paleomagnetic andwater-level evidence from south Bohai Sea, China.Sedimentary Geology,319(2015),1-12.
MLA Yi,L,et al."Paleo-megalake termination in the Quaternary: Paleomagnetic andwater-level evidence from south Bohai Sea, China".Sedimentary Geology 319.2015(2015):1-12.
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