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Jurassic-Cretaceous radiolarian biostratigraphy and sedimentary environments of the Ceno-Tethys: records from the Xialu Chert in the Yarlung-Zangbo Suture Zone, southern Tibet
Matsuoka, A; Yang, Q (杨群); Kobayashi, K; Takei, M; Nagahashi, T; Zeng, QG; Wang, YJ (王玉净)
2002-02-01
Source PublicationJOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
Volume20Issue:3Pages:277-287
Abstract

Radiolarian biostratigraphic research has been carried Out along two continuous sections through the Xialu Chert, one of the accreted sheets included in the Yarlung-Zangbo Suture Zone. Six radiolarian zones have been identified as follows: Laxtorum(?) jurassicum Zone (Aalenian), Tricolocapsa plicarum Zone (Bujocian-lower Bathonian), Stylocapsa(?) spiralis Zone (upper Callovian-Oxfordian), Hsuum maxwelli Zone (Kimmeridgian), Pseudodictyomitra carpatica Zone (upper Tithonian-lower Valanginian), and Turbocapsula costata Zone (Aptian). A reconstructed stratigraphy of the Xialu Chert, based on lithological succession and radiolarian dating, indicates that the chert exhibits a long depositional history, at least from early Middle Jurassic (Aalenian) to late Early Cretaceous (Aptian). The separation of the Lhasa Block from the northern Gondwana margin must, therefore, be dated before them Aalenian. The absence of calcareous sediments in the Xialu Chert indicates that the oceanic basin was deeper than the CCD throughout the depositional history. The transition from chert to siliceous mudstone is recorded sometime in Early Cretaceous, most probably around the Barremian/Aptian boundary. This means that the oceanic plate had already started being consumed at a trench by that time. The accretion of the Xialu Chert occurred after the Aptian time. (C) 2002 Elsevier Science Ltd. All rights reserved.

KeywordRadiolaria Jurassic Cretaceous Ceno-tethys Paleoceanography Accretion Xialu Chert Yarlung-zangbo Suture Zone
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000172661900011
PublisherPERGAMON-ELSEVIER SCIENCE LTD
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Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/1133
Collection中国科学院南京地质古生物研究所
其他
Corresponding AuthorMatsuoka, A
Affiliation1.Niigata Univ, Fac Sci, Dept Geol, Niigata 9502181, Japan
2.Acad Sinica, Nanjing Inst Geol & Palaeontol, Nanjing 210008, Peoples R China
3.Niigata Univ, Grad Sch, Niigata 9502181, Japan
4.Inst Geol Sci Tibet, Lhasa 851400, Peoples R China
Recommended Citation
GB/T 7714
Matsuoka, A,Yang, Q ,Kobayashi, K,et al. Jurassic-Cretaceous radiolarian biostratigraphy and sedimentary environments of the Ceno-Tethys: records from the Xialu Chert in the Yarlung-Zangbo Suture Zone, southern Tibet[J]. JOURNAL OF ASIAN EARTH SCIENCES,2002,20(3):277-287.
APA Matsuoka, A.,Yang, Q .,Kobayashi, K.,Takei, M.,Nagahashi, T.,...&Wang, YJ .(2002).Jurassic-Cretaceous radiolarian biostratigraphy and sedimentary environments of the Ceno-Tethys: records from the Xialu Chert in the Yarlung-Zangbo Suture Zone, southern Tibet.JOURNAL OF ASIAN EARTH SCIENCES,20(3),277-287.
MLA Matsuoka, A,et al."Jurassic-Cretaceous radiolarian biostratigraphy and sedimentary environments of the Ceno-Tethys: records from the Xialu Chert in the Yarlung-Zangbo Suture Zone, southern Tibet".JOURNAL OF ASIAN EARTH SCIENCES 20.3(2002):277-287.
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