DOI: 10.1016/j.palaeo.2013.05.017
论文题名: Astrochronology for the Early Cretaceous Jehol Biota in northeastern China
作者: Wu H. ; Zhang S. ; Jiang G. ; Yang T. ; Guo J. ; Li H.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 385 起始页码: 221
结束页码: 228
语种: 英语
英文关键词: Astrochronology
; Early Cretaceous
; Jehol Biota
; Northeastern China
; Yixian Formation
英文摘要: The Early Cretaceous Jehol Biota in northeastern China provides an evolutionary window for 'feathered' dinosaurs, primitive birds, insects and early flowering plants. It also provides critical information for the biodiversity changes of the Early Cretaceous terrestrial ecosystem. Here we report a time series analysis for the 11.2-m-thick, fossil-bearing lacustrine deposits at the Sihetun section in western Liaoning, northeastern China on the basis of high-resolution magnetic susceptibility (MS) and anhysteretic remanent magnetization (ARM) measurements. A hierarchy of sedimentary cycle bands of 120-260. cm, 50-67. cm and 18-42. cm was recorded in the MS and ARM series. With available radioisotope age constraints from the same section, sedimentary cycles of 120-260. cm, 50-67. cm and 18-42. cm were interpreted as Milankovitch cycles of short eccentricity (130 and 95. kyr), obliquity (36.6 and 46. kyr), and precession (22.1, 20.9 and 18. kyr), respectively. The 100. kyr-tuned 'floating' astronomical time scale indicates that the duration of the 11.2-m-thick section is ~. 0.67. Myr and the average depositional rate is ~. 1.70. cm/kyr. The duration of the 1.8-m-thick, main fossil-bearing interval that contains 8 beds of 'feathered' dinosaur/primitive bird fossils can be estimated as short as 150. kyr. The results suggest that climate fluctuations manifested in paleobotanical, sedimentological and geochemical records of the Yixian Formation may have been controlled by orbital forcing during Early Cretaceous. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69697
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 Ocean Science, China University of Geosciences, Beijing 100083, China; Department of Geoscience, University of Nevada, Las Vegas, NV 89154, United States; Department of Geological Science, University of Missouri, Columbia, MO 65211, United States
Recommended Citation:
Wu H.,Zhang S.,Jiang G.,et al. Astrochronology for the Early Cretaceous Jehol Biota in northeastern China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,385