ISHIYAMA Daizo

写真a

Affiliation

Graduate School of International Resource Sciences  Department of Earth Resource Engineering and Environmental Science 

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Research Interests 【 display / non-display 】

  • Geochemistry

  • Economic Geology

  • Environmental Geology

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Graduating School 【 display / non-display 】

  • 　
    -
    1981.03

    Akita University   Faculty of Mining   Graduated

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Graduate School 【 display / non-display 】

  • 　
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    1987.03

    Osaka City University  Graduate School, Division of Natural Science  Doctor's Course  Completed

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Studying abroad experiences 【 display / non-display 】

  • 1992.04
    -
    1994.03

    University of Idaho   Visting Professor

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Campus Career 【 display / non-display 】

  • 2022.04
    -
    Now

    Akita University   Graduate School of International Resource Sciences   Department of Earth Resource Engineering and Environmental Science   Specially-appointed Professor  

  • 2016.04
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    2022.03

    Akita University   Graduate School of International Resource Sciences   Department of Earth Resource Engineering and Environmental Science   Professor  

  • 2014.04
    -
    2016.03

    Akita University   Faculty of International Resource Sciences   Department of International Resource Sciences   Dept. of Earth Resource Engineering and Environmental Science   Professor  

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Academic Society Affiliations 【 display / non-display 】

  • 1982.05
    -
    Now
     

    Japan

     

    Society of Resource Geology

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Research Areas 【 display / non-display 】

  • Natural Science / Solid earth sciences  / Economic Geology, Geochemistry

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Thesis for a degree 【 display / non-display 】

  • Geologic, fluid inclusion, and stable isotope studies of the manganese-lead-zinc- silver deposits in the Jokoku mining area, Hokkaido, Japan

    石山大三 

    鉱山地質  39 ( 6 ) 403 - 416   1987.03

    Single author

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Research Achievements 【 display / non-display 】

    ◆Original paper【 display / non-display 】

  • Fractionation of rare earth elements (REEs) and actinides (U and Th) originating from acid thermal water during artificial and natural neutralization processes of surface waters.

    Ogawa, Y., Ishiyama, D., Shikazono, N., Iwane, K., Hoshino, T., Kajiwara, M., Tsuchiya, N., Saini-Eidukat, B. Wood, S. A.

    Geochim. Cosmochim. Acta   249   247 - 262   2019.06  [Refereed]

    Research paper (journal)   Domestic Co-author

  • Factors Controlling the Fractionation and Seasonal Mobility Variations of Ga and In in Systems Impacted by Acidic Thermal Waters: Effects of Thermodynamics and Bacterial Activity.

    Ogawa, Y., Ishiyama, D., Shikazono, N., Suto, K., Inoue, C., Tsuchiya, N., Saini-Eidukat, Wood, S. A.

    Aquat. Geochem.   24   5 - 25   2018.12  [Refereed]

    Research paper (journal)   Domestic Co-author

  • Mobility and natural attenuation of metals and arsenic in acidic waters of the drainage system of Timok River from Bor copper mines (Serbia) to Danube River.

    Đorđievski, S., Ishiyama, D., Ogawa, Y. and Stevanović, Z.

    Environ. Sci. Pollution Res.   25   25005 - 25019   2018.09  [Refereed]

    Research paper (journal)   Domestic Co-author

  • Origin of Zn-Pb-Sb-Au mineralization adjacent to the Paleoproterozoic Boliden Au-rich VMS deposit, Sweden: Evidence from Petrographic and Oxygen Isotope Characteristics.

    Adomako-Ansah, K., Ishiyama, D. and Allen, R.

    Mineralium Deposita   53   683 - 700   2018.06  [Refereed]

    Research paper (journal)   Domestic Co-author

  • Geology and geochemical characteristics of the Xiajinbao gold deposit in the Hebei Province, China.

    Li, H., Ishiyama, D., Zhang, Y. and Shao, Y.

    J. Mineral. Petrol. Sci.   113   24 - 40   2018.06  [Refereed]

    Research paper (journal)   Domestic Co-author

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    ◆Other【 display / non-display 】

  • Mode of occurrence and origin of the kaolin mineral-rich gravelly sediments at Rendaiji, Yuzawa City, Akita Prefecture, NE Japan

    Kano Kazuhiko, Ishiyama Daizo, Ohba Tsukasa, Fujimoto Yukio, Ohguchi Takeshi

    The Journal of the Geological Society of Japan ( The Geological Society of Japan )  128 ( 1 ) 199 - 214   2022.01

    <p>This paper describes the mode of occurrence of the Rendaiji Gravel Bed that is newly exposed in the quarry of Rendaiji, Yuzawa City, Akita Prefecture. The bed is of unknown attribution, >10 m thick, and comprises 15 or more flow units. Constituent gravels characteristically contain kaolin minerals and lesser amounts of cristobalite and/or smectite, together with iron oxides and hydroxides formed by weathering of iron sulfides. Most of the gravels rich in kaolin minerals are plastically deformed, have lenticular or thin platy morphology, and are accompanied by sparse larger gravels of kaolin mineral-bearing tuffaceous rocks. Individual flow units are poorly sorted and non-stratified with a sharp base. In many cases, they show inverse grading in the basal part and finer-grained laminations in the uppermost part. Associated with minor cristobalite and/or smectite, kaolin minerals commonly replace volcanic glass shards. In addition, crossbedding and flame structures suggest a paleoflow from the southeast. The gravelly deposits are interpreted to have been settled from lahars that were derived from one of the geothermal areas in the Sanzugawa Caldera that have been active since 2 Ma. Lenticular and/or platy, plastically deformed gravels were likely concentrated and emplaced parallel to one another from viscous laminar flows.</p>

    DOI CiNii Research

  • Circulation mechanism of lake water in Lake Tazawa based on characteristics of water quality and wind

    Katamura Arata, Hayashi Takeshi, Ishiyama Daizo, Ogawa Yasumasa, Ishiyama Yoko

    Proceeding of Annual Conference ( THE JAPAN SOCIETY OF HYDROLOGY AND WATER RESOURCES )  34 ( 0 ) 82   2021

    DOI CiNii Research

  • Geochemical characteristics and transport mechanisms of elements of river water in Akita Prefecture

    Ishiyama Daizo, Minh Quyen Pham, Nakano Takanori, Shin Ki―Cheol

    Abstracts of Annual Meeting of the Geochemical Society of Japan ( GEOCHEMICAL SOCIETY OF JAPAN )  68 ( 0 ) 174   2021

    <p>Based on the distribution of concentrations and isotope ratios of elements in river water and variations in the chemical forms of elements in river water, the controlling factors of river water quality and transport mechanisms of elements were clarified for river water in Akita Prefecture. The distribution of concentrations and isotope ratios indicates that river water in Akita Prefecture is formed under the influence of air masses that form precipitation, water/rock reactions when the river water exists as groundwater, and thermal water. The variations in the chemical forms of Fe and Al indicate that Fe and Al in river water exist in dissolved and particulate fractions at pH below 6, and that most of the particulate fraction is precipitated, while Fe exists in particulate and microcolloidal fractions and Al in suspended fraction at pH above 7. In river systems with many stagnant water bodies such as dams, the decrease in the amount of T-Al is large. This indicates that in river systems with stagnant water bodies such as dams, elements that are easily precipitated are precipitated in the stagnant water bodies.</p>

    DOI CiNii Research

  • Sr isotope ratios and diatom ages of the Neogene carbonate concretions in Akita and northern Yamagata areas, Northeast Japan

    Nishikawa Osamu, Ando Daiki, Shimada Chieko, Ishiyama Daizo, Yamamoto Masatsugu

    The Journal of the Geological Society of Japan ( The Geological Society of Japan )  126 ( 2 ) 53 - 69   2020.02

    <p>Strontium isotope ratios and diatom fossil ages were determined for carbonate concretions developed in Neogene sedimentary rocks in the Akita and northern Yamagata areas, northeastern Japan. The diatom biozones of five carbonate concretions were assigned to <i>Denticulopsis dimorpha</i> (North Pacific Diatom biohorizon 5D), <i>Rouxia californica</i> (7A), and lower <i>Neodenticula kamtschatica</i> (7Ba) zones. <sup>87</sup>Sr/<sup>86</sup>Sr isotope ratios of carbonate concretions were distributed between the values of paleo-seawater and those of igneous rocks in the study area, ranging from 0.709013 to 0.706749. The younger the age of a concretion, the smaller the deviation of its <sup>87</sup>Sr/<sup>86</sup>Sr ratio from that of paleo-seawater. This indicates that the carbonate concretions were generated from pore water that had been contaminated by igneous material associated with volcanic activity in the area during the middle to late Miocene.</p><p>Fossil shells occurring with concretions in the Tentokuji and Sasaoka Formations have Sr isotope ratios similar to that of paleo-seawater, leading to a hypothesis that the measured Sr isotope ratios of both fossil shells and concretions are primary and have remained unchanged throughout the burial process. This is supported by a significant difference in Sr isotope ratios between a given concretion and an included molluscan fossil with a preserved aragonite shell. Similarly, carbonate concretions in the horizons lower than the Funakawa Formation may also have inherited relatively low Sr isotope ratios from pore water during the early stages of diagenesis.</p>

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  • Tazawako caldera, NE Japan and its eruption products

    Kano Kazuhiko, Ohguchi Takeshi, Hayashi Shintaro, Yanai Keizo, Ishizuka Osamu, Miyagi Isoji, Ishiyama Daizo

    The Journal of the Geological Society of Japan ( The Geological Society of Japan )  126 ( 5 ) 233 - 249   2020

    <p>It has been inferred that Lake Tazawa (<i>Tazawa-Ko</i> or <i>Tazawako</i> in Japanese) is a caldera lake, but the products of the caldera-forming eruption have yet to be confirmed. Here, we report the discovery of the rhyolitic pyroclastic density current deposits (PDCs) that erupted from Tazawa-Ko between 2 and 1.8 Ma and shall propose to call this confirmed caldera the Tazawako caldera after the name of Tazawako Town (Tazawako-Machi), where Lake Tazawa (Tazawa-Ko) is located. The lower PDCs are wavy to parallel-stratified deposits that are dominated by polyhedral and platy glass shards, suggesting that the caldera-forming eruption began with phreatomagmatic explosions. The upper PDCs are poorly sorted, largely non-stratified deposits that are closely associated with the debris avalanche deposits around Tazawa-Ko, and are welded where they occur in a valley 30 km to the north of Tazawa-Ko, thereby representing the climactic eruption. These caldera-forming eruption products are limited in volume even at proximal locations, presumably due to a long-term erosion. However, the total eruption volume is estimated to be ~1011 m3 with the ~8-km-diameter of the source caldera. This volume is supported by correlative fallout ash observed up to 800 km from Tazawa-Ko. Two lava domes erupted on the caldera floor, and two lava flows were effused on the somma between 1.8 and 1.6 Ma, following caldera formation. While pre-caldera volcanism remains largely unknown, a small volume of andesite lava flow was extruded from a site on the southeastern caldera rim. Finally, we shall propose to call this confirmed caldera the Tazawako caldera after the name of Tazawako Town (Tazawako-Machi), where Lake Tazawa (Tazawa-Ko) is located.</p>

    DOI

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Presentations 【 display / non-display 】

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