Faculty Profiles - ASAHARA, Yoshihiro

Presentations -

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2018–2021年名古屋における大気エアロゾル中の硫黄・炭素・微量元素濃度の変動

夏目花, 池盛文数, 久恒邦裕, 片岡賢太郎, 淺原良浩, 南雅代

第26回AMSシンポジウム 2026.3.26 名古屋大学宇宙地球環境研究所超学際ネットワーク形成推進室, 日本AMS研究協会

愛知県天神山遺跡の縄文土器への地球化学分析の適用

土屋隆志, 門脇誠二, 淺原良浩

第26回AMSシンポジウム 2026.3.26 名古屋大学宇宙地球環境研究所超学際ネットワーク形成推進室, 日本AMS研究協会

Geochemical and Sr isotopic insights into the pottery provenance from the Irino Castle ruins in Shikoku Island, Southwest Japan

Daneshvar, N., Minami, M., Asahara, Y., Yamamoto, Y., Kitahara, Y., Yamamoto, T.

The 26th Japanese Symposium on Accelerator Mass Spectrometry (JAMS-26) 2026.3.26

Tracing the origins of Haji pottery (Hajiki) from Irino Runis, Japan: Insights from chemical and Sr isotope analysis

Daneshvar, N., Minami, M., Asahara, Y., Yamamoto, Y., Kitahara, Y., Yamamoto, T.

Workshop on Isotope-Ratio Mass Spectrometry 2025.12.4

Isotopic constraints on the genesis of host rocks at the Chadormou iron deposit, Central Iran International coauthorship

Daneshvar, N., Minami, M., Azizi, H., Asahara, Y.

Workshop on Isotope-Ratio Mass Spectrometry 2025.12.4

炭酸塩コンクーション化剤の地層処分場処分孔への適用性検討

城まゆみ, 長峰春夫, 松本晃治, 吉田英一, 山本鋼志, 淺原良浩

令和7年度日本応用地質学会研究発表会 2025.10.10 一般社団法人日本応用地質学会

コンクリーション化剤による岩盤亀裂・断層シーリング実証試験研究

吉田英一, 山本鋼志, 淺原良浩, 刈茅孝一, 望月陽人

令和7年度日本応用地質学会研究発表会 2025.10.10 一般社団法人日本応用地質学会

Well-preserved radiolarian fossils from the Miocene Tasselia concretion and its formation process International conference

Kikukawa, A., Takahashi, S., Abe, O., Asahara, Y., Furukawa, N., Yoshida, H., Katsuta, N., Aita, Y.

InterRad (XVII) 2025.9.24

Comparison of rare earth element compositions of proximal and distal tephra (B-Tm) from the Changbaishan Eruption at AD 946.

Nara, F., Asahara, Y., Suzuki, T., Machida, H.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.17 Geochemical Society of Japan

Event date： 2025.9

Language：Japanese Presentation type：Poster presentation

The B-Tm tephra, erupted from Mount Baekdu (Changbaishan) in A.D. 946, is widely distributed across East Asia. It represents a key stratigraphic marker for tephrochronology and the reconstruction of late Holocene volcanic activity. In this study, glass shards were collected from proximal deposits near the source and from distal deposits in Aomori Prefecture, Japan. Rare earth element (REE) compositions were analyzed using inductively coupled plasma mass spectrometry (ICP-MS). The REE patterns of both proximal and dSistal samples show overall similarity, especially in light REEs, indicating their effectiveness for tephra correlation. Slight differences in middle to heavy REEs may reflect grain-size sorting during atmospheric transport or post-depositional alteration. These results suggest that REE compositions, being less susceptible to chemical weathering, provide a reliable geochemical proxy for identifying tephras across varying depositional environments.

DOI： 10.14862/geochemproc.72.0_106

CiNii Research

Magma genesis of the Osore Volcano in the Aoso-Osore volcanic zone, Northeast Japan arc based on boron concentrations and Sr-Nd isotopic compositions

Wakayama, K., Asahara, Y., Orihashi, Y., Shinjoe, H., Osawa, T., Sasaki, M.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.17 Geochemical Society of Japan

Eu isotope ratios of the igneous rocks, feldspar minerals and hydrothermally altered volcanic rocks International coauthorship

Lee, S.G., Tanaka, T., Chen, S., Asahara, Y., Lee, T.J., Kim, G.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.18 Geochemical Society of Japan

Application of geochemical analysis to Jomon pottery from the Tenjinyama site, Aichi prefecture

Tsuchiya, T., Kadowaki, S., Asahara, Y.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.17 Geochemical Society of Japan

Event date： 2025.9

Language：Japanese Presentation type：Poster presentation

The objective of this study is to reveal the constituent materials and origin of pottery materials (clay paste) from the early Jomon period pottery excavated from the Tenjinyama Site in Minamichita Town, Aichi Prefecture, by conducting chemical and isotopic analyses. This study will concentrate the correlation between archaeological pottery types defined by patterns and chemical and isotopic data.We have conducted quantitative analysis of major elements using XRF, quantitative analysis of trace elements, including rare earth elements, using ICP-MS, and Sr isotope analysis using TIMS on 20 pottery shards belonging to four pottery types. The results show a tendency for variation in the major element composition among the pottery types, which is indicative of the elemental composition of the source materials. Additionally, the results of the 87Sr/86Sr isotope analysis suggest the presence of a two-component mixture. A comprehensive examination of data pertinent to the various pottery types and the stratigraphic context of pottery shards will be conducted to discuss the temporal changes in pottery production activities at the Tenjinyama Site.

DOI： 10.14862/geochemproc.72.0_242

CiNii Research

How do cold climate and low lithium content in surrounding rocks limit the lithium potential of Urmia Lake, NW Iran, compared to other brine lakes? International coauthorship

Daneshvar, N., Azizi, H., Minami, M., Asahara, Y.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.17 Geochemical Society of Japan

Rapid formation of Subantarctic Mode Water (SAMW) during the Middle Miocene Climate Transition (MMCT) International coauthorship

Horikawa, K., Khim, B.-K., Asahara, Y.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.19 Geochemical Society of Japan

Chronostratigraphy and magma genesis of the Ikokuma Andesites in the Northwestern Shimokita Peninsula, Aomori prefecture, Japan

Ishikawa, S., Orihashi, Y., Ogasawara, M., Sasaki, M., Kanazashi, Y., Asahara, Y., Iwano, H., Shinjoe, H., Amano, T., Umeda, K., Osawa, T., Hirata, T.

72nd Annual Meeting of the Geochemical Society of Japan 2025.9.17 Geochemical Society of Japan

三浦半島に分布する葉山層群から産出した生痕化石Tasselia ordamensisのコンクリーション化過程

菊川照英, 高橋聡, 阿部理, 淺原良浩, 古川登, 吉田英一, 勝田長貴, 相田吉昭

日本地質学会第132年学術大会 2025.9.15

青森県下北半島西部，佐井地域に産する中新世火山類の産状とジルコンU-Pb年代

金指由維, 折橋裕二, 竹森瑞葉, 岩野英樹, 仁木創太, 佐々木実, 盛合秀, 淺原良浩, 天野格, 梅田浩司, 平田岳史

日本地質学会第132年学術大会 2025.9.16

アパタイト微量元素組成を用いた南東北に分布する中新世－第四紀の凝灰岩と海洋コアに挟在する凝灰岩との対比の試み

冨樫琴美, 髙嶋礼詩, 折橋裕二, 淺原良浩, 永橋こう輝, 北見匠, 黒柳あずみ

日本地質学会第132年学術大会 2025.9.15

紀伊半島東部領家深成岩類のジルコンU–Pb年代に基づくマイロナイト化時期：三重県飯南地域の例

李琪, 竹内誠, 淺原良浩

日本地質学会第132年学術大会 2025.9.15

紀伊半島東部領家深成岩類のジルコンU–Pb年代に基づくマイロナイト化時期：三重県三杉地域南部における75Ma苦鉄質岩〜中間質岩類と花崗岩類の地質構造

檜垣悠斗, 竹内誠, 李琪, 淺原良浩

日本地質学会第132年学術大会 2025.9.15

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