| Paleocene deep-water sediments and radiolarian faunas: Implications for evolution of Yarlung-Zangbo foreland basin, southern Tibet |
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| 作者姓名： | 丁林 |
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| 作者单位： | Institute of |
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| 基金项目： | the Chinese National Key Project，中国科学院资助项目 |
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| 摘 要： | Only a few Paleocene radiolarian assemblages have been reported, while the Early Paleocene zonal schemes remain poorly delineated. The Early Paleocene on-land radiolarians were described in the Hidaka melange belt of Japan and the North Island of New Zeal…
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Paleocene deep-water sediments and radiolarian faunas:Implications for evolution of Yarlung-Zangbo foreland basin, southern Tibet |
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| DING Lin Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing ,China.Paleocene deep-water sediments and radiolarian faunas: Implications for evolution of Yarlung-Zangbo foreland basin, southern Tibet[J].Science in China(Earth Sciences),2003,46(1). |
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| Authors: | DING Lin Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China |
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| Institution: | Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | This is the first report on the Paleocene deep-water sequences and radiolarian faunas, which are distributed along the southern side of the Yarlung-Zangbo suture zone. The Zheba group is coined to indicate these Paleocene sequences which are subsequently divided into two lithostratigraphic units based on the lithology observed in the field. The lower unit characterized by the rhythmic cherts and siliceous shales is named the Sangdanlin formation, and the upper one composed mainly of flysches is termed the Zheya formation. The radiolarian faunas from the Zheba group are assigned to the RP1-RP6 zones of the Paleocene age. The Early Paleocene ra- diolarian assemblages have the potential to be established into the low latitude radiolarian zones and to fill in the gap between the Late Cretaceous and the Late Paleocene radiolarian zonations. The radiolarian dating provides a valuable tool for the regional correlation and reconstruction of the sedimentary environment of the Neo-Tethyan Ocean. The preliminary work shows that the Paleo- cene sequences accumulated in a foreland basin resulted from the southern Asian margin loading onto the northern Indian passive continental margin. The Yarlung-Zangbo foreland basin se- quences deposited on the Indian passive continental margin also resulted in many good source- reservoir-covering assemblages for oil and gas resources. |
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| Keywords: | deep-water sediment radiolarian Paleocene Yarlung-Zangbo foreland basin Tibet |
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