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 Publication | GEOPHYSICAL JOURNAL INTERNATIONAL |
2016 | |
Volume | 206Issue:3Pages:1847-1863 |
DOI | 10.1093/gji/ggw199 |
Abstract | A 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 ID | WOS:000384650400028 |
Language | 英语 |
Indexed By | SCI |
Keyword | Polarity 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 |
Subtype | Article |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.itpcas.ac.cn/handle/131C11/7611 |
Collection | 图书馆 |
Corresponding Author | Song, CH |
Affiliation | 1.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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