Numerical Modeling of Sedimentary Basin Formation at the Termination of Lateral Faults in a Tectonic Region where Fault Propagation has Occurred

Kusumoto, Shigekazu; Itoh, Yasuto; Takano, Osamu; Tamaki, Machiko

doi:10.5772/56558

Cited by 8 publications

(11 citation statements)

References 68 publications

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“…Based on a detailed sedimentological study, Takano and Waseda (2003) pointed out that the rate of subsidence had accelerated during deposition of the Ishikari Group. A contractional regime may have been coexistent during this stage, as was suggested by Takano et al (2013) and Kusumoto et al (2013). Kawakami et al (2002) found fragments of metamorphic rocks from acidic tuff intercalated in a lower Oligocene unit in the IshikariTeshio Belt.…”

Section: Early Paleogene Settingmentioning

confidence: 68%

“…Dislocation modeling is a superposition Fault names adopted for numerical modeling are after Kusumoto et al (2013) and annotated in the figure. Isopach map of the Kawabata stage is after the Association of Natural Gas Mining and Association for Offshore Petroleum Exploration (1982).…”

Section: Duration Of Strike-slip Motion: Dislocation Modeling Of Basimentioning

confidence: 99%

“…Components of dislocation (km) Fault parameters Nomenclature of fault zones is after Kusumoto et al (2013). Positive strike-slip and dip slip components correspond to right-lateral slip and reverse slip, respectively, with 0 < δ < π/2.…”

Section: Duration Of Strike-slip Motion: Dislocation Modeling Of Basimentioning

confidence: 99%

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Mechanism of long-standing Cenozoic basin formation in central Hokkaido: an integrated basin study on an oblique convergent margin

Itoh

Takano

Kusumoto

et al. 2014

Prog Earth Planet Sci

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The basin-forming process along a convergent margin off the eastern coast of Eurasia was pursued on the basis of geological, geochemical, and geophysical approaches. Central Hokkaido has been a site of vigorous tectonic events throughout the Cenozoic reflecting the long-standing subduction of oceanic plates in the region. Geochemical modeling provided an estimate of the eroded Paleogene unit in the study area. Data on the considerable thickness of the missing unit implied continued subsidence of the forearc region and its subsequent exhumation under the emergence of a compressive regime synchronous with the back-arc opening stage. Spatially large facies variety in the Paleogene system suggests that basin compartmentalization occurred as a result of the trench-parallel component of the plate convergence. Right-lateral motion seems to have been the dominant type in Hokkaido and the forearc of northeast Japan since the Late Cretaceous, except for a left-lateral episode during rapid subsidence of the Izanagi Plate around 110 Ma. Numerical modeling demonstrated that dextral slip on a bunch of longitudinal strike-slip faults restored the Neogenedepocenters in central Hokkaido, together with an east-west compressive regime related to an arc-arc collision.

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Section: Early Paleogene Settingmentioning

confidence: 68%

Section: Duration Of Strike-slip Motion: Dislocation Modeling Of Basimentioning

confidence: 99%

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Mechanism of long-standing Cenozoic basin formation in central Hokkaido: an integrated basin study on an oblique convergent margin

Itoh

Takano

Kusumoto

et al. 2014

Prog Earth Planet Sci

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“…Such a deformation mode spread over the forearc basin of northeast Japan [17] and Hokkaido and lingered through the Paleogene. This was shown by numerical modeling of pull-apart basin formation in Hokkaido [18]. Its timeline is totally discordant from that of southwest Japan.…”

Section: Dominant Sense Of Faulting On Plate Marginsmentioning

confidence: 84%

Tectonic Synthesis: A Plate Reconstruction Model of the NW Pacific Region Since 100 Ma

Itoh¹,

Takano²,

Takashima³

2017

Dynamics of Arc Migration and Amalgamation - Architectural Examples From the NW Pacific Margin

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Based on the results of interdisciplinary study from Chapters 1-4, a plate tectonic model of the northwestern Pacific region since 100 Ma is presented in this chapter. The evolution of the Pacific margin is viewed as a longstanding history of migration/amalgamation of allochthonous blocks onto the subduction zone. Such a process inevitably provoked diverse tectonic events, spatiotemporal positions of which have been discussed in this book. In order to reconcile paradoxical discrepancies in the docking process of arc fragments, the authors introduce a marginal sea plate with a spreading center that was alive in the Cretaceous. Oblique subduction of the ridge caused specific migratory igneous activity along the rim of the overriding plates, together with flips of shearing direction. Arc-trench systems on the eastern and western sides of the marginal sea plate developed following different timelines and were eventually mixed up during the plate's closure that prompted formation of a coincident Oligocene clinounconformity widespread on the Eurasian margin. Since the demise of the hypothetical plate, the tectonic regime of the northwestern Pacific margin has been controlled by the growth, namely, the rotational history and modes of convergence of the Philippine Sea Plate.

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“…Modes of the Philippine Sea Plate convergence are shown schematically by the length and azimuth of the arrows. Tectonics -Problems of Regional Settings [22], as shown in Figure 16. A closer look at the seismic records indicates high-angle faults cutting the sediment surface on the trace of the SJSFZ (see the seismic inset of Figure 16 and the active horst in Figure 5, which is indicated by a bracket).…”

Section: Confined Deformation On the Back-arc Shelf: Emerging Quaternmentioning

confidence: 99%

Post-Opening Deformation History of the Japan Sea Back-Arc Basin: Tectonic Processes on an Active Margin Governed by the Mode of Plate Convergence

Itoh¹

2018

Tectonics - Problems of Regional Settings

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Three-dimensional structure of the Japan Sea back-arc basin is investigated based on an extensive reflection seismic survey. The process of the Oligocene to early Miocene rifting is described in reference to a geologic database, and the most likely paleoreconstruction of rifted continental fragments is presented. The back-arc region has been subjected to intermittent post-opening deformation events, which the author regards as side effects of temporal shifts in the convergence mode of the Philippine Sea Plate (PSP). The southern shelf of the Japan Sea appears to have suffered North-South strong contraction for a short period of time during the latest Miocene. Resumed convergence of the PSP was responsible for the regional tectonic event because frequent igneous intrusions within the upper Miocene series upon the back-arc shelf, which was confirmed by a borehole stratigraphic study, are suggestive of revitalized arc volcanism linked to dehydration of the subducted slab. During the Quaternary period, confined structure in varied forms developed on the shelf, which is related to the dextral wrench deformation of southwest Japan and the eventual arc-parallel crustal breakup along the back-arc region. Simultaneous highly oblique subduction of the PSP provoked the prevailing shear stress and conspicuous neotectonic deformation.

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Numerical Modeling of Sedimentary Basin Formation at the Termination of Lateral Faults in a Tectonic Region where Fault Propagation has Occurred

Cited by 8 publications

References 68 publications

Mechanism of long-standing Cenozoic basin formation in central Hokkaido: an integrated basin study on an oblique convergent margin

Mechanism of long-standing Cenozoic basin formation in central Hokkaido: an integrated basin study on an oblique convergent margin

Tectonic Synthesis: A Plate Reconstruction Model of the NW Pacific Region Since 100 Ma

Post-Opening Deformation History of the Japan Sea Back-Arc Basin: Tectonic Processes on an Active Margin Governed by the Mode of Plate Convergence

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