Characteristics for the recognition of Pliocene and early Pleistocene marker tephras in central Japan

Tamura, Itoko; Yamazaki, Haruo; Mizuno, Kiyohide

doi:10.1016/j.quaint.2007.04.002

Cited by 36 publications

(39 citation statements)

References 28 publications

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“…The elemental compositions of the major Quaternary tephras with some petrographic characteristics were compiled by Machida and Arai (2003). The following are other studies in the literature describing the major elemental composition of volcanic glass shards of the Quaternary-Neogene tephras: the Holocene to the late Middle Pleistocene: Aoki and Arai (2000), Aoki et al ( , 2008, Nagahashi et al (2004, Aoki and Machida (2006), and Nagahashi and Ishiyama (2009); the Middle Pleistocene to the Pliocene: Nagahashi et al (2000), Tamura et al (2008), Kotaki et al (2011), andSuzuki et al (2011); and the Miocene: Hiranaka et al (2007). Major marine tephra studies around the Japanese islands in locations other than in the Japan Sea include the following: general: Machida and Arai (1983, 1988, 2003 and Furuta et al (1986); NW Pacific: Fujioka (1983), Cambray et al (1990), Aoki and Arai (2000), Aoki et al ( , 2008, Aoki and Machida (2006), Aoki and Ohkushi (2006), Suganuma et al (2006), Aoki (2008), and Ikehara et al (2013); Izu-Bonin: Fujioka et al (1992aFujioka et al ( , 1992b and Nishimura et al (1992); South of Japan: Ikehara et al (2006Ikehara et al ( , 2011 and Kutterolf et al (2014); East China Sea: Cambray et al (1990) and Moriwaki et al (2011).…”

Section: Reviewsmentioning

confidence: 86%

“…Some Middle Pleistocene tephras are preserved in uplifted onshore marine sequences throughout the Japan Sea basin (Shirai et al 1997). Widespread tephras of Plio-Pleistocene age have also been reported in onshore marine and lacustrine sequences in Japan (Nagahashi and Satoguchi 2007;Tamura et al 2008;Satoguchi and Nagahashi 2012). Correlating samples with such tephras is crucial to establishing the robust ages of long marine sequences, such as cores from the International Marine Global Change Study (IMAGES) and ODP/Integrated Ocean Drilling Program (IODP).…”

Section: Tephra As a Chronological Toolmentioning

confidence: 99%

“…For example, alkaline tephras derived from the Ulleung and Baegdosan volcanoes contain alkaline feldspar, while several PlioPleistocene tephras, such as the Znp-Ohta (3.95 Ma) and Omine (or Omine-SK110: 1.65 Ma) tephras (Tamura et al 2008), contain biotite phenocrysts. Both are target minerals for Ar-r and K-Ar dating.…”

Section: Tephra As a Chronological Toolmentioning

confidence: 99%

“…Tamura et al (2008) estimated the volcanic source areas of some Pliocene-Early Pleistocene deposits from the thickness distributions of the tephra beds. However, there are too few onshore outcrops in which each tephra is exposed to determine source areas from onshore data like composition, grain size, and bed thickness.…”

Section: Tephra As a Signal Of Volcanic Evolutionmentioning

confidence: 99%

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Marine tephra in the Japan Sea sediments as a tool for paleoceanography and paleoclimatology

Ikehara

2015

Prog. in Earth and Planet. Sci.

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Tephra is a product of large and explosive volcanic events and can travel thousands of kilometers before deposition. Consequently, tephra deposits are common in terrestrial, lacustrine, marine, and glacial environments. Because tephra deposition is a geologically synchronous event, tephras constitute important isochrones in the Quaternary sequence, not only in Japan but also throughout the northwest Pacific and its marginal seas. As a result, establishing the chronostratigraphic order of tephra deposits is an effective tool for assessing local and regional stratigraphies and for correlating events among sites. For example, tephrostratigraphy can provide precise chronological constraints for other stratigraphic data, such as magneto-and biostratigraphic data. Spatiotemporal variability in the occurrence and geochemistry of tephras can also be used to trace the magmatic evolution of island arcs and their relationships to regional tectonics. In a paleoclimatic context, tephra deposits allow the correlation of past climate events among terrestrial, lacustrine, and marine environments. Tephrochronology is also a fundamental element used in reconstructing the marine reservoir effect, where the ages of tephra in marine and terrestrial settings are compared. Therefore, tephra is a valuable tool not only in stratigraphy, chronology, and volcanology but also in paleoceanography and paleoclimatology.

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Section: Reviewsmentioning

confidence: 86%

Section: Tephra As a Chronological Toolmentioning

confidence: 99%

Section: Tephra As a Chronological Toolmentioning

confidence: 99%

Section: Tephra As a Signal Of Volcanic Evolutionmentioning

confidence: 99%

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Marine tephra in the Japan Sea sediments as a tool for paleoceanography and paleoclimatology

Ikehara

2015

Prog. in Earth and Planet. Sci.

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“…We use the term Znp for the deposits located in the Niigata basin. The Znp and its correlated beds are early Pliocene and estimated age is about 3.95 Ma (Tamura et al 2008). …”

Section: Znp Marine Tephramentioning

confidence: 99%

Characteristics of submarine pumice-rich density current deposits sourced from turbulent mixing of subaerial pyroclastic flows at the shoreline: field and experimental assessment

2011

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This study investigates the types of subaqueous deposits that occur when hot pyroclastic flows turbulently mix with water at the shoreline through field studies of the Znp marine tephra in Japan and flume experiments where hot tephra sample interacted with water. The Znp is a very thick, pumice-rich density current deposit that was sourced from subaerial pyroclastic flows entering the Japan Sea in the Pliocene. Notable characteristics are well-developed grain size and density grading (lithic-rich base, pumice-rich middle, and ash-rich top), preponderance of sedimentary lithic clasts picked up from the seafloor during transport, fine ash depletion in coarse facies, and presence of curviplanar pumice clasts. Flume experiments provide a framework for interpreting the origin and proximity to source of the Znp tephra. On contact of hot tephra sample with water, steam explosions produced a gas-supported pyroclastic density current that advanced over the water while a water-supported density current was produced on the tank floor from the base of a turbulent mixing zone. Experimental deposits comprise proximal lithic breccia, medial pumice breccia, and distal fine ash. Experiments undertaken with cold, water-saturated slurries of tephra sample and water did not produce proximal lithic breccias but a medial basal lithic breccia beneath an upper pumice breccia. Results suggest the characteristics and variations in Znp facies were strongly controlled by turbulent mixing and quenching, proximity to the shoreline, and depositional setting within the basin. Presence of abundant curviplanar pumice clasts in submarine breccias reflects brittle fracture and dismembering that can occur during fragmentation at the vent or during quenching. Subsequent transport in water-supported pumiceous density currents preserves the fragmental textures. Careful study is needed to distinguish the products of subaerial versus subaqueous eruptions.

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Significance of the remarkable unconformity in the Plio–Pleistocene of the Japanese Islands

Tamura

Yamazaki

2010

Quaternary International

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Characteristics for the recognition of Pliocene and early Pleistocene marker tephras in central Japan

Cited by 36 publications

References 28 publications

Marine tephra in the Japan Sea sediments as a tool for paleoceanography and paleoclimatology

Marine tephra in the Japan Sea sediments as a tool for paleoceanography and paleoclimatology

Characteristics of submarine pumice-rich density current deposits sourced from turbulent mixing of subaerial pyroclastic flows at the shoreline: field and experimental assessment

Significance of the remarkable unconformity in the Plio–Pleistocene of the Japanese Islands

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