The Sea of Okhotsk crust from deep seismic sounding data

Пийп, В. Б.; Rodnikov, A. G.

doi:10.2205/2003es000140

Cited by 22 publications

(17 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ophiolite complexes that may be associated with the East Sakhalin arc are preserved on the Schmidt peninsula in northernmost Sakhalin (Nokleberg et al, 2000;Piip & Rodnikov, 2004;Raznitsin, 2012;Rodnikov et al, 2013; Figures 1 and 4), and are thought to continue offshore eastern Sakhalin based on gravity and magnetic anomalies (Raznitsin, 2012;Rodnikov et al, 2013), and deep seismic profiles (Piip & Rodnikov, 2004). The lowest structural unit of the Schmidt ophiolite complex consists of a serpentinite mélange with Upper Jurassic-Early Cretaceous radiolarian cherts (Nokleberg et al, 2000).…”

Section: Sakhalinmentioning

confidence: 99%

“…The Okhotsk Sea forms an approximately 1,500-km-long and 800-km-wide marginal sea bounded by the Kamchatka peninsula to the east and separated from the Pacific Ocean to the south by the Kuril island arc and trench ( Figure 1). The Okhotsk Sea is underlain by continental crust that varies in thickness from >25 km below the submarine rises to 20-25 km below the troughs (Gnibidenko & Khvedchuk, 1982;Piip & Rodnikov, 2004;Piskarev et al, 2012;Rodnikov et al, 2013;Savostin et al, 1983). Magmatic rocks recovered from the basement highs are dominated by Lower to Upper Cretaceous granitoids and felsic volcanics (Gnibidenko & Khvedchuk, 1982;Lelikov & Pugachev, 2016).…”

Section: Okhotsk Sea and Kuril Arcmentioning

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

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: Sakhalinmentioning

confidence: 99%

Section: Okhotsk Sea and Kuril Arcmentioning

confidence: 99%

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

“…The basement of the Okhotsk Sea Plate consists of continental crust and overlying strata and volcanic rocks of Cretaceous and older ages (Worrall et al, ). Deep seismic sounding data show that in the central part of the Okhotsk Sea Plate the depth of the Moho surface is greater than 30 km, which suggests, along with dredging data, the development of the continental crust (Piip & Rodnikov, ). Geophysical investigations show that the continental crust of the Okhotsk Sea Plate consists of ~10‐km‐thick granitic layer and ~15‐km‐thick basaltic layer (Verzhbitsky & Kononov, ).…”

Section: Introductionmentioning

confidence: 97%

“…The Okhotsk Sea Plate is a continental plate with most parts currently residing below the Okhotsk Sea (Jolivet, 1987;Maruyama et al, 1997;Piip & Rodnikov, 2004;Rodnikov et al, 2013). The basement of the Okhotsk Sea Plate consists of continental crust and overlying strata and volcanic rocks of Cretaceous and older ages (Worrall et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Timing of Okhotsk Sea Plate Collision With Eurasia Plate: Zircon U‐Pb Age Constraints From the Sakhalin Island, Russian Far East

et al. 2018

View full text Add to dashboard Cite

The Late Mesozoic to Cenozoic evolution of Northeast Asia involves successive subduction of the Pacific oceanic crust and amalgamation of the Eurasia, North American, and Okhotsk Sea Plates. The timing of plate collision is essential for understanding the tectonic evolution of Northeast Asia. In this study, we focus on the Okhotsk Sea Plate collision with the Eurasia Plate along the Sakhalin Island, Russian Far East, which is a highly controversial problem, especially about the timing of collision. In order to determine exact timing for this collision, we report zircon U‐Pb data from both the East Sakhalin accretionary complex and postcollisional granitic plutons in the Sakhalin Island. Detrital zircon data from four metasedimentary rocks show that the Sikhote‐Alin orogenic belt is the main provenance for the East Sakhalin accretionary complex. Meanwhile, the youngest detrital zircon age constrains the maximum depositional age of East Sakhalin accretionary complex later than 49 Ma. Both Langeri and Val'za plutons are made of peraluminous S‐type granite. Four granitic samples yielded consistent ages at 36–38 Ma, indicating that both plutons were emplaced at the middle Eocene. Their generation is considered to have been derived through crustal anatexis of accretionary wedge in the lower crust shortly after tectonic thickening caused by the Okhotsk Sea Plate collision with the Eurasia Plate. Consequently, our age data constrain that the Okhotsk Sea Plate and Eurasia Plate collision occurred in the middle Eocene between 49 and 38 Ma. This age range is consistent with late Eocene uncomformity identified in the Sakhalin Island and Okhotsk Sea.

show abstract

“…Sea Region (Structure, 1996), and Rodnikov et al (2001), and a heat flow is constructed from Smirnov (1980), Pollack et al (1991), and Structure (1996). The thickness of the crust along the geotraverse varies from 35-40 km under Sakhalin and the Kuril Islands to 8-10 km under the Kuril Basin (Structure, 1996;Rodnikov et al, 2005;Piip and Rodnikov, 2004). In the Cenozoic, the large part of the sedimentary basins was formed.…”

Section: Figure 3 Geotraverse Of the Okhotsk Sea Region At The Righmentioning

confidence: 99%

Crustal and mantle structure of the Sea of Okhotsk, Pacific Northwest: A review

2014

View full text Add to dashboard Cite

The highest seismic activity is observed along the Kuril Island Arc. Here the Pacific Plate is moving towards and being subducted under the continent, forming a seismic zone traced to a depth of 700 km. The seismicity is a result of the active subduction zone tectonics in the region. In the west, the Okhotsk Sea Plate is bounded by deep faults extending along Sakhalin. The deep faults correspond mostly to the system of right-lateral strike-slip faults and thrusts. There the earthquakes for the major part are localized in the crust (Zlobin, 2005). Shallow-focus earthquakes are connected with rift structures of a Kuril Basin and Tatar Strait Trough (Rodnikov et al., 2005). Okhotsk Sea Geotraverse The Okhotsk Sea Geotraverse crosses Sikhote Alin, Sakhalin, the Kuril Basin, Kuril Island Arc and Pacific (Fig. 3). The crust is constructed according to data from Galperin and Kosminskaya (1964), Zverev and Tulina (1971), Rodkin and Rodnikov (1996), and Piip and Rodnikov (2004), the upper mantle is constructed from Structure and Dynamics of the Lithosphere and Asthenosphere of the Okhotsk The deep structure of the Sea of Okhotsk under seismically dangerous regions is studied. The main feature of the deep structure in the region is the occurrence of an asthenospheric layer in the upper mantle. Asthenospheric diapirs can effectively rise through the crust, causing destruction of the lithosphere, formation of deep basins, faults and rifts accompanied by shallow-focus earthquakes, and eruptions of volcanoes. The vast majority of earthquakes are confined to the Kuril Island Arc, where the Pacific Plate is subducted under the continent. The seismicity in the region is a result of active tectonics in the subduction zone. This zone is traced to a depth of 700 km. In the west, the Okhotsk Sea Region is bounded by the deep faults extending along Sakhalin, where earthquakes are localized in the crust. The ancient subduction zone under Sakhalin is established. In the late Cretaceous to Paleogene the subduction of the Okhotsk Sea Plate under Sakhalin ceased. The reactivation of this ancient subduction zone may currently be in response to the strong earthquakes in Sakhalin.

show abstract

The Sea of Okhotsk crust from deep seismic sounding data

Abstract: Abstract. The crustal structure of the Sea of Okhotsk was investigated by way of reinterpreting the data obtained along 22 deep seismic sounding (DSS) profiles. Eight profiles traversed the Sea of Okhotsk. These seismic surveys were performed during the International

Cited by 22 publications

References 3 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

Timing of Okhotsk Sea Plate Collision With Eurasia Plate: Zircon U‐Pb Age Constraints From the Sakhalin Island, Russian Far East

Crustal and mantle structure of the Sea of Okhotsk, Pacific Northwest: A review

Contact Info

Product

Resources

About