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Stratigraphic and paleontological constraints on the opening time of the Bangong-Nujiang Ocean
Zhang YiChun1; Zhang YuJie2; Yuan DongXun1; Xu HaiPeng1,3; Qiao Feng1,3
2019
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume35Issue:10Pages:3083-3096
AbstractThe opening time of the Bangong-Nujiang Ocean has been a contentious issue for a long time. The correlations of sequences and paleobiogeography can constrain the opening time of the Bangong-Nujiang Ocean. From the viewpoint of the depositional sequences, the whole Lhasa Block has evidenced a stable transition from elastic rocks to carbonates after the Late Paleozoic glaciation. By contrast, the South Qiangtang Block varies a lot in depositional sequences. The western South Qiangtang Block has uplifted after the deposition of the Lower Permian Tunlonggongba Formation that results in an unconformity between the Tunlonggongba Formation and the Upper Permian Jipuria Group. The eastern South Qiantang Block, however, is characterized by a sequence of basalts and carbonates during the Middle Permian. In paleobiogeography, the South Qiangtang Block yields the fusuline Palaeofusulina fauna during the Late Permian. This fauna is absent in the whole Lhasa Block. During the Middle Permian, the fusuline Eopolydiexodina fauna in the South Qiangtang Block contrasts with the dominant Nankinella-Chusenella fauna in the Lhasa Block. In addition, the South Qiangtang Block is dominated by warm-water fusulines, brachiopods and corals during the late Early Permian. But, these warm-water taxa have not been documented from the Lhasa Block so far. The Bangong-Nujiang Ocean is considered to have formed a considerable width during the Middle Permian based on their contrast differences in depositional sequences and paleobiogeography between the South Qiangtang Block and the Lhasa Block. Consequently, the Bangong-Nujiang Ocean is considered to have opened before the Middle Permian but after the Early Permian deglaciation event.
DOI10.18654/1000-0569/2019.10.08
Language英语
WOS KeywordPERMIAN FUSULINE FAUNA ; CENTRAL LHASA BLOCK ; ZIRCON U-PB ; NORTHERN TIBET ; TECTONIC EVOLUTION ; XIALA FORMATION ; WESTERN YUNNAN ; XAINZA AREA ; QIANGTANG BLOCK ; BAOSHAN BLOCK
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000491168800008
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nigpas.ac.cn/handle/332004/27854
Collection中国科学院南京地质古生物研究所
Corresponding AuthorZhang YiChun
Affiliation1.Chinese Acad Sci, Ctr Excellence Life & Paleoenvironm, Nanjing Inst Geol & Palaeontol, State Key Lab Palaeobiol & Stratig, Nanjing 210008, Jiangsu, Peoples R China
2.China Geol Survey, Chengdu Ctr, Chengdu 610081, Sichuan, Peoples R China
3.Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China
First Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Corresponding Author AffilicationNanjing Institute of Geology and Palaeonotology,CAS
Recommended Citation
GB/T 7714
Zhang YiChun,Zhang YuJie,Yuan DongXun,et al. Stratigraphic and paleontological constraints on the opening time of the Bangong-Nujiang Ocean[J]. ACTA PETROLOGICA SINICA,2019,35(10):3083-3096.
APA Zhang YiChun,Zhang YuJie,Yuan DongXun,Xu HaiPeng,&Qiao Feng.(2019).Stratigraphic and paleontological constraints on the opening time of the Bangong-Nujiang Ocean.ACTA PETROLOGICA SINICA,35(10),3083-3096.
MLA Zhang YiChun,et al."Stratigraphic and paleontological constraints on the opening time of the Bangong-Nujiang Ocean".ACTA PETROLOGICA SINICA 35.10(2019):3083-3096.
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