Solid rocks of the floor of the central part of the Sea of Okhotsk

Geodekyan, A. A.; Удинцев, Г. Б.; Baranov, Boris; Beresnev, A. F.; Burk, C. A.; Богатиков, О. А.; Gabov, V. V.; Gnibidenko, G.S.; Dmitriyev, Yu. I.; Zonenshayn, L. P.; Kurentsova, N. A.; Raznitsin, Yu. N.; Rudnik, G. B.; Sushchevskaya, N. M.

doi:10.1080/00206817709471081

Cited by 4 publications

(4 citation statements)

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“…The most probable sediment source of the Paleo-Kuril Arc is the Okhotsk Block's continental crust that lies beneath the Sea of the Okhotsk, or the Siberian Craton behind it. Samples obtained by dredging in the central region of the Sea of Okhotsk indicate that the Okhotsk Block contains many Cretaceous igneous rocks of magmatic arc origin 39 . Its basement has been considered as a continental crust 40 – 42 or a complex accretionary structure of the Eurasian Plate after the oceanic crust stopped subducting.…”

Section: Discussionmentioning

confidence: 99%

Cretaceous to early Paleogene sediment provenance transition from continental to magmatic arc systems in the Northwestern Pacific Region

Harisma,

Niki,

Hirata

et al. 2024

Sci Rep

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Unraveling the Paleo-Kuril Arc's origins is key to understanding northwest Pacific tectonics. The Paleo-Kuril Arc is viewed as an intraoceanic arc from trench subduction between the Izanagi and Pacific Plates. Alternatively, several studies suggest the Paleo-Kuril Arc as a continental magmatic arc, hypothesizing the existence of a mid-oceanic ridge and Paleogene subduction, placing the Paleo-Kuril Arc near the Okhotsk Block's southern edge. This study clarifies these hypotheses, previously clouded by limited geochronological data on deposits in the Paleo-Kuril Arc. We conducted U–Pb dating to examine the origins of detrital zircons from the Cretaceous–Paleogene Tokoro and Nemuro Belts of the Paleo-Kuril Arc. Cluster analysis, merging new and existing data, identified two unique detrital zircon age clusters. The abundance of Precambrian zircons in Cretaceous–Paleocene Paleo-Kuril Arc sandstones (Type 1 Cluster) suggests a continental magmatic origin, supporting the ridge subduction model. However, an early Eocene shift to a consistent local volcanic source (Type 2 Cluster) highlights a significant provenance change. This geochronological evidence, indicating a separation from continental sources, calls for further research to decode the simultaneous development of sediment sources in different geological belts, potentially tied to the ridge subduction event.

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Section: Discussionmentioning

confidence: 99%

Cretaceous to early Paleogene sediment provenance transition from continental to magmatic arc systems in the Northwestern Pacific Region

Harisma,

Niki,

Hirata

et al. 2024

Sci Rep

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“…G.S. Gnibidenko previously identified it as the Pogranichnyy Ridge (2). New findings indicate that the Pogranichnyy Ridge consolidates different uplifts.…”

mentioning

confidence: 88%

Geological structure of the northwestern part of the Sea of Okhotsk

Margulis¹

1980

International Geology Review

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“…The historical-geological data demonstrate that a region of supply, which was the source of the clastic material in the Sakhalin-Hokkaido thalassogeosyncline, lay on the site of the central part of the present Sea of Okhotsk through the whole of Paleozoic and most of Mesozoic time (4,55). At least two troughs, genetically equivalent to this thalassogeosyncline, must be assumed present in the southeastern and eastern margins of the Sea of Okhotsk shelf, as indicated by dredging information (9).…”

Section: International Geology Reviewmentioning

confidence: 99%