Lower Cretaceous radiolarian bedded chert from the Mineoka Belt, Boso Peninsula, Japan

Ogawa, Yujiro; Sashida, Katsuo

doi:10.5575/geosoc.111.624

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…The Eurasian plate active margin including older accretionary mélange (Mineoka mélange) and forearc basin sediments (Shimanto Group) was covered by heterogeneous clastic sediments (Sakuma Group) during the mid-Miocene (c. 15 Ma), as indicated by the presence of the large foraminifer, Lepidocyclina sp. (Mori and Ogawa 2005;Ogawa and Sashida 2005;Ogawa et al 2008). Basic tuffaceous rocks that are interpreted to have been derived from the Izu-Bonin arc first appear in the Honshu forearc basin in the Boso Peninsula (Amatsu Formation) during the early late Miocene (13-12 Ma) Saito 1997, 1999).…”

Section: Constraints From the Geology Of Honshumentioning

confidence: 99%

Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352)

Robertson

Kutterolf

Avery

et al. 2017

International Geology Review

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New biostratigraphical, geochemical, and magnetic evidence is synthesized with IODP Expedition 352 shipboard results to understand the sedimentary and tectono-magmatic development of the Izu-Bonin outer forearc region. The oceanic basement of the Izu-Bonin forearc was created by supra-subduction zone seafloor spreading during early Eocene (c. 50-51 Ma). Seafloor spreading created an irregular seafloor topography on which talus locally accumulated. Oxide-rich sediments accumulated above the igneous basement by mixing of hydrothermal and pelagic sediment. Basaltic volcanism was followed by a hiatus of up to 15 million years as a result of topographic isolation or sediment bypassing. Variably tuffaceous deep-sea sediments were deposited during Oligocene to early Miocene and from mid-Miocene to Pleistocene. The sediments ponded into extensional fault-controlled basins, whereas condensed sediments accumulated on a local basement high. Oligocene nannofossil ooze accumulated together with felsic tuff that was mainly derived from the nearby Izu-Bonin arc. Accumulation of radiolarian-bearing mud, silty clay, and hydrogenous metal oxides beneath the carbonate compensation depth (CCD) characterized the early Miocene, followed by middle Miocene-Pleistocene increased carbonate preservation, deepened CCD and tephra input from both the oceanic Izu-Bonin arc and the continental margin Honshu arc. The Izu-Bonin forearc basement formed in a near-equatorial setting, with late Mesozoic arc remnants to the west. Subduction-initiation magmatism is likely to have taken place near a pre-existing continent-oceanic crust boundary. The Izu-Bonin arc migrated northward and clockwise to collide with Honshu by early Miocene, strongly influencing regional sedimentation. ARTICLE HISTORY

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Section: Constraints From the Geology Of Honshumentioning

confidence: 99%

Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352)

Robertson

Kutterolf

Avery

et al. 2017

International Geology Review

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“…The fragments of oceanic crustal rock consist of pillow basalts, sheeted dolerite dikes, plutonic rocks, with minor pelagic to hemipelagic sedimentary rocks. Pelagic and hemipelagic sedimentary rocks show biostratigraphic ages are ranging from Late Albian radiolarian fossils in the Yo‐oka Beach of Kamogawa Harbor (Ogawa & Sashida, 2005), and from Paleocene to Miocene elsewhere (Mohiuddin & Ogawa, 1998; Takahashi, 1994).…”

Section: Geological Settingmentioning

confidence: 99%

Cretaceous to Miocene NW Pacific Plate Kinematic Constraints: Paleomagnetism and Ar–Ar Geochronology in the Mineoka Ophiolite Mélange (Japan)

et al. 2021

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East Asia has witnessed the birth and demise of oceanic plates at least, during the latest 500 million years. Subduction of numerous oceanic plates: Eurasian (Amur), Pacific, North America (Okhotsk), Indo-Australia, Caroline, and Philippine Sea plates formed a complex collage of ophiolites, volcanic arcs, orogenic belts, and continental fragments (i.e., terranes, blocks, and massifs) over East Asia (e.g.

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“…Suzuki et al (1984) reported Late Eocene to Early Oligocene foramin-ifera fossils from the same formation. On the other hand, Ogawa and Sashida (2005) reported Middle Cretaceous radiolarian fossils from bedded chert from the Yoka Beach in Kamogawa City. The Hota Group is composed of coarse-grained volcaniclastic sandstone and tuffaceous mudstone to sandstone.…”

Section: Geological and Geochronological Overviewmentioning

confidence: 99%

Early Miocene island arc tholeiite in the Mineoka Belt: Implications for genetic relationship with the Izu–Bonin–Mariana (IBM) arc

Enomoto

Ichiyama

Ito

2018

Journal of Mineralogical and Petrological Sciences

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The Mineoka Belt in central Japan is a Paleogene accretionary complex with the various kinds of volcanic rocks and plutonic rocks formed in multiple ages. A basaltic lapilli tuff derived from the Hota Group was collected from the Mineoka Belt, Boso Peninsula to reveal the genetic relationship of the Mineoka Belt with the Izu-Bonin-Mariana (IBM) arc. The whole-rock composition of the basaltic lapilli tuff shows island arc tholeiite affinity, and the zircon U-Pb dating yields about 18 Ma. The geochemical signatures of the basaltic lapilli tuff are similar to those of the Eocene plutonic rocks in the Mineoka Belt, but the zircon U-Pb age is much younger than those of the plutonic rocks. The idea that the arc-related rocks in the Belt are fragments of the IBM arc can explain the two different ages of the Mineoka arc-related rocks. The island arc plutonic rocks are derived from IBM middle to lower crust formed during Eocene to Oligocene, whereas the Early Miocene basaltic rock is most likely to be a fragment of arc products formed in the IBM volcanism at the end of the Miocene back-arc spreadings.

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Lower Cretaceous radiolarian bedded chert from the Mineoka Belt, Boso Peninsula, Japan

Abstract: The Mineoka Belt is a complex fault zone composed of ophiolitic rocks and pelagic, hemipelagic and terrigenous sedimentary rocks, running from east-west in the south

Cited by 6 publications

References 15 publications

Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352)

Depositional setting, provenance, and tectonic-volcanic setting of Eocene–Recent deep-sea sediments of the oceanic Izu–Bonin forearc, northwest Pacific (IODP Expedition 352)

Cretaceous to Miocene NW Pacific Plate Kinematic Constraints: Paleomagnetism and Ar–Ar Geochronology in the Mineoka Ophiolite Mélange (Japan)

Early Miocene island arc tholeiite in the Mineoka Belt: Implications for genetic relationship with the Izu–Bonin–Mariana (IBM) arc

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