著者

八幡 正弘 黒沢 邦彦 大津 直 高橋 徹哉 戸間替 修一 川森 博史 毛利 元躬

出版者

資源地質学会

雑誌

資源地質 (ISSN:09182454)

巻号頁・発行日

vol.44, no.1, pp.1-16, 1994-02-28

参考文献数

21

被引用文献数

3

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Terrestrial volcanic products and lacustrine deposits of Middle Miocene to Pliocene age are widely distributed in the Monbetsu-Kamishihoro Graben which belongs to the Kuril Inner Arc. The Seta deposit located in the southern extremity of the Graben is classified into a hot spring gold deposit, based upon the modes of occurence.<BR>In the Seta mine area, Middle Pliocene lacustrine deposits of the Ashoro Formation which were accumulated in the Tokachi Basin unconformably covers Late Miocene to Early Pliocene terrestrial volcanic products of the Horokapiribetsugawa Formation. The lacustrine deposits are composed of sandstone, mudstone and siliceous deposits associated with a hot spring gold mineralization. A wide variety of sedimentary structure of the lacustrine deposits is observable in this area ; for detailed investigation, a logging of 80 meters of new diamond drill core (GSH-91-1) was necessary, which revealed the sedimentary structure of the basal part of the deposits and the relationship of the Horokapiribetsugawa and the Ashoro Formations. Siliceous deposits have been divided into 5 types, S-I to S-V. Silica is deposited as silica sinter (S-I) on land and/or temporally on shore near the water line, and also conducted into the cold lake water by the thermal water as a thin bedded siliceous deposit (S-II), because the silica gelation quickly proceeds under the influence of current or wave. The hydrothermal eruption broke up the underlying rocks for breccias like a clastic dike and, as a result, scattered breccias, so-called hydrothermat explosion breccias (S-IV) and/or the accidental silica blocks (S-III) in tuff and sandstone. When the hydrothermal eruption took place intermittently in shallow water, silica was deposited as silica complex deposit with sandstone and conglomerate (S-V)<BR>The hydrothermal activity has been divided into seven stages (I to VII). In the Stage I, just prior to form the lake, the acid hydrothermal activity, began, resulting in the silicified and argillized zones in the Horokapiribetsugawa Formation. Stage II, is characterized by the prevalence of hydrothermal explosion breccias on the land of the northern edge of the lake. As mixing of the ascending acid thermal water with the cold groundwater or interstitial water in the basal part of the lacustrine deposits and the argillized rocks of the Horokapiribetsugawa Formation just under the surface of unconformity, adularia formed in sandstone and argillized tuff breccia with kaolin minerals as an alteration product. In the Stages III and V, the hydrothermal activity increased and silica was deposited on the land and/or on the bottom of the lake resulted in silica sinter, thin, bedded siliceous deposit and siliceous complex deposit. Stages IV and VI-1 are similar to Stage II. It may be inferred that the hydrothermal activity was carried on the shore of the lake or the land. In the Stage IV-2, the silica sinter which deposited to a thickness of about 2 meters on land. The hydrothermal activity has silicified to the surrounding rocks and has formed vertical and horizontal quartz veins in these rocks. In the Stage Vll, the hydrothermal activity was attenuated.<BR>These spots of the hydrothermal activity moved from north to south associated with the gold mineralization.

著者

若林 大志 稲木 杏吏 廣正 智 森 博史 渡辺 悟 山瀬 喬史 赤谷 憲一 萱野 大樹 絹谷 清剛

出版者

日本内分泌外科学会・日本甲状腺外科学会

雑誌

日本内分泌・甲状腺外科学会雑誌 (ISSN:21869545)

巻号頁・発行日

vol.35, no.4, pp.255-258, 2018 (Released:2019-02-15)

参考文献数

19

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手術不可能あるいは遠隔転移や局所再発を繰り返す悪性褐色細胞腫の治療として,131I-metaiodobenzylguanidine (MIBG)による内照射療法が行われる。131I-MIBGの腫瘍集積は極めて選択的かつ特異的であり,欧米では30年近い治療経験が蓄積されている。一方で,国内では放射線管理にかかる諸問題があり利用は限られていた。近年,悪性褐色細胞腫・パラガングリオーマに対する低用量131I-MIBG治療の多施設共同研究が先進医療Bとして実施され,2017年度には131I-MIBG治療の薬事承認取得を目的とした企業治験が国内で開始されるなど,131I-MIBG治療が我が国でも広がりつつある。本稿では131I-MIBG治療の現況と展望を紹介し,内照射療法の普及がよりいっそう進むことを期待する。

著者

渡部 公也 森 博史 小松原 明哲

出版者

一般社団法人 日本人間工学会

雑誌

人間工学 (ISSN:05494974)

巻号頁・発行日

vol.51, no.Supplement, pp.S110-S111, 2015-06-13 (Released:2015-08-06)

著者

星合 和基 金澤 毅 平沼 謙二 太田 功 福井 壽男 森 博史 長谷川 明

出版者

社団法人日本補綴歯科学会

雑誌

日本補綴歯科學會雜誌 = The journal of the Japan Prosthodontic Society (ISSN:03895386)

巻号頁・発行日

vol.39, no.3, pp.494-500, 1995-06-01

参考文献数

21

被引用文献数

9 2

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この研究は色調の安定性を改善した常温重合レジンについて検討したもので,レジン中の触媒にバルビツール酸誘導体と4級アンモニウム塩を用いたものである.このレジンの色調,物性,適合度について現在市販されている各種の常温重合レジンと比較検討したものである.その結果をみると,1.色調は安定し,変色はみられない,2.機械的強さはほぼ同程度である,3.適合性は優れていることが示されたので,臨床上有用な新しい常温重合レジンといえよう.