Evolution of the Sea of Japan back-arc and some unsolved issues

Horne, Anne Van; Satō, Hiroshi; Ishiyama, Tatsuya

doi:10.1016/j.tecto.2016.08.020

Cited by 64 publications

(54 citation statements)

References 148 publications

(153 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Van Horne et al () estimated that a total of ~500 km of extension occurred in the northeastern Japan Sea. Structural and seismic investigations suggest that the eastern Japan Sea margin experienced ESE‐directed, that is, trench‐perpendicular, extension from ~17 to 18 Ma, following the main phase of spreading in the Japan Sea (Sato, ; van der Werff, ).…”

Section: Reviewmentioning

confidence: 99%

“…The cessation of back‐arc opening of the Japan Sea is considered to be at ~15 Ma (e.g., Jolivet et al, ; Martin, ; Van Horne et al, ). In the southwestern Japan Sea, this is marked by basin inversion at ~15.5 Mathat resulted from NW‐SE compression, indicated by broad anticlines and thrust faults along the southern margin of the Tsushima/Ulleung Basin (Kim et al, ; Lee et al, , ; Lee & Kim, ).…”

Section: Reviewmentioning

confidence: 99%

“…We reconstruct the onset of rifting between SW Japan and the Korean peninsula at 23 to 18 Ma and follow Kim et al (, ) in reconstructing 70 km SE‐directed motion of SW Japan relative to the Korean peninsula during this stage, involving 60–70 km of extension at the southeastern margin of Korea to ~100 km between present‐day North Korea and the Noto peninsula. For the northeast Japan Sea, we restore up to 100 km of 23–20 Ma extension between NE Honshu and stable Eurasia to represent the southeast‐directed motion of NE Japan as a result of initial intra‐arc rifting (Van Horne et al, ). We model this extension perpendicular to the Japan Trench, consistent with the opening direction of (half‐) grabens in the northern Japan Sea (Sato, ; van der Werff, ).…”

Section: Reconstruction Of Nw Pacific Active Marginsmentioning

confidence: 99%

See 2 more Smart Citations

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

2019

View full text Add to dashboard Cite

The Eocene (~50–45 Ma) major absolute plate motion change of the Pacific plate forming the Hawaii‐Emperor bend is thought to result from inception of Pacific plate subduction along one of its modern western trenches. Subduction is suggested to have started either spontaneously, or result from subduction of the Izanagi‐Pacific mid‐ocean ridge, or from subduction polarity reversal after collision of the Olyutorsky arc that was built on the Pacific plate with NE Asia. Here we provide a detailed plate‐kinematic reconstruction of back‐arc basins and accreted terranes in the northwest Pacific region, from Japan to the Bering Sea, since the Late Cretaceous. We present a new tectonic reconstruction of the intraoceanic Olyutorsky and Kronotsky arcs, which formed above two adjacent, oppositely dipping subduction zones at ~85 Ma within the north Pacific region, during another Pacific‐wide plate reorganization. We use our reconstruction to explain the formation of the submarine Shirshov and Bowers Ridges and show that if marine magnetic anomalies reported from the Aleutian Basin represent magnetic polarity reversals, its crust most likely formed in an ~85‐ to 60‐Ma back‐arc basin behind the Olyutorsky arc. The Olyutorsky arc was then separated from the Pacific plate by a spreading ridge, so that the ~55‐ to 50‐Ma subduction polarity reversal that followed upon Olyutorsky‐NE Asia collision initiated subduction of a plate that was not the Pacific. Hence, this polarity reversal may not be a straightforward driver of the Eocene Pacific plate motion change, whose causes remain enigmatic.

show abstract

Section: Reviewmentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

Section: Reconstruction Of Nw Pacific Active Marginsmentioning

confidence: 99%

See 1 more Smart Citation

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

2019

View full text Add to dashboard Cite

show abstract

“…This implies that the thinning of crust, sedimentary basin development, and the upwelling of asthenosphere mantle started before 32 Ma. The Sea of Japan is now floored by mafic oceanic rocks with compositions similar to those of mid-oceanic ridge basalts (Nohda et al, 1988;Van Horne et al, 2017). The widening of the Sea through crustal thinning, and rotation of the Japanese (Fe 3+ ) is from the wustite-magnetite buffer at low fO 2 to magnetite-hematite buffer at high fO 2 , calculated at 800 C using the values of Meyers and Eugster (1983).…”

Section: Magmatic Activity In Japanese Islandsmentioning

confidence: 99%

Porphyry Copper Potential in Japan Based on Magmatic Oxidation State

Hattori

2018

Resource Geology

View full text Add to dashboard Cite

The formation of large porphyry Cu deposits requires shallow intrusion of felsic stocks that are injected into the focused sites of the mineralization. The parental magmas for these igneous rocks are oxidized, with a fO2 above FMQ + 2 (2 logarithmic units above fO2 of fayalite‐magnetite‐quartz buffer), which enables the magmas to transport large amounts of S and metals. The Japanese islands contain continental and island‐arc magmatic belts of various ages, from Mesozoic to recent, that were formed in response to westward subduction of oceanic plates. Mesozoic–Paleocene magmatism formed arcs on the eastern margin of Eurasia before the opening of the Sea of Japan. The back‐arc rifting that formed the Sea of Japan separated these igneous rocks from Eurasia, with their relics exposed as volcano–plutonic belts in Japan. Among these, the San‐in belt is the only representative of an upper crustal section that includes magnetite‐bearing granitic rocks. The opening of the Sea of Japan was accompanied by the asthenospheric mantle upwelling and eruption of oceanic magma. This was followed by extensive Miocene submarine volcanic activity that formed the Green Tuff belt. The current configuration of the Japanese islands was established in Pliocene. Young arcs, such as the Kuril, Izu‐Bonin, and Ryukyu arcs, are largely composed of mafic magmas, with accompanying asthenospheric upwelling in back‐arc extension. As the asthenospheric mantle and associated magmas have a reduced fO2, below FMQ (fayalite‐magnetite‐quartz buffer), continual upwelling of asthenospheric mantle creates limited areas of potential porphyry Cu mineralization in Japanese islands. Possible prospective areas include young stratovolcanoes in Honshu and Kyushu islands. Fertile rocks that may be associated with porphyry Cu mineralization can be identified by evaluating their magmatic oxidation conditions through mineralogical and mineral chemistry studies.

show abstract

“…The appearance of different clusters around Japan may be attributed to whether or not there are sediments in the crust, as well as to variations in the upper mantle due to differences in the subducting slabs. The area in cluster 6 in northern Japan is characterized by a deeper Moho relative to the rest of Japan and is overlain with Neogene and Quaternary sediments (Van Horne et al, 2017;D. Zhao & Hasegawa, 1993).…”

Section: Cluster Centroid S Velocity Modelsmentioning

confidence: 99%

S Velocity Model of East Asia From a Cluster Analysis of Localized Dispersion

et al. 2018

View full text Add to dashboard Cite

We measured Rayleigh wave group velocity dispersion curves from station pair cross correlations of continuous broadband data from 1,082 seismic stations in regional networks across China, Korea, and Japan. The dispersion curves are localized in the period range 6–40 s to produce group velocity maps, which we then combine with group velocity data in the period range 50–133 s from the global dispersion model of Ma et al. (2014, https://doi.org/10.1093/gji/ggu246). Cluster analysis performed on the local dispersion curves reveals distinct tectonic regions and provides a new way of estimating the number of regions needed to describe a surface wave dispersion data set. We inverted the centroid dispersion curves corresponding to each cluster for a new set of reference models. We used a combination of teleseismic receiver functions and Moho depths from the LITHO1.0 model to create a 3‐D Moho depth reference model and then constructed a 3‐D S velocity model by jointly inverting group velocities with localized phase velocities in the period range 28.57–200 s, also from Ma et al. (2014, https://doi.org/10.1093/gji/ggu246). The cluster analysis and comparisons with other regional models provide evidence for a broad region of deformed lithosphere in East Asia. We image high velocities in the Yangtze and Ordos cratons and low velocities underneath the East Sea (Sea of Japan), and we find that a low‐velocity zone in the midcrust is appropriate for Tibet. The model we present is intended as an alternative reference model that fits a broader range of periods to be used for further studies of regional geophysical phenomena.

show abstract

Evolution of the Sea of Japan back-arc and some unsolved issues

Cited by 64 publications

References 148 publications

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

Reconstruction of Subduction and Back‐Arc Spreading in the NW Pacific and Aleutian Basin: Clues to Causes of Cretaceous and Eocene Plate Reorganizations

Porphyry Copper Potential in Japan Based on Magmatic Oxidation State

S Velocity Model of East Asia From a Cluster Analysis of Localized Dispersion

Contact Info

Product

Resources

About