Journal ArticleDOI
Oblique subduction, collision of microcontinents and subduction of oceanic ridge: Their implications on the Cretaceous tectonics of Japan
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The Izanagi plate subducted rapidly and obliquely under the accretionary terrane of Japan in the Cretaceous before 85 Ma as mentioned in this paper, and a chain of microcontinents collided with it at about 140 Ma.Abstract:
The Izanagi plate subducted rapidly and obliquely under the accretionary terrane of Japan in the Cretaceous before 85 Ma. A chain of microcontinents collided with it at about 140 Ma. In southwest Japan the major part of it subducted thereafter, but in northeast Japan it accreted and the trench jumped oceanward, resulting in a curved volcanic front. The oblique subduction and the underplated microcon-tinent caused uplifting of high-pressure (high-P) metamorphic rocks and large scale crustal shortening in southwest Japan. The oblique subduction caused left-lateral faulting and ductile shearing in northeast Japan. The arc sliver crossed over the high-temperature (high-T) zone of arc magmatism, resulting in a wide high-T metamorphosed belt. At about 85 Ma, the subduction mode changed from oblique to normal and the tectonic mode changed drastically. Just after this the Kula/Pacific ridge subducted and the subduction rate of the Pacific plate decreased gradually, causing the intrusion of huge amounts of granite magma and the eruption of acidic volcanics from large cauldrons. The oblique subduction of the Pacific plate resumed at 53 Ma and the left-lateral faults were reactivated.read more
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The relationship between Late Cenozoic tectonic events and stress field and basin development in northeast Japan
TL;DR: The regional tectonic stress field, basin development, and crustal deformation of the NE Japan arc in the interval between 32 Ma to the Quaternary can be synthesized based on dike, vein, and fault orientation data, as well as on the compilation of the regional geology as mentioned in this paper.
Journal Article
The relationship between late Cenozoic tectonic events and stress field and basin development in northeast Japan
TL;DR: The regional tectonic stress field, basin development, and crustal deformation of the NE Japan arc in the interval between 32 Ma to the Quaternary can be synthesized based on dike, vein, and fault orientation data, as well as on the compilation of the regional geology.
Journal ArticleDOI
Mesozoic tectono-magmatic response in the East Asian ocean-continent connection zone to subduction of the Paleo-Pacific Plate
Sanzhong Li,Yanhui Suo,Xiyao Li,Jie Zhou,M. Santosh,M. Santosh,Pengcheng Wang,Guangzeng Wang,Lingli Guo,Shengyao Yu,Haoyuan Lan,Liming Dai,Zaizhen Zhou,Xianzhi Cao,Junjiang Zhu,Bo Liu,Suhua Jiang,Gang Wang,Guowei Zhang,Guowei Zhang +19 more
TL;DR: In this article, the authors provide a comprehensive synthesis of the state-of-the-art information from deformation analysis, magmatism, geochronology, tomography and other fields from this region.
Journal ArticleDOI
Major Australian-Antarctic Plate Reorganization at Hawaiian-Emperor Bend Time
Joanne M. Whittaker,Ralph Müller,German Leitchenkov,H. Stagg,M. Sdrolias,Carmen Gaina,Alexey Goncharov +6 more
TL;DR: In this paper, a marked bend in the Hawaiian-Emperor seamount chain supposedly resulted from a recent major reorganization of the plate-mantle system there 50 million years ago.
Journal ArticleDOI
Mesozoic episodic magmatism in South Korea and its tectonic implication
TL;DR: In this article, the crystallization ages of granitoid plutons show three episodes of Mesozoic magmatism in South Korea: Triassic (248-210 Ma), Jurassic (197-158 Ma), and Late Cretaceous-early Tertiary (110-50 m.y.) hiatus.
References
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Journal ArticleDOI
Plate convergence, transcurrent faults, and internal deformation adjacent to Southeast Asia and the western Pacific
TL;DR: In this paper, a model for oblique convergence between plates of lithosphere is proposed in which at least a fraction of slip parallel to the plate margin results in transcurrent movements on a nearly vertical fault which is located on the continental side of a zone of plate consumption.
Journal ArticleDOI
Orogeny and relative plate motions: Example of the Japanese Islands
Shigenori Maruyama,Tetsuzo Send +1 more
TL;DR: The relationship between plate kinematics and orogeny is related to the presence of subduction, and the uplift of low-P/T-type regional metamorphic belts are related to collision episodes as discussed by the authors.
Journal ArticleDOI
Muscovite K-Ar ages of the Sanbagawa schists, Japan and argon depletion during cooling and deformation
Tetsumaru Itaya,Hideo Takasugi +1 more
TL;DR: In this article, the Sanbagawa schists in central Shikoku, Japan have been studied using the K-Ar method and the results show that the ages of the schists are consistently older with increasing metamorphic grade.
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