Widespread submarine tephras around Japan — Petrographic and chemical properties

Furuta, Toshio; Fujioka, Kantaro; Arai, Fusao

doi:10.1016/0025-3227(86)90103-9

Cited by 104 publications

(56 citation statements)

References 13 publications

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“…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). Recently, Kimura et al (2015) determined 10 major and 33 trace elements and Pb isotope ratios for dacitic to rhyolitic glass shards from 80 widespread tephras erupted during the past 5 Ma.…”

Section: Reviewsmentioning

confidence: 99%

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: 99%

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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“…The white coarse volcanic ash layer at Hole 792 A has quite similar mineral assemblages, refractive indices, and chemical compositions as well as ages and glass shard shapes to that of Aso-4 (Furuta et al, 1986) of the Aso Volcano, Kyushu. The type of glass shard in the Aso-4 is bubble wall with a pale brown color.…”

Section: Samples 126-792a-1h-581-83 CM and Aso-4mentioning

confidence: 97%

“…The distribution of Quaternary marine tephras around the Japanese Islands has been well documented by studies of piston core samples taken in the region (Machida andArai, 1983, 1988;Furuta et al, 1986). However, tephras along the Izu-Bonin Arc are not as well studied, except for those of Oshima Island, south of Tokyo (Nakamura, 1964).…”

Section: Introductionmentioning

confidence: 99%

Correlation of Quaternary Tephras throughout the Izu-Bonin Areas

Fujioka¹,

Nishimura²,

Matsuo³

et al. 1992

Proceedings of the Ocean Drilling Program, 126 Scientific Results

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Quaternary marine tephras in the Izu-Bonin Arc offer significant information about explosive volcanic activities of the arc. Visual core descriptions, petrographic examinations, and chemical and grain-size analyses were conducted on tephras of backarc, arc, and forearc origin. Tephras are black and white and occur in simple and multiple modes with mixed and nonmixed ashes of black and white glass shards. The grain size distributions of the tephras are classified into three categories: coarse, white pumiceous, and fine white and black well-sorted types. The frequency of occurrence of the white and black tephras differs within the tectonic settings of the arc. Chemically, the Quaternary tephras in this region belong to low-alkali tholeiitic series with lower K 2 O and TiO 2 than normal ordinary arc volcanic materials. Several tephras from different sites along the forearc correlate with each other and with tephras in the Shikoku Basin site and with Aogashima volcanics. These volcanic ashes resemble those in other backarc rifting areas, such as in the Fiji, Okinawa (Ryukyu), and Mariana regions.

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“…백두산은 고도 2,750 m의 화산으로 신생대 제 3기 마이오세-플라이오세에 현무암 용암대지와 순상화산 체를, 제4기 플라이스토세에 백두산 성층화산체를 형 성하였고 홀로세에 들어 폭발적인 대분화(소원주와 윤성효, 1999)와 함께 천지 칼데라를 형성하였고 역 사시대에도 소·대규모의 분화를 계속하였다 (윤성효 외, 1993; 윤성효와 최종섭, 1996; 윤성효와 이정현, 2012 (Furuta et al, 1986 (Stohl et al, 2005). (Thomson, 1987), 이때 확률 과정 중에 서 어떤 시스템의 현재 상태만 주어지면 과거의 역 Fig.…”

Section: 백두산의 지형과 분화 가능성unclassified

A Case Analysis of Volcanic Ash Dispersion under Various Volcanic Explosivity Index of the Mt. Baegdu

Lee¹,

Jang²,

Lee³

2012

Journal of the Korean earth science society

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In order to clarify the characteristics of dispersion of volcanic tephra emitted from the Mt. Baegdu with various eruption environment, numerical analysis were performed using numerical models, Weather Research and Forecast (WRF) and FLEXPART. Synoptic conditions at 12 October 2010 was adopted because the volcanic ash of Mt. Baegdu can reach the Korean peninsula and its dispersion pattern was compared with different Volcanic Explosivity Index (VEI) and particle size. Predominant size of falling out ash flowing in the peninsular is smaller than 0.5 mm and the ash large than the size is difficult to get in the peninsular due to the its weak ability of truculent diffusion. the difference of ash distribution with various VEI scenarios is not so much but number density of ash in the air is dramatically changed. Volcanic ash tends to be deposited easily in eastern coastal area such as Gangneung and Busan, because of the inflow of ash from East Sea and barrier effect of the Taeback mountains along the east coast of the Korean Peninsula. Accumulated amount of ash deposition can be increased in short period in several urban areas.

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Widespread submarine tephras around Japan — Petrographic and chemical properties

Cited by 104 publications

References 13 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

Correlation of Quaternary Tephras throughout the Izu-Bonin Areas

A Case Analysis of Volcanic Ash Dispersion under Various Volcanic Explosivity Index of the Mt. Baegdu

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