P-wave velocity structure in the northern part of the central Japan Basin, Japan Sea with ocean bottom seismometers and airguns

Sato, Takeshi; Shinohara, Masanao; Karp, Baruch; Kulinich, R; Isezaki, Nobuhiro

doi:10.1186/bf03352509

Cited by 29 publications

(26 citation statements)

References 22 publications

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“…Crustal velocities and crustal thicknesses differ somewhat (average is 13 km and 15 km, respectively), but are within estimated error. Although crustal thickness may vary from 10 km [ Sato et al , 2004] to more than 20 km [ Kurashimo et al , 1996] across the Sea of Japan, by setting the starting Moho depth to 20 km we are able to estimate mantle velocities reliably and recover crustal velocities and thicknesses to within estimated errors. Further discussion of crustal thickness beneath the Sea of Japan is presented in section 6.2, which describes the observed anticorrelation between crustal thickness and seafloor depth and provides further support for the argument that crustal thickness is relatively well determined beneath the area.…”

Section: Construction Of the 3‐d Modelmentioning

confidence: 99%

Crust and uppermost mantle beneath the North China Craton, northeastern China, and the Sea of Japan from ambient noise tomography

Zheng

Shen

Zhou³

et al. 2011

J. Geophys. Res.

153

128

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A 3‐D shear velocity model of the crust and uppermost mantle to a depth of 100 km is presented beneath the North China Craton (NCC), northeastern China, the Korean Peninsula, and the Sea of Japan. Ambient noise Rayleigh wave tomography is applied to data from more than 300 broadband seismic stations from Chinese provincial networks (CEArray), the Japanese F‐Net, and the IRIS Global Seismic Network. Continuous data from 2007 to 2009 are used to produce group and phase velocity maps from 8 s to 45 s periods. The model is motivated to constrain the distributed intraplate volcanism, crustal extension, cratonic rejuvenation, and lithospheric thinning that are hypothesized for the study region. Numerous robust features are observed that impose new constraints on the geometry of these processes, but discussion concentrates only on four. (1) The North‐South Gravity Lineament follows the ∼40 km contour in crustal thickness, and crustal thickness is anticorrelated with water depth beneath the Sea of Japan, consistent with crustal isostasy for a crust with laterally variable composition. (2) The lithosphere is thin (∼70 km) beneath the Songliao‐Bohai Graben but seismically fast. (3) Even thinner more attenuated lithosphere bounds three sides of the eastern NCC (in a horseshoe shape), identifying a region of particularly intense tectonothermal modification where lithospheric rejuvenation may have reached nearly to the base of the crust. (4) Low‐velocity anomalies reach upward (in a Y shape) in the mantle beneath the eastern and western borders of the Sea of Japan, extending well into continental East Asia in the west, and are separated by a ∼60 km thick lithosphere beneath the central Sea of Japan. This anomaly may reflect relatively shallow slab dehydration in the east and in the west may reflect deeper dehydration and convective circulation in the mantle wedge overlying the stagnant slab.

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Section: Construction Of the 3‐d Modelmentioning

confidence: 99%

Crust and uppermost mantle beneath the North China Craton, northeastern China, and the Sea of Japan from ambient noise tomography

Zheng

Shen

Zhou³

et al. 2011

J. Geophys. Res.

153

128

View full text Add to dashboard Cite

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“…В 1990 и 1996 гг. выполнено два сейсмических эксперимента ГСЗ (Hirata et al, 1992;Sato et al, 2004). В последующие годы были продолжены комплексные исследования возвышенностей Первенца, Богорова, Витязя, проведены профильные и площадные геофизические исследования Центральной котловины в пределах экономической зоны России (Дальневосточные …, 2007; Зимин, 2002; Кулинич, Валитов, 2011).…”

Section: история геолого-геофизических исследованийunclassified

“…В 1996 г. в совместной российско-японской экспедиции сотрудниками ТОИ ДВО РА Н и у ниверситета г. Чиба, в 18-м рейсе НИС «Профессор Гагари нск и й», юж нее возвышенности Тарасова отработан профиль ГСЗ № 3 (J96_3) (Sato et al, 2004). На этом профиле были получены качественные материалы, позволившие получить надежные скоростные модели земной коры для Центральной котловины.…”

Section: история геолого-геофизических исследованийunclassified

“…Скоростные параметры коры определены по материалам сейсмических экспериментов 1990 г. и 1996 г. Наиболее качественные материалы получены на профиле J96_3. Первые результаты интерпретации этих данных были опубликованы в работах (Дальневосточные …, 2007;Sato et al, 2004). Нами проведена переинтерпретация материалов сейсмического эксперимента 1996 г. с использованием современных методов решени я обратны х к инемати ческ и х за дач для двумерно-неоднородной среды и с применением технологии обработки, названной кинематической миграцией (Медведев, 2015; 2016 Рис.…”

Section: структура верхней части разрезаunclassified

“…Расхождения рассчитанных глубин залегания поверхности Мохо по данным спутниковой и морской гравиметрии не превышают 1 км (Кулинич, Валитов, 2011). Сопоставление полученных результатов с данными ГСЗ (Hirata et al, 1992;Sato et al, 2004) показало их хорошую сходимость -расхождения не превысили 12%. Рассчитанные значения были использованы для построения карта изоглубин поверхности Мохо для Центральной котловины и ее обрамления (рис.…”

Section: аномальное гравитационное полеunclassified

See 2 more Smart Citations

The Central Basin of the Sea of Japan: History and Tectonics

Прокудин¹,

Sedin²,

Валитов³

et al. 2018

Bulletin KRAESC. Earth Sciences

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Seismic constraints of the formation process on the back‐arc basin in the southeastern Japan Sea

Sato

Kodaira

et al. 2014

JGR Solid Earth

Self Cite

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To clarify the formation process of the back-arc basin in the Japan Sea, which is located next to the northwestern Pacific, a seismic survey using ocean bottom seismographs and an air gun array was undertaken in areas from the northern Yamato Basin to the coast of the northeastern Japan Island Arc off Awa-shima Island. The crust beneath the northern Yamato Basin off Awa-shima Island is approximately 16 km thick. The upper and lower crusts are, respectively, about 5 km thick with a steep velocity gradient and about 10 km thick with a gentle velocity gradient. In the basin, there are very few units with P wave velocity of 5.4-6.0 km/s, corresponding to the continental upper crust. The crustal structure of the northern Yamato Basin has characteristics of thicker oceanic crust. The high-velocity lowermost crust in the northern Yamato Basin with 7.2-7.4 km/s might show melt formed by a slightly high mantle temperature during the opening of the basin. However, the crust beneath the areas from the Sado Ridge to the coast, which is approximately 25-26 km thick, is slightly thinner than that of the continental crust and island arc crust. The crustal structure beneath this area is inferred to be a rifted continental and/or a rifted island arc crust.

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P-wave velocity structure in the northern part of the central Japan Basin, Japan Sea with ocean bottom seismometers and airguns

Cited by 29 publications

References 22 publications

Crust and uppermost mantle beneath the North China Craton, northeastern China, and the Sea of Japan from ambient noise tomography

Crust and uppermost mantle beneath the North China Craton, northeastern China, and the Sea of Japan from ambient noise tomography

The Central Basin of the Sea of Japan: History and Tectonics

Seismic constraints of the formation process on the back‐arc basin in the southeastern Japan Sea

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