|
| 作者 | Liu, Tong2,3; Liu, Chuanzhou2,3; Wu, Fuyuan2,3; Ji, Wenbin1; Zhang, Chang2,3 ; Zhang, Weiqi2; Zhang, Zhenyu2
|
| 刊名 | SCIENCE CHINA-EARTH SCIENCES
 |
| 出版日期 | 2023-11-15
|
| 页码 | 20 |
| ISSN号 | 1674-7313
|
| 关键词 | Neo-Tethys Ocean
Wilson Cycle
Yarlung Zangbo suture zone
Melange
Ocean island basalt
Tethyan geodynamics
|
| DOI | 10.1007/s11430-023-1175-5
|
| 英文摘要 | The evolution and final closure of the Neo-Tethys Ocean are one of the most important geological events that have occurred on Earth since the Mesozoic. However, the evolution of the Neo-Tethys is not well constrained, in particular whether its opening occurred in the Permian or the Triassic and whether a plume was involved with its opening or not. In this study, we present geochronological and geochemical data for mafic igneous rocks in melanges along the Yarlung Zangbo suture zone (YZSZ) in southern Tibet to constrain the timing and mechanism of opening the Neo-Tethys Ocean. Based on field observations, the YZSZ melanges can be divided into three segments. The western (west of Zhongba) and eastern (Sangsang-Renbu) segments are composed of ocean plate stratigraphy representing accretionary complexes that formed during subduction of Neo-Tethyan oceanic lithosphere beneath the southern margin of the Asian continent. Melanges in the central segment (Zhongba-eastern Saga) typically have a siliciclastic matrix, and represent Tethyan Himalayan strata that were structurally mixed with the southern margin of the Asian continent. Based on our and previously published geochemical data, the mafic rocks in the YZSZ melanges are ocean island basalt (OIB)-like, with ages in the Late Permian-Middle Triassic, the Middle-Late Jurassic, and the Early Cretaceous, respectively. An OIB-like block with an age of ca. 253 Ma is identified from the Zhongba melanges in the western segment, and it is the oldest OIB lithology yet identified in the YZSZ melanges related to the evolution of the Neo-Tethys Ocean. Geochemical features indicate that this OIB-like block is distinct from typical OIBs and would be formed during continental rifting to incipient seafloor spreading. In the framework of plate divergent-convergent coupling systems and based on literature data for early Middle Triassic seamounts, radiolarian cherts, and normal mid-ocean ridge basalt-like oceanic crust, we conclude that opening of the Yarlung Zangbo Neo-Tethys Ocean would mainly occur at similar to 250-243 Ma in the Early Triassic, not later than the early phase of Middle Triassic. In addition, a mantle plume was not involved in opening the Yarlung Zangbo Neo-Tethys Ocean. On the other hand, we have also identified a suite of ca. 160 Ma OIB-like basaltic sills from the Bainang melanges in the eastern segment, which is the same age as the OIB lithologies previously reported in the Zhongba melanges. Based on the sill-like occurrence and absence of plume-related rock associations in this region, the Bainang OIB-like rocks might result from Middle-Late Jurassic continental rifting in northern Gondwana. Magmatism related to this tectonic event is preserved in both the YZSZ melanges and Himalayan strata, but its tectonic significance requires further investigation. Based on this study of the YZSZ melanges and the previous studies of YZSZ ophiolites, Gangdese belt igneous rocks, and sedimentary rocks, we have reconstructed the entire Wilson Cycle of the Yarlung Zangbo Neo-Tethys Ocean, mainly involving continental rifting and ocean opening, subduction initiation, ultraslow-spreading ridge-trench conversion, subduction re-initiation, and oceanic closure and initial India-Asia collision for the tectonic emplacement of ophiolites. These processes were associated not only with magmatic flare-ups and lulls in the Gangdese belt but also with two stages of ophiolite obduction. Our data therefore provide new insights into the evolution of the Yarlung Zangbo Neo-Tethys Ocean and related Tethyan geodynamics. |
| WOS关键词 | LARGE IGNEOUS PROVINCE
; ZIRCON U-PB
; PERMIAN BRACHIOPOD FAUNA
; SUBDUCTION-ACCRETION PROCESSES
; HF ISOTOPIC CONSTRAINTS
; TECTONIC EVOLUTION
; SOUTHERN TIBET
; TSANGPO SUTURE
; NEOTETHYAN SUBDUCTION
; XIGAZE OPHIOLITE
|
| 资助项目 | The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than[42025201]
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than[92155001]
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than[41802062]
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than[41888101]
; National Natural Science Foundation of China[2019QZKK0801]
; Second Tibetan Plateau Scientific Expedition and Research Program
|
| WOS研究方向 | Geology
|
| 语种 | 英语
|
| 出版者 | SCIENCE PRESS
|
| WOS记录号 | WOS:001106509500001
|
| 资助机构 | The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; The authors thank Zhenhua XUE (China University of Geosciences, Wuhan) for assistance in the field, and Xiaoxiao LING, Jiao LI (SIMS Laboratory, IGGCAS), and Yueheng YANG (MC-ICP-MS Laboratory, IGGCAS) for help with the analyses. Tong LIU also than
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; National Natural Science Foundation of China
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
; Second Tibetan Plateau Scientific Expedition and Research Program
|
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110641]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室
|
| 通讯作者 | Liu, Tong |
| 作者单位 | 1.Northwest Univ, Dept Geol, Xian 710069, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
|
推荐引用方式
GB/T 7714 |
Liu, Tong,Liu, Chuanzhou,Wu, Fuyuan,et al. Timing and mechanism of opening the Neo-Tethys Ocean: Constraints from mélanges in the Yarlung Zangbo suture zone[J]. SCIENCE CHINA-EARTH SCIENCES,2023:20.
|
| APA |
Liu, Tong.,Liu, Chuanzhou.,Wu, Fuyuan.,Ji, Wenbin.,Zhang, Chang.,...&Zhang, Zhenyu.(2023).Timing and mechanism of opening the Neo-Tethys Ocean: Constraints from mélanges in the Yarlung Zangbo suture zone.SCIENCE CHINA-EARTH SCIENCES,20.
|
| MLA |
Liu, Tong,et al."Timing and mechanism of opening the Neo-Tethys Ocean: Constraints from mélanges in the Yarlung Zangbo suture zone".SCIENCE CHINA-EARTH SCIENCES (2023):20.
|
