The structure and age of acoustic basement in the Okhotsk Sea

Burk, C. A.; Gnibidenko, Helios S.

doi:10.1029/me001p0451

Cited by 11 publications

(4 citation statements)

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“…The "Okhotomorsk" model postulates that the Sredinnyi Range is the exhumed eastern edge of a larger microcontinent that underlies most of the Sea of Okhotsk (see reviews in, Burk and Gnibidenko, 1977;Parfenov and Natal'in, 1977;Gnibidenko and Khvedchuk, 1982;Parfenov, 1984;Jolivet and others, 1988;Zonenshain and others, 1990;Sengor and Natalin, 1996;Nokleberg and others, 1998;Konstantinovskaia, 2000Konstantinovskaia, , 2001Konstantinovskaia, , 2002. The cessation of Andean-style subduction-related magmatism in the Okhotsk-Chukotka Volcanic Belt (fig.…”

mentioning

confidence: 99%

Eocene arc-continent collision and crustal consolidation in Kamchatka, Russian Far East

Hourigan

Brandon

Soloviev

et al. 2009

American Journal of Science

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The age and origin of high-grade metamorphic rocks of the Sredinnyi Range, Kamchatka have been the subject of a long and controversial debate. Based on geochronologic data and its association with a collage of accreted oceanic terranes, leading interpretations argue that the Sredinnyi Range metamorphic rocks represent an accreted Precambrian or Mesozoic microcontinent. In this contribution, we present new data that indicate that these metamorphic rocks were formed from the Cretaceous-Paleocene sedimentary margin of northeast Russia when it was overridden during Eocene obduction of the Olyutorsky arc, a far-travelled oceanic island arc. Our data include new mapping and structural observations along the northern and eastern flanks of the Sredinnyi Range, and SHRIMP zircon and monazite U-Th-Pb age data from 15 key samples. These new isotopic data demonstrate that paragneissic units were formed from sediments with depositional ages locally no older than Late Cretaceous to Paleocene. Furthermore, the statistical similarity of zircon U-Pb grain-ages from the Kamchatka Schist with very low-grade turbidite sandstones of the Ukelayat and Khozgon Groups indicate that metasediments of the Sredinnyi Range are upgraded stratigraphic equivalents of northeast Russian marginal strata. SHRIMP U-Pb ages of zircon overgrowths and metamorphic monazite extracted from migmatite and gneiss indicate that peak metamorphism occurred at 52 Ma, which is synchronous with the onset of the Olyutorsky arc-continent collision. Heating and cooling occurred rapidly, at rates approaching 80°C/m.y. Rapid heating is attributed to syn-collisional, subductionrelated magmatism. Thermochronology and structural observations indicate that exhumation was due to a combination of ductile and brittle thinning of the crust. We speculate that this thinning was caused by diapiric ascent of a low-density low-viscosity continental material beneath a dense structural lid of the obducted island arc.

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confidence: 99%

Eocene arc-continent collision and crustal consolidation in Kamchatka, Russian Far East

Hourigan

Brandon

Soloviev

et al. 2009

American Journal of Science

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“…Some of these samples may be ice‐rafted debris, but most are considered to have been in situ. Geodekyan et al (1977), Burk and Gnibidenko (1977), and Kimura and Tamaki (1985) noted that igneous rocks exposed near the Academy of Sciences Plateau are the same as those intruding and extruding the Nemuro Group along the Konsen coast. It is therefore likely that the expansion of the Kuril backarc basin divided the remnant of the PKA into northern and southern parts that now occur in parallel orientations to the north and south of the basin, respectively (Figure 2), as is the case for the modern Izu–Bonin–Mariana arc and Kyushu–Palau Ridge (remnant arc) on the Philippine Sea Plate (Nishizawa et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Various rock types have been reported in dredge samples collected there. In particular, granite and andesite samples have Late Cretaceous K-Ar ages of 95-75 Ma (Burk & Gnibidenko, 1977). Some of these samples may be ice-rafted debris, but most are considered to have been in situ.…”

Section: Timing Of the Pka Collision With Ne Asia And Subsequent Tect...mentioning

confidence: 99%

Origin and evolution of the Paleo‐Kuril arc inferred from detrital zircon U–Pb chronology in eastern Hokkaido, NE Asia

et al. 2022

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The Nemuro and Saroma Groups and Yusenkyo Formation occur in eastern Hokkaido and are considered to be forearc or intra‐arc basin sediments of the Paleo‐Kuril arc (PKA) deposited during the Late Cretaceous to middle Eocene. To further clarify the origin of the PKA, we examined the U–Pb ages of detrital zircons within these sandstones and acidic tuff beds; based on our results, we drew the following conclusions. (1) The PKA originated from an oceanic island arc on the oceanic Izanagi Plate around 85 Ma, to which the Nikoro Group greenstone complex was accreted between 81–80 Ma; the Lowest Unit of the Saroma Group covered the surface of the Nikoro accretional greenstone complex. (2) The PKA then first collided with NE Asia around the beginning of the deposition of the Hamanaka Formation (~70 Ma) and transitioned to a continental arc adjacent to NE Asia. This collision generated giant slump beds during deposition of the Akkeshi Formation. During deposition of the Kiritappu Formation, the entire Nemuro Peninsula was uplifted, supplying large volumes of clastic sediments. (3) Although we do not have data directly bearing on why the North American Plate was established in the edge of NE Asia, we speculate that it separated from the Eurasian continent around ~70 Ma when NE Asia first collided with the PKA. Subsequently, the PKA has behaved as part of the North American Plate. The Paleo‐Japan arc (or East Sikhote–Alin arc) and the PKA became joined via the Hidaka Belt. Around 40 Ma, during the deposition of coarse conglomerate beds of the Urahoro Group, the PKA was uplifted and bent clockwise due to a second collision with NE Asia. (4) The modern Kuril arc was established around 36 Ma (late Eocene–early Oligocene), and the Kuril backarc basin opened into the present tectonic setting in the late Oligocene–early Miocene.

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“…K was deter mined by flame photometry (Nagao et al, 1984). 40Ar was analyzed by the isotope dilu tion method with 38Ar as a tracer using the Goto Gnibidenko and Ilyev, 1976;Burk and Gnibidenko, 1977;Geodekyan, 1977;Sergeyev and Krasny, 1987). The K-Ar ages of the granitic rocks are from 73 to 209 Ma.…”

Section: K-ar Age Determinationmentioning

confidence: 99%

Finding of 192Ma granitic cobbles from the Cape Shiretoko area, eastern Hokkaido, Japan.

Goto

Gouchi

Itaya

1991

J. Min. Petr. Econ. Geol.

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The structure and age of acoustic basement in the Okhotsk Sea

Cited by 11 publications

References 1 publication

Eocene arc-continent collision and crustal consolidation in Kamchatka, Russian Far East

Eocene arc-continent collision and crustal consolidation in Kamchatka, Russian Far East

Origin and evolution of the Paleo‐Kuril arc inferred from detrital zircon U–Pb chronology in eastern Hokkaido, NE Asia

Finding of 192Ma granitic cobbles from the Cape Shiretoko area, eastern Hokkaido, Japan.

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