Earliest Cretaceous accretion of Neo-Tethys oceanic subduction along the Yarlung Zangbo Suture Zone, Sangsang area, southern Tibet
文献类型:期刊论文
作者 | Cai, FL (Cai, Fu-Long)2,4; Ding, L (Ding, Lin)2,4; Kapp, P (Kapp, Paul)3; Li, S (Li, Shun)2; Fan, SQ (Fan, Shuai-Quan)1; Xu, Q (Xu, Qiang)2,4; Clinkscales, C (Clinkscales, Christopher)3; Yue, YH (Yue, Ya-Hui)2,4; Wang, HQ (Wang, Hou-Qi)2,3 |
刊名 | TECTONOPHYSICS |
出版日期 | 2018-12-02 |
卷号 | 744期号:0页码:373-389 |
ISSN号 | 0040-1951 |
关键词 | Xigaze Fore-arc Zircon U-pb India-asia Collision Lhasa Terrane Implications Volcanic-rocks Neotethyan Subduction Tsangpo Suture Facies Architecture Plate Stratigraphy Tectonic Evolution |
DOI | 10.1016/j.tecto.2018.07.024 |
英文摘要 | The accretionary complex of the Yarlung Zangbo Suture Zone (YZSZ) in southern Tibet records the subduction-accretion process of Neo-Tethys oceanic lithosphere. We report field observations, petrographic analysis, detrital zircon U-Pb geochronology, and Hf isotope data of one sedimentary-matrix melange unit of YZSZ in Sangsang area, central southern Tibet. This melange unit is the northernmost, and presumably the oldest one within the YZSZ accretionary complex. The sandstone matrix and blocks are rich in volcanic detritus, linking the main provenance to a juvenile magmatic arc. U-Pb-Hf analysis of detrital zircons from the sandstones reveals a unimodal age population of similar to 186-121 Ma with high positive epsilon Hf(t) values of +6.67 to +14.58, consistent with derivation from Gangdese Arc on southern margin of Lhasa terrane. The maximum depositional age of the melange unit is limited to be 149-134 Ma by averaging the youngest detrital zircon ages. The sandstones of this melange unit probably deposited in the trench basin within a few million years of early accretion driven by the Neo-Tethys oceanic subduction. The development of arc-trench system verified the initiation of subduction of Neo-Tethys oceanic lithosphere in Early Jurassic. Our results and integration of previous studies on subduction-accretion process of Neo-Tethys subduction indicate that the accretionary complex in Sangsang area documented at least two stages of accretion processes, stage 1 in earliest Cretaceous and stage 2 in Late Cretaceous, separated by a period of forearc extension forming the Yarlung Zangbo Ophiolites. These two stages of accretion correspond to growth and erosion of Gangdese Arc and crustal shortening in southern Eurasian margin. |
学科主题 | 地质学 |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000445987000025 |
源URL | [http://ir.itpcas.ac.cn/handle/131C11/8523] |
专题 | 青藏高原研究所_图书馆 |
通讯作者 | Wang, HQ (Wang, Hou-Qi) |
作者单位 | 1.China Hua You Grp Corp, Yinchuan Co, Yinchuan 750011, Peoples R China. 2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Continental Collis & Plateau Uplift, Beijing 100101, Peoples R China; 3.Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA; 4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; |
推荐引用方式 GB/T 7714 | Cai, FL ,Ding, L ,Kapp, P ,et al. Earliest Cretaceous accretion of Neo-Tethys oceanic subduction along the Yarlung Zangbo Suture Zone, Sangsang area, southern Tibet[J]. TECTONOPHYSICS,2018,744(0):373-389. |
APA | Cai, FL .,Ding, L .,Kapp, P .,Li, S .,Fan, SQ .,...&Wang, HQ .(2018).Earliest Cretaceous accretion of Neo-Tethys oceanic subduction along the Yarlung Zangbo Suture Zone, Sangsang area, southern Tibet.TECTONOPHYSICS,744(0),373-389. |
MLA | Cai, FL ,et al."Earliest Cretaceous accretion of Neo-Tethys oceanic subduction along the Yarlung Zangbo Suture Zone, Sangsang area, southern Tibet".TECTONOPHYSICS 744.0(2018):373-389. |
入库方式: OAI收割
来源:青藏高原研究所
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