Data report: modal sand composition at Sites C0004, C0006, C0007, and C0008, IODP Expedition 316, Nankai accretionary prism

Milliken, Kitty L.; Comer, Emily E.; Marsaglia, Kathie

doi:10.2204/iodp.proc.314315316.221.2012

Cited by 5 publications

(2 citation statements)

References 14 publications

(11 reference statements)

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“…Its Late Miocene‐to‐Recent stratigraphic and sedimentary history is well characterized by the aforementioned data, including the 3‐D seismic volume wherein major unconformities and facies changes mark phases of basin development. These stratigraphic patterns evolved within a larger system of margin‐to‐trench sedimentation that has distinct transport pathways and provenance signals [ Usman et al ., ; Milliken et al ., ; Fergusson , ; Underwood and Fergusson , ; De Rosa et al ., ]. Moreover, the structure and evolution of the underlying accretionary prism are well established, with a basal décollement [ Park et al ., ], a “megasplay” fault which cuts the frontal region of the forearc basin [ Kimura et al ., ; Strasser et al ., ; Moore et al ., ], and a system of prism‐ and lower forearc basin‐cutting thrusts [ Hayman et al ., ; Boston et al ., ].…”

Section: Introductionmentioning

confidence: 99%

Early sedimentation and deformation in the Kumano forearc basin linked with Nankai accretionary prism evolution, southwest Japan

Ramirez

Gulick

Hayman

2015

Geochem Geophys Geosyst

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Early forearc basin sedimentation and subsidence appear to be linked with convergent margin evolution, yet they do not follow predictable spatiotemporal patterns. In the Kumano basin of southwest Japan, 3-D seismic mapping of major unconformities, combined with biostratigraphic age constraints from two Integrated Ocean Drilling Program (IODP) drill sites illustrates the development of several tectonostratigraphic packages during early evolution and initial creation of accommodation space in the forearc basin. Between 3.8 Ma and 2.06 Ma, a series of slope basins developed between thrust-anticlines oriented along a plate convergence-perpendicular axis. A thin and sheet-like interval, likely slope-cover, unconformably overlies the slope basin sediments. Deposition of this interval at IODP Site C0009 lasted from 2.06 Ma until between 1.24 Ma and 1.34 Ma and was partly coeval with the early upper Kumano basin sedimentary packages. Landward, postdating the slope-cover sediments, a third sedimentary package was deposited before 0.9 Ma. This section correlates with an interval rich in terrigenous material (e.g., woody debris), indicating a possible distinct source or sediment routing system. Our work supports the idea that early forearc basin sediments may be deposited in an actively deforming outer wedge environment and that the outer-to-inner wedge transition of the lower forearc basin is likely a multistage process. The unsteady spatiotemporal nature of inner-outer wedge coupling may lead to erratic stratigraphic patterns, such as have been observed in forearc basins worldwide.

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Section: Introductionmentioning

confidence: 99%

Early sedimentation and deformation in the Kumano forearc basin linked with Nankai accretionary prism evolution, southwest Japan

Ramirez

Gulick

Hayman

2015

Geochem Geophys Geosyst

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“…The area we focus on is the NanTroSEIZE Complex Drilling area, a type locality for accretionary margin research and scientific drilling via the Integrated Ocean Drilling Program and the successor International Ocean Discovery Program (both IODP). These projects, and the previous Ocean Drilling Program (ODP), have produced a suite of samples available for investigating the nature and provenance of forearc sediment using a variety of techniques (Buchs et al., 2015; Jaeger et al., 2019; Marsaglia et al., 1992; Milliken et al, 2012; Ramirez & Milliken, 2016; Taira & Nitsuma, 1986; Underwood & Pickering, 1996, 2018; Usman et al., 2014). In light of these, and additional regional provenance and tectonic studies (Clift et al., 2013; Kimura et al., 2014; Moore et al., 2015; Ramirez et al., 2015; Underwood & Guo, 2018), the Kumano Basin allows a field test of the hypothesized controls on forearc basin initiation and evolution.…”

Section: Introductionmentioning

confidence: 99%

Sediment provenance, routing and tectonic linkages in the Nankai forearc region, Japan

et al. 2021

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Understanding sedimentary routing systems at continental margins can be challenging in tectonically active regions such as forearc basins. Here, we combine sand modal composition and detrital zircon U-Pb data from the Kumano Basin and surrounding Nankai Trough region of Japan to explore sedimentation in an active forearc and its linkages to the regional tectonic history. Our analyses are on Miocene-to-Pleistocene samples collected by the Integrated Ocean Drilling Program (IODP) at inner and outer forearc basin sites C0009 and C0002, river samples from onshore Honshu, and published results from other Nankai IODP sites. Results show the sediments of many IODP samples are similar to that of the modern rivers. Data from C0009 demonstrate that the early accretionary prism already contained slope basins fed by sediments similar to those in the modern Kumano River by 7.1 Ma. The more distal C0002 section was predominantly fed by a system similar to the modern Yodo River, located to the west-southwest. We conclude that the section was therefore tectonically transported, in agreement with the 'mobile model' of oblique tectonic convergence across SW Japan during late Miocene time. Deposition resumed after a ca. 5.6-3.8 Ma hiatus, with sediments primarily fed from the paleo-Kumano River, with some input from the paleo-Tenryu and Kiso/Nagara rivers located to the northeast. Input from the paleo-Tenryu and Kiso/Nagara rivers was likely re-routed towards the trench by ca. 1.3 Ma. Sediments similar to those of the distal Yodo River also make up part of the Kumano basin fill and are best explained by erosion of uplifted older accretionary prism sediments along the Megasplay Fault that bounds the forearc basin. Despite the temporal variability in sedimentation routed to the basin, basin-fill dynamics appear to have been governed primarily by the criticalwedge style dynamics driven by variations in frontal accretion and in-or out-ofsequence thrusting response.

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Mid-Quaternary decoupling of sediment routing in the Nankai Forearc revealed by provenance analysis of turbiditic sands

Usman

Masago

Winkler

et al. 2014

Int J Earth Sci (Geol Rundsch)

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funnelled to this site through the Suruga Canyon. However, sands in the forearc basin show persistent presence of blue sodic amphiboles across the 1 Ma boundary, indicating continuous flux of sediments from the Kumano/Kinokawa River. This implies that the sands in the older turbidites were transported by transverse flow down the slope. The slope basin facies then switched to reflect longitudinal flow around 1 Ma, when the turbiditic sand tapped a volcanic provenance in the Izu-Honshu collision zone, while the sediments transported transversely became confined in the Kumano Basin. Therefore, the change in the depositional systems around 1 Ma is a manifestation of the decoupling of the sediment routing pattern from transverse to long-distance axial flow in response to forearc high uplift along the megasplay fault.

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Data report: modal sand composition at Sites C0004, C0006, C0007, and C0008, IODP Expedition 316, Nankai accretionary prism

Cited by 5 publications

References 14 publications

Early sedimentation and deformation in the Kumano forearc basin linked with Nankai accretionary prism evolution, southwest Japan

Early sedimentation and deformation in the Kumano forearc basin linked with Nankai accretionary prism evolution, southwest Japan

Sediment provenance, routing and tectonic linkages in the Nankai forearc region, Japan

Mid-Quaternary decoupling of sediment routing in the Nankai Forearc revealed by provenance analysis of turbiditic sands

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