Mesozoic deformation and accretionary orogenic processes around the Nadanhada Terrane

被引：0
|
作者：
Li S. [1 ,2 ]
Zhang Y. [1 ,2 ,3 ]
Guo L. [1 ,2 ]
Suo Y. [1 ,2 ]
Cao H. [1 ,2 ]
Li X. [1 ,2 ]
Zhou Z. [1 ,2 ]
Wang P. [1 ,2 ]
Guo R. [1 ,2 ]
机构：
[1] Key Laboratory of Submarine Geosciences and Prospecting Techniques, Ministry of Education, College of Marine Geosciences, Ocean University of China, Qingdao
[2] Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao
[3] Jiangsu Electric Power Design Institute, Nanjing
来源：
| 1600年 / Science Frontiers editorial department卷 / 24期
关键词：
Accretionary orogenic process; Emplacement age; Nadanhada Terrane; Paleo-Pacific Plate; Subduction initiation; Tectonic nature;
D O I：
10.13745/j.esf.yx.2017-3-14
中图分类号：
学科分类号：
摘要：
The Mesozoic accretionary orogenic processes and deformation responses in the East Asian continental margin have been a major subject of regional geological research in China, and also been a difficult and hot topic on tectonic evolution in East Asia. One of the most crucial scientific problems is the kinematic relationship between the East Asian Margin of the Eurasia Plate and the Paleo-Pacific (Izanagi) Plate in the Mesozoic. The Nadanhada Terrane exposed a set of tectonic mélanges, which is the only evidence of Paleo-Pacific Plate subduction in China, providing the possibility of solving this problem. Based on a large number of the previous and latest studies of petrology, isotope chronology, sedimentary rock assemblages, main faults, magmatic activity, paleontology and paleomagnetic characteristics, this paper tries to determine its tectonic nature, accretionary orogenic processes, emplacement age of the Nadanhada Terrane and the initial time of the Paleo-Pacific Plate subduction. The result is as follows: (1) the Nadanhada accretionary complex consists of the Raohe Complex and the Yuejinshan Complex. The Raohe Complex has the characteristics of the oceanic island basalt (OIB), and there is no ophiolite in the complex, which is not as that previously considered. The Yuejinshan Complex as a typical ophiolite is characterized by the mid-oceanic ridge basalt (MORB), indicating that the Paleo-Pacific subduction was in the latest Triassic and the time of the emplacement of the Nadanhada Terrane in the present location was during the 136-131 Ma. (2) The Nadanhada and Mino-Tamba-Ashio terranes as Jurassic accretionary wedges have similar sedimentary rock assemblages and ages, radiolarian types and distribution, and structural history. There should have been a unified super-terrane before the opening of the Japan Sea in the Miocene. © 2017, Editorial Office of Earth Science Frontiers. All right reserved.
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页码：200 / 212
页数：12
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