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Magnetostratigraphy of the middle-upper Jurassic sedimentary sequences at Yanshiping, Qiangtang Basin, China
Song, CH (Song, Chunhui)1,2; Zeng, YY (Zeng, Yongyao)1,2; Yan, MD (Yan, Maodu)3,4; Wu, S (Wu, Song)1,2; Fang, XM (Fang, Xiaomin)3,4; Bao, J (Bao, Jing)1,2; Zan, JB (Zan, Jinbo)3,4; Liu, XF (Liu, Xifang)5,6; Song, CH
Source PublicationGEOPHYSICAL JOURNAL INTERNATIONAL
2016
Volume206Issue:3Pages:1847-1863
DOI10.1093/gji/ggw199
AbstractA series of important geological events occurred in the Tibetan Plateau area during the Jurassic, such as the collision of the Lhasa and Qiangtang Terranes, the closure of the Meso-Tethyan Ocean, the opening of the Neo-Tethyan Ocean and the cessation of the mega-monsoon. The similar to 3000 m thick Jurassic sedimentary sequence in the Qiangtang Basin on the central Tibetan Plateau, which is called the Yanshiping (YSP) Group, recorded these geological events. However, the chronology of the sequence is surprisingly poorly constrained. Here, we perform a detailed palaeomagnetic analysis on the similar to 1060 m thick middle and upper portions of the YSP Group (the Xiali and Suowa Formations) in the YSP section of the eastern Qiangtang Basin. Three bivalve zones at stratigraphic intervals of similar to 40-140, 640-800 and 940-1040 m are identified, which yield a Bathonian-Callovian age for the Lower Xiali Fm., a Callovian-Oxfordian age for the Lower Suowa Fm. and an Oxfordian-Kimmeridgian age for the Upper Suowa Fm. A total of 544 oriented palaeomagnetic samples were collected from the section. By combining thermal and alternating field demagnetizations, clear characteristic remanent magnetization (ChRM) directions are isolated for most of the samples. The robust ChRM directions pass fold and reversals tests, which support the primary nature of the ChRMs and yield a palaeopole at 76.8A degrees N/297.2A degrees E (dp = 2.2A degrees, dm = 3.7A degrees). A total of 27 normal and 26 reversed polarity zones were successfully recorded in the section. Combined with fossil age constraints, results suggest that the section is plausibly composed of a Callovian-Early Kimmeridgian age sedimentary sequence.
Subject Area地质学
WOS IDWOS:000384650400028
Language英语
Indexed BySCI
KeywordPolarity Time-scale Resolution Magneto Stratigraphy Ne Tibetan Plateau Tectonic Evolution Northern Tibet Quiet Zone Dinoflagellate Cysts Qinghai Province Collision Growth
Cooperation Status国际
Department碰撞与隆升
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/7611
Collection图书馆
Corresponding AuthorSong, CH
Affiliation1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China
2.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China
3.Chinese Acad Sci, Inst Tibetan Plateau Res, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
4.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China
5.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China
6.Minist Land & Resources, Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China
Recommended Citation
GB/T 7714
Song, CH ,Zeng, YY ,Yan, MD ,et al. Magnetostratigraphy of the middle-upper Jurassic sedimentary sequences at Yanshiping, Qiangtang Basin, China[J]. GEOPHYSICAL JOURNAL INTERNATIONAL,2016,206(3):1847-1863.
APA Song, CH .,Zeng, YY .,Yan, MD .,Wu, S .,Fang, XM .,...&Song, CH.(2016).Magnetostratigraphy of the middle-upper Jurassic sedimentary sequences at Yanshiping, Qiangtang Basin, China.GEOPHYSICAL JOURNAL INTERNATIONAL,206(3),1847-1863.
MLA Song, CH ,et al."Magnetostratigraphy of the middle-upper Jurassic sedimentary sequences at Yanshiping, Qiangtang Basin, China".GEOPHYSICAL JOURNAL INTERNATIONAL 206.3(2016):1847-1863.
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