An intraoceanic juvenile arc of shoshonite and adakitic andesite in the Nemuro Belt, the Lesser Kuril Arc, across the K/Pg boundary

Yutani, Taku; Hirano, Naoto; Sumino, Hirochika; Machida, Shiki; Sekimoto, Shun; Yoneda, Shigekazu; Kato, Yasuhiro

doi:10.1016/j.cretres.2023.105510

Cited by 5 publications

(4 citation statements)

References 53 publications

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“…Thus, a sufficient number of grains was needed to interpret the sediment source. Yutani et al 8 also argued that the Nokkamappu Formation of the Nemuro Group in the Paleo-Kuril Arc was deposited in an intraoceanic juvenile arc according to the geochemistry of the igneous rocks of the group. Unfortunately, no zircon grains were recovered from the samples of the Nokkamappu Formation in this study.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, another geochronological study suggested that the Paleo-Kuril Arc could have developed as an immature oceanic island arc system in the Late Cretaceous 7 because it did not detect detrital zircon grains before 85 Ma in the basal successions of the Tokoro Belt, which is part of the Paleo-Kuril Arc system 7 . The geochemical analysis of the igneous rocks in the Nemuro Belt also suggested that the Paleo-Kuril Arc may have developed as an immature magmatic arc system 8 . Thus, the discussion on the origin of the arc has yet to be settled.…”

Section: Introductionmentioning

confidence: 99%

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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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…Thus, a su cient number of grains was needed to interpret the sediment source. Yutani et al 9 also argued that the Nokkamappu Formation of the Nemuro Group in the PKA was deposited in an intraoceanic juvenile arc according to the geochemistry of the igneous rocks of the group. Unfortunately, no zircon grains were recovered from the samples of the Nokkamappu Formation in this study.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, another geochronological study suggested that the PKA could have developed as an immature oceanic island arc system in the Late Cretaceous 8 because it did not detect detrital zircon (DZ) grains before 85 Ma in the basal successions of the Tokoro Belt, which is part of the PKA system. The geochemical analysis of the igneous rocks in the Nemuro Belt also suggested that the PKA may have developed as an immature magmatic arc system 9 . Thus, the discussion on the origin of the arc has yet to be settled.…”

Section: Introductionmentioning

confidence: 99%

Cretaceous to Early Paleogene Evolutionary Records of the Paleo-Kuril Arc: Sediment Provenance Transition from Continental to Magmatic Arc Systems

Harisma,

Sota,

Hirata

et al. 2023

Preprint

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Unraveling the Paleo-Kuril Arc's (PKA) origins is key to understanding northwest Pacific tectonics. The PKA is viewed as an intraoceanic arc from trench subduction between the Izanagi and Pacific Plates. Alternatively, several studies suggest the PKA as a continental magmatic arc, hypothesizing the existence of a mid-oceanic ridge and Paleogene subduction, placing the PKA near the Okhotsk Block's southern edge. This study clarifies these hypotheses, previously clouded by limited geochronological data on deposits in the PKA. We conducted U-Pb dating to examine the origins of detrital zircons from the Cretaceous-Paleogene Tokoro and Nemuro Belts of the PKA. Cluster analysis, merging new and existing data, identified two unique detrital zircon age clusters. The abundance of Precambrian zircons in Cretaceous-Paleocene PKA 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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The Geodynamic Evolution of Intraoceanic Island‒Arc Systems: Expansive (Izu–Bonin‒Mariana), Accretionary (Nemur‒Olutor) and Stationary (Aleutian) Types

Chekhovich,

Sukhov

2023

Geotecton.

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An intraoceanic juvenile arc of shoshonite and adakitic andesite in the Nemuro Belt, the Lesser Kuril Arc, across the K/Pg boundary

Cited by 5 publications

References 53 publications

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

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

Cretaceous to Early Paleogene Evolutionary Records of the Paleo-Kuril Arc: Sediment Provenance Transition from Continental to Magmatic Arc Systems

The Geodynamic Evolution of Intraoceanic Island‒Arc Systems: Expansive (Izu–Bonin‒Mariana), Accretionary (Nemur‒Olutor) and Stationary (Aleutian) Types

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