Search Results 1-20 of 500

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Chemical mass balance equations for open-system magma chamber processes under equilibrium crystallization conditions

西村光史

東洋大学紀要. 自然科学篇 = Journal of Toyo University. 東洋大学自然科学研究室編 (64), 33-51, 2020-03

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The Time Frame of Plutonic Rocks' "Slow" Cooling and Solidification:—A Comparative Study of Elementary School Teachers' and Lower Secondary School Science Teachers' Subject Area Knowledge— [in Japanese]

HIRATA Toyosei , TAGA Masaru , YOSHIKAWA Takenori , OGAWA Hiroshi

… The purpose of the study was to analyze the results of the survey among science teachers on how long it takes for plutonic rocks to cool and solidify, to compare their answers, and to examine their knowledge of the process. …

Journal of Research in Science Education 61(2), 383-389, 2020

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3

The Ainu People's Recognition of the Eruption Process of Mt. Usu in Hokkaido, Northern Japan: Superstition and Scientific Thinking [in Japanese]

ENDO Masatoshi

… In spite of their superstitious beliefs, the Ainu people actually had scientifically accurate ideas on the process of a volcanic eruption, the origins of material ejected from a crater, and the process of lava dome formation. … The Ainu people's deductions on the process of a volcanic eruption were similar to the latest theories on magma eruptions in volcanology. …

Journal of Geography (Chigaku Zasshi) 129(5), 611-634, 2020

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4

Bread and Pumice [in Japanese]

TORAMARU Atsushi , OGAWA Hiroe , OHASHI Masatoshi , MASUYAMA Takayuki

… Explosive volcanic eruptions produce pumice including bubbles (mainly H2O gas) which form by the vesiculation process under decompression during the magma ascent in the volcanic conduit. … We conduct the bread baking experiments to examine what controls the shape of bubbles by using the vesiculation process due to the fermentation of yeast. …

JAPANESE JOURNAL OF MULTIPHASE FLOW 34(3), 403-410, 2020

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Assimilation and fractional crystallization of Sanukitic high–Mg andesite–derived magmas, Kyushu Island, southwest Japan: An example of the Cretaceous Shaku–dake diorite body

ESHIMA Keisuke , OWADA Masaaki , KAMEI Atsushi

… Some of these mafic bodies show high–Mg diorite (HMD) compositions derived from a high–Mg andesite (HMA) magma. … The Group–1 is influenced by the assimilation and fractional crystallization process during the ascent and emplacement of magma, whereas the Group–2 changes its whole–rock compositions via fractional crystallization. …

Journal of Mineralogical and Petrological Sciences 115(4), 332-347, 2020

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6

Advances in gravity analyses for studying volcanoes and earthquakes

OKUBO Shuhei

… On the other hand, temporal gravity changes provide invaluable information about the process of earthquake faulting, volcanic eruptions, caldera formation, etc. …

Proceedings of the Japan Academy, Series B 96(2), 50-69, 2020

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7

Estimation of the Structure of the Philippine Sea Slab and its Surrounding Area Beneath Southern Kyushu by Seismological Methods [in Japanese]

澁谷拓郎 , 寺石眞弘 , 小松信太郎 , 山﨑健一 , 山下裕亮 , 大倉敬宏 , 吉川慎 , 井口正人 , 為栗健 , 園田忠臣

… In order to contribute to the study of the generation process of the Hyuga Nada earthquakes and the magma supply process to volcanoes such as Sakurajima and Kirishima, we conducted linear array observations, receiver function analyses and seismic tomography, and estimated the seismic structure of the Philippine Sea slab beneath southern Kyushu. …

京都大学防災研究所年報. B = Disaster Prevention Research Institute Annuals. B 62(B), 279-287, 2019-09

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8

Investigation for the magma genesis and generation process of Yufu-dake, Kyushu, Japan, inferred from major and trace element composition of the amphiboles in Yufu-dake lavas [in Japanese]

Okada Ikuo , Shibata Tomoyuki , Yoshikawa Masako , Sugimoto Takeshi , Hayasaka Yasutaka



Annual Meeting of the Geological Society of Japan 2019(0), 375, 2019

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9

Autonomous Engineering - innovative methodology on how to improve routine work process with casting simulation

Chang Dae-Jung

Journal of the Reports of the Japan Foundry Engineering Society Meeting 174(0), 31-31, 2019

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10

Fluxes and mechanisms of magmatic volatile releases: Comparison of volcanic gas and hydrothermal fluid [in Japanese]

Shinohara Hiroshi

… These volatile fluxes from the crust can tell us about flux volatiles in magmas as well as magma itself, and supply/discharge processes. … We would like to discuss the volatile fluxes through volcanic gas, hot spring and groundwater discharges with their contrasting composition to deduce the variation of volatile differentiation process and their budget in the crust. …

Abstracts of Annual Meeting of the Geochemical Society of Japan 66(0), 119, 2019

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11

The Prebiotic Chemical Reaction Process and the Emergence of the First Proto-life through Water–Rock Interactions [in Japanese]

… This process is probably significant in supplying mineral-derived nutrients for proto-life. … These rocks included anhydrous reducing minerals, such as schreibersite (Fe3P) crystallized from the magma ocean. … Through this process, the first proto-life emerged with the creation of three different types of bio-film-like community on each rock surface (Refer to Yoshiya et al., 2019).(Shigenori MARUYAMA) …

Journal of Geography (Chigaku Zasshi) 128(4), Cover04_01-Cover04_02, 2019

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12

Characteristics of hydrothermally altered minerals in volcanic products at Tokachidake volcano, central Hokkaido, Japan [in Japanese]

Imura Takumi , Ohba Tsukasa , Nakagawa Mitsuhiro

… Volcanic products from Tokachidake volcano were observed mineralogically and petrographically, focusing on hydrothermal alteration of ash particles to interpret the pre-eruptive interaction between magma and the subvolcanic hydrothermal fluid. … It shows the reaction process proceeding during discharging the reactant fluid from the inside of the rock. …

The Journal of the Geological Society of Japan 125(3), 203-218, 2019

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13

Magma processes and genesis of the Cretaceous Kawara granodiorite Ushikiri-yama body (Ushikiri-yama granodiorite), North Kyushu, SW Japan [in Japanese]

Eshima Keisuke , Owada Masaaki , Imaoka Teruyoshi , Kamei Atsushi

… Higher initial Sr isotope ratios of the South body, relative to the North body, indicate that sedimentary rocks were assimilated in the magma of the South body during its emplacement in the middle/upper crust. … Overall, the results indicate that a variety of igneous processes including magma mixing, fractional crystallization, and assimilation with the host rocks, were responsible for the formation of the Ushikiri-yama granodiorite. …

The Journal of the Geological Society of Japan 125(3), 237-253, 2019

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14

Magma process of Gamano granodiorite in Ryoke belt, Yanai region, Yamaguchi, Southwest Japan [in Japanese]

Ikeda Yuki , Owada Masaaki , Nishizuka Dai , Kamei Atsushi

… Magma processes associated with plutonic rocks are known to involve fractional crystallization, assimilation with crustal materials, and magma mixing and/or mingling with coeval intrusive rocks. … The garnet granodiorite contains zoned garnet crystals, characterized by an almandine-rich core, possibly derived from pelitic gneiss xenocrysts, and a spessartine-rich rim, which was crystallized from the granitic magma. …

The Journal of the Geological Society of Japan 125(2), 167-182, 2019

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15

Magma Vesiculation and Gas Transport as a Controlling Process of Volcanic Eruption [in Japanese]

吉村俊平

可視化情報学会誌 = Journal of the Visualization Society of Japan 38(149), 図巻頭1p,60-64, 2018-04
16

Magma generation process of the Quaternary Yufu Volcano, Northeast Kyushu, Japan : Approach from patrological features of amphibole [in Japanese]

岡田郁夫 , 柴田知之 , 石橋秀巳 , 杉本健 , 芳川雅子 , 竹村恵二

号外地球 = Chikyu monthly/special : カラー版 (69), 160-166, 2018
17

Magma process of the plutonic complex in Sanyo zone, Yamaguchi Prefecture, SW Japan. [in Japanese]

Kodama Shogo , Owada Masaaki , Imaoka Teruyoshi , Kamei Atsushi

… Considering Sr-Nd isotopic compositions, they are derived from the same parental magma and belong to the transitional zone. …

Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2018(0), 148, 2018

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18

Pre-eruptive processes of Goshikidake pyroclastic rocks in Zao volcano, NE Japan [in Japanese]

Sato Motohiro , Ban Masao

… We performed petrologic examination on pre-eruptive process of upper most unit of Goshikidake pyroclastic rocks of Zao volcano. … Meanwhile, the time scale magma scent from shallow chamber to the surface, based on the decompression rate meter using microlite density and composition was estimated to several days. …

Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2018(0), 149, 2018

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19

Magma mixing process of the Kusatsu Shirane volcano, recorded in the symplectites [in Japanese]

Ueki Kenta , Inui Mutsuko , Okamoto Naoya , Matsunaga Kenta

… We discuss the process during the evolution of the andesite magma of the Kusatsu Shirane volcano, central Japan, based on the symplectite in the Sessho-lava.We found that the symplectites record several stages of the reaction during the magma mixing. … The result indicates that the injections of basaltic magma to the magma chamber beneath the Kusatsu Shirane were repeatedly events. …

Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2018(0), 2, 2018

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20

Magma Vesiculation and Gas Transport as a Controlling Process of Volcanic Eruption [in Japanese]

YOSHIMURA Shumpei

… As a water-rich magma ascends upwards, it vesiculates into bubbly foam as a result of solubility decrease due to decompression. … Further ascent results in magma fragmentation into a mixture of high-temperature gas and pyroclasts. … On the other hand, the same water-rich magma often erupts non-explosively, producing bubble-less lava. … In this paper we review previous researches on the gas transport in the magma. …

Journal of the Visualization Society of Japan 38(149), 16-20, 2018

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