globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.12.034
论文题名:
A paleobathymetric transition during the mid-Pliocene warm period: Ostracode evidence from Japan
作者: Iwatani H.; Murai K.; Irizuki T.; Yasuhara M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 399
起始页码: 173
结束页码: 186
语种: 英语
英文关键词: Mid-Pliocene warm period ; Ostracoda ; Q-mode factor analysis ; Sadowara Formation
英文摘要: We reconstructed a paleoenvironment reflecting the mid-Pliocene warm period (MPWP) off the coast of southwest Japan on the basis of high-resolution statistical analysis of fossil ostracodes. A total of 107 ostracode taxa were obtained from the upper part of the mid-Pliocene Sadowara Formation (~. 3.25-3.12. Ma), Shintomi Town, Miyazaki Prefecture, southwest Japan. Most taxa such as Acanthocythereis munechikai, Argilloecia spp., Bradleya albatrossia, Cytheropteron mediotumidum, and Krithe spp. are extant species distributed in the lower sublittoral to upper bathyal zones. These species have been reported in the Pacific coast of southwest Japan, the Tsushima Strait, and off the coast of China. We estimated the paleobathymetry of the Sadowara Formation using Q-mode factor analysis. The results of the factor analysis showed that a regression occurred during deposition of the upper part of the Sadowara Formation. The lower part of the studied sequence was deposited at water depths greater than 300. m. The water depth decreased upward and reached around 250. m in the upper parts of the formation. The timing of the regression corresponds with the peak of the marine isotope stage, KM2. The large regression estimated to have occurred during deposition of the upper part of the Sadowara Formation could have been related to global cooling events during the MPWP. © 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/69398
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作者单位: School of Biological Sciences, Department of Earth Sciences, Swire Institute of Marine Science, The University of Hong Kong, Kadoorie Biological Sciences Building, Pokfulam Road, Hong Kong; Nagasaki Prefectural Government, 2-13 Edo, Nagasaki City, Nagasaki 850-8570, Japan; Department of Geoscience, Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue City, Shimane 690-8504, Japan

Recommended Citation:
Iwatani H.,Murai K.,Irizuki T.,et al. A paleobathymetric transition during the mid-Pliocene warm period: Ostracode evidence from Japan[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,399
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