Studies on the Transition of the Green Zone in Tokyo

Miyamoto, Katsumi

doi:10.5632/jila1934.57.5_397

Cited by 12 publications

(4 citation statements)

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“…S4). For Kirishima volcano, this interpretation is consistent with whole rock studies showing the existence of two parental magmas generated by different degrees of partial melting of a similar source (Inoue, 1985;Miyamoto, 1997). The SiO2 variations are so restricted that we decided to rely on trace elements for the choice of the most primitive compositions.…”

Section: Major and Trace Element Composition Of The Primitive Magmasupporting

confidence: 82%

Sulfur Isotope and Trace Element Systematics in Arc Magmas: Seeing through the Degassing via a Melt Inclusion Study of Kyushu Island Volcanoes, Japan

Kawaguchi

Koga

Rose-Koga

et al. 2022

Journal of Petrology

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Sulfur is a minor element in magmas but one of the major volatile elements released in volcanic systems, from the magma to the fluid phase upon ascent. Not only are sulfur gases potentially toxic for humans and plants, they are also involved in causing drastic climate changes after major volcanic eruptions. Therefore, studies are carried out by the geoscience community to assess the magmatic sulfur flux by looking at the sulfur content and isotopes in erupted products, with the ultimate aim of improving understanding of the sulfur cycle in subduction zones. Kyushu island in Japan hosts 25 volcanoes among which 11 are active and represent a natural hazard for the local population. It is perhaps the most suitable site for the study of the sulfur cycle for its availability of recent volcanic deposits and its many, highly monitored volcanoes. We investigated sulfur and sulfur isotope compositions of the magma source of Kyushu Island arc using olivine-hosted melt inclusions in mafic tephras and lavas, from 8 volcanoes (9 Holocene samples) going from Northern Kyushu with Oninomi, Yufu, Kuju, and Aso, to Southern Kyushu volcanoes such as Kirishima-Ohachidake, Kirishima-Shinmoedake, Sumiyoshi-ike, and Kaimondake, and one back arc volcano, Fukue-Onidake. We measured major, trace and volatile elements and S isotopes (δ34S) in melt inclusions. Magma composition recorded in the inclusions ranges from basalt to andesite (SiO2 ranging from 40.3 to 60.7 wt. %). For each edifice, we identified the least degassed and least differentiated compositions based on volatile and trace element systematics, and selected the melt inclusions closest to their primitive melts. Comparing these primitive magmas, Sr/Y underlines a compositional dichotomy between volcanoes from northern (Sr/Y>20) and southern Kyushu (Sr/Y<20), separated by a non-volcanic area corresponding to the subduction of the Kyushu-Palau ridge. The δ34S in melt inclusions range from -0.32±0.79 ‰ to +9.43±0.47 ‰ (2σ) and trace the source of the magma from the different volcanoes, rather than degassing or crustal fractionation processes. δ34S is not fractionated by the nature of the fluid (aqueous or melt) metasomatizing the mantle wedge, therefore it is not the first order factor controlling the sulfur isotope variations. Instead, this study illustrates the need for a heavy δ34S component, likely sulfate from seawater, contained in the agent that metasomatized the mantle beneath the arc. If such an observation is confirmed in other subduction zones, sulfur isotopes in melt inclusions may be an effective way to trace seawater input into the mantle beneath arcs.

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Section: Major and Trace Element Composition Of The Primitive Magmasupporting

confidence: 82%

Sulfur Isotope and Trace Element Systematics in Arc Magmas: Seeing through the Degassing via a Melt Inclusion Study of Kyushu Island Volcanoes, Japan

Kawaguchi

Koga

Rose-Koga

et al. 2022

Journal of Petrology

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“…Though the regulations relating to the Tokyo green belt were not actually repealed until the 1968 City Planning Law was passed, in practice the preserved areas had been extensively, if illicitly, built upon well before this time. Miyamoto (1994) details the subsequent attempt to deal with the inadequacies of the previous green belt and implement a law to plan for development in a 160 km circumference around Tokyo. In this iteration, the government established a 'Special committee on parks and green spaces' in March 1956 with Issei Iinuma as chief planner.…”

Section: Tokyo's Agricultural Green Belt 1927-1965mentioning

confidence: 99%

Institutional Setting, Politics and Planning: Private Property, Public Interest and Land Reform in Japan

Parker

Amati

2009

International Planning Studies

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“…Miyamoto 37 compared the way patients with mental disorders state their delusions because delusions eventually manifest in their locutions. He observed patients with mood disorders and found that their delusions of belittlement were circular repetitions of an identical set of thoughts about themselves.…”

Section: Studies On Syndromes Presenting With Delusionsmentioning

confidence: 99%

“…Japanese psychiatrists observed that some adolescent and young adult patients with social phobia were delusionally convinced that their personal traits such as gaze, physiognomy, or body odor made other people feel unpleasant; their symptoms were severer than those in social anxiety disorder without delusions, whereas they did not have passivity experiences typical of schizophrenia. [37][38][39][40][41][42] Pauleikhoff 43 presented cases of delusional disorder whose onset was in their 30s. The contents of their delusions and hallucinations were that they were a nuisance to the community.…”

Section: Studies On Syndromes Presenting With Delusionsmentioning

confidence: 99%

On the concept of delusions: Global trends and psychopathology in Japan

Kumazaki

2023

PCN Reports

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The present article spotlights challenging conceptual and epistemological issues regarding delusions. A research history of various approaches to delusions in Europe, the United States, and Japan reveals the difficulty of defining delusions. Facing these difficulties, the standard concept of delusions has become thinner than the traditional ones, making its boundary with minority opinions vaguer. Nevertheless, clinical typology and epistemological approaches are contributing to the continuous conceptual refinement of delusions. Both standpoints validate and promote each other in elaborating the characteristics of delusions and their boundaries with non‐delusions. In addition, epistemological inquiries into delusions shed new light on the extraordinarily difficult problems in the relationship among belief, knowledge, certainty, and delusions, contributing to epistemology in general. These approaches to delusions promote the evolution of the concept of delusions and related epistemological inquiries.

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Studies on the Transition of the Green Zone in Tokyo

Cited by 12 publications

References 0 publications

Sulfur Isotope and Trace Element Systematics in Arc Magmas: Seeing through the Degassing via a Melt Inclusion Study of Kyushu Island Volcanoes, Japan

Sulfur Isotope and Trace Element Systematics in Arc Magmas: Seeing through the Degassing via a Melt Inclusion Study of Kyushu Island Volcanoes, Japan

Institutional Setting, Politics and Planning: Private Property, Public Interest and Land Reform in Japan

On the concept of delusions: Global trends and psychopathology in Japan

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