著者

鈴木 毅彦

出版者

特定非営利活動法人 日本火山学会

雑誌

火山 (ISSN:04534360)

巻号頁・発行日

vol.37, no.5, pp.251-263, 1992

参考文献数

22

被引用文献数

11

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Nasu Volcano is a polygenetic volcano locating on the volcanic front of Northeast Japan Arc. The eruptive history of this volcano during the last 350,000 years is clarified by tephrochronology. On the eastern foot of this volcano, 16 pyroclastic fall deposits are identified. The stratigraphic relations of these deposits with well dated tephra layers derived from other volcanoes provided the chronological framework for the eruptive history. Moreover, the estimated ages and volumes of each deposits, determined by an empirical formula, gave eruption rate of pyroclastic fall deposits. Nasu-Shirakawa Tephra Group (Sr1 to Sr12) erupted from 350 ka to 200 ka. The frequency of explosive eruption during this period is 0.08 times per 1000 years, and eruption rate of pyroclastic fall deposits in dense rock equivalent volume is 0.016 km³ per 1000 years. On the other hand, a K-Ar dating chronology for Nasu Volcano carried out by a previous study shows that no effusions of lava flows occurred during this period. After this period, no obvious explosive eruptions occurred until 55 ka. This non explosive period is most likely corresponds to the stage characlerized by effusions of lava flows which was recognized by the K-Ar dating chronology. The eruption rate of this period is larger than that of former period from 350 ka to 200 ka. The younger stage from 55-50 ka to present is not characterized only by explosive eruptions (occurrences of Kuromori Tephra and Oshima Tephra 1 and 4; Kr, Os 1 and 4) but also by effusions of lava flows, occurrences of pyroclastic flows, formations of lava dome and pyroclastic cone. The frequency of explosive eruption and the eruption rate of pyroclastic fall deposits during this period are 0.06 times per 1000 years and <0.003 km³ per 1000 years, respectively. Both are smaller than those of the period from 350 ka to 200 ka.

著者

ラジャ アブドゥ ムフティ 鈴木 毅 吉住 優子 向阪 真理子 山内 清史 山本 葵 松原 茂樹 奥 俊信

出版者

Architectural Institute of Japan

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.77, no.675, pp.979-986, 2012

被引用文献数

1

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This paper analyzes an environment sharing system from a field survey of 225 <i>Bale bales</i> (Endai-like furniture) in Lae Lae isle, Makassar, Indonesia. <i>Bale bales</i> are owned by individuals and used by entire households. However, 1) <i>Bale bales</i> are sometimes moved to better environments not only by owners but also by neighbors.<br>2) Whether or not they have their own <i>Bale bales</i>, many islanders use the <i>Bale bales</i> of other families located in comfortable environments (for example, the seashore, a street corner, or a public square) far from their homes.<br>3) Not only relatives but also neighbors and visitors are permitted to use each <i>Bale bale</i> on the island.<br>By following these customs and rules, islanders can share a good environment on their high-density island.

著者

南里 翔平 鈴木 毅彦

出版者

日本地球惑星科学連合

雑誌

日本地球惑星科学連合2016年大会

巻号頁・発行日

2016-03-10

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群馬県中部に位置する赤城山は周囲約25 kmに及ぶ大型の成層火山である.守屋(1968)はこの発達史をはじめて体系的にまとめた.その中で約4.4万年前に噴出した赤城鹿沼テフラ(Ag-KP;青木ほか,2008)の上位に足尾帯由来のチャートや頁岩からなる降下火砕物があることを報告し,これを水沼石質降下火砕岩層(CLP)とした.本研究では守屋(1968)ほかで詳細に明らかにされてこなかった,CLPの分布,層序,構成岩種,噴出量,噴火様式,前後の噴火史を明らかにすることを目的とした.赤城山東麓の桐生市黒保根町下田沢を流れる清水用水沿いの露頭(赤城山山頂から南東約10 km)では,下位から榛名八崎テフラ(Hr-HP),Ag-KP,CLP,赤城小沼(この)石質降下テフラ(Ag-KLP)がそれぞれ観察できる.この地点におけるCLPは岩相から4つの噴火ユニットに分けることができ,下位から1L,2P,3P,4Lとした.このうち1L,4Lは足尾帯由来と考えられる堆積岩・火成岩(たとえばドレライトなど)の亜角礫が主体である.1Lは平均粒径13 mmの火山豆石を含む単層と,その上位に堆積する平均粒径32 mmの亜角礫層からなる.このことから1Lはマグマ水蒸気爆発の堆積物であると考えられる.2Pは発泡の悪い黄色軽石火山礫からなる.この軽石火山礫の火山ガラス部の主成分化学組成は,下位のAg-KP中のそれらとは明らかに異なり,SiO2の重量%がAg-KPのそれよりも高いことがわかった.このことから,この軽石はAg-KPの噴火以後,赤城山のマグマだまり内部で結晶分化作用が進行した結果生成されたマグマに由来するものであると考えられる.守屋(1968)はCLPを水蒸気噴火の堆積物としたが,本研究では2Pの存在からこれをマグマ噴火であると考えた.また,2Pは給源から東方に約50 km離れた日光市や鹿沼市など広域に分布していることが確認されたので,プリニー式の噴火であった可能性が高い.3Pは2P中の軽石と同じ組成を持つ軽石と,堆積岩の亜角礫層との互層からなることから,このユニットに関しても2Pに引き続くプリニー式のマグマ噴火であったと考えられる.4Lは層厚9 cmの細粒火山礫層と,その上位に堆積する亜角礫層とからなることから,マグマ水蒸気噴火の堆積物である可能性が考えられる.CLPは赤城山の類質物や異質物からなる堆積岩主体の堆積物であると考えられてきたが,以上のようにマグマ噴火による本質軽石を伴うことがわかったので,新たに赤城清水石質テフラ(Ag-SLT)の名称を用いることを提案する.Ag-SLTは総噴出量約6 km3に達する.この値はVEI=5に相当し,富士山の宝永噴火(1707年)に匹敵するレベルのプリニー式噴火である.鈴木(1990)はAg-KPの主体をなす降下軽石堆積物直上に降下火山灰を認めたが,それを覆うCLPまで含めて一連の噴火による堆積物と解釈した.本研究では清水用水の露頭においてAg-KPの降下軽石堆積物直上の降下火山灰層をAg-KP(a) とあらためて定義し,灰噴火に由来すると解釈した.またこれと区別するため,従来の赤城鹿沼テフラ(Ag-KP)と呼ばれている降下軽石堆積物をAg-KP(p) と再定義した.ところでAg-KP(a)/ Ag-SLT(1L)境界付近を詳しく観察すると,有機物に富み,層理が不明瞭で,淘汰が悪い層厚12 cmの地層が存在する.このことから,Ag-KP(a)/ Ag-SLT(1L)間にはロームが存在すると考えられる.つまり,Ag-KP(p) のプリニー式噴火後は引き続きAg-KP(a)の灰噴火が発生したが,Ag-SLTの噴火までには,わずかではあるが噴火の休止期があった可能性が示唆される.引用文献青木ほか(2008)第四紀研究,47,391-407.守屋(1968)前橋営林局,p64.鈴木(1990)地学雑誌,99,60-74.

著者

田中 康裕 鈴木 毅

出版者

一般社団法人日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.73, no.632, pp.2107-2115, 2008-10-30

被引用文献数

1 5

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It is important that we associate with those who are not intimate with us. To clarify where contacts with these people take place, we paid attention to acquaintances of different generation for children and youth. The purpose of this article is to clarify where children and youth contact with acquaintances of different generation. The survey of this article is questionnaire to university students. This article clarified following things. Many people whom children and youth contact are considered to be "hosts of the place", who are always at the place, who cherish the place, and who play some role there. Because "hosts of the place" are always at particular place, if children and youth want to meet them, they can go there. And even if children and youth don't intend to meet them, they meet them inevitably when they go there. And many contacts with acquaintances of different generation take place not at public places but at semi-public places.

著者

鈴木 毅彦 斎藤 はるか 今泉 俊文

出版者

The Geological Society of Japan

雑誌

日本地質学会学術大会講演要旨 (ISSN:13483935)

巻号頁・発行日

pp.335, 2013 (Released:2014-04-01)

著者

森 傑 舟橋 國男 鈴木 毅 木多 道宏

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.66, no.540, pp.181-187, 2001

被引用文献数

8 1 2

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From the point of view of environment behavior studies, this paper proposes an alternative approach in housing environment design drawn from recent ethnomethodological developments in sociology, social science, anthropology and cognitive science. The orientation in design action led by an architect is constituted through the sequence construction of conversation between the architect and the client, and the contents of housing environment design develop through the customary regulation and restriction in conversation. It becomes clear that we must re-study the premise which communication can build a consensus because the orientation acts on the client as force or power and controls his independence.

著者

鈴木 毅彦

出版者

学術雑誌目次速報データベース由来

雑誌

地理学評論. Ser. A (ISSN:00167444)

巻号頁・発行日

vol.73, no.1, pp.1-25, 2000

被引用文献数

15 14

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飛騨山脈南西部の貝塩給源火道から噴出した貝塩上宝テフラ (KMT) は,大規模火砕流堆積物と中部~東北南部を覆った降下テフラからなる大規模テフラである.本稿ではその特性・分布・年代を示し,噴出前後に形成された地形面の編年・古地理について論じた.KMTの認定においては,黒雲母・石英・高ウラン濃度ジルコンの存在,火山ガラス・チタン磁鉄鉱の化学組成を指標とした.従来の放射年代値と房総半島上総層群中での層位から,KMTは海洋酸素同位体ステージ (MIS) 17.3~15.2に降下し,その年代は0.58~0.69Maの間と判断された. KMTは関東の狭山面・阿須山面・喜連川丘陵上位面,松本盆地の梨ノ木礫層堆積面形成後まもなく降下した.これら地形面はMIS17~16に形成されたと推定され,当時は扇状地面を広く発達させる地形形成環境があったとみられる.また, KMT噴出時,飛騨山脈中軸部がすでにかなりの高度を有していた可能性を指摘し,阿武隈山地に発達する小起伏面群の形成年代の上限を示した.

著者

鈴木 毅彦 藤原 治 檀原 徹

出版者

Tokyo Geographical Society

雑誌

地学雑誌 (ISSN:0022135X)

巻号頁・発行日

vol.113, no.1, pp.38-61, 2004

被引用文献数

4 15

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This study shows the revised stratigraphy and correlations of the middle Pleistocene tephras in and around the Aizu area, Northeast Japan. Significant marker tephras in this area are as follows, in descending order of stratigraphy : Nm-SB, TG, Hu-TK, and Kn-KD from volcanoes adjacent to Oze, So-OT, and APm. Stratigraphic positions of Sn-MT and Sn-SK are not clear, but they seem to be positioned near Kn-KD.<BR>Nm-SB (110 ka) from Numazawa caldera is mainly a plinian pumice fall deposit distributed in the central to western part of Fukushima Prefecture and northern part of Tochigi Prefecture. Eruption producing Nm-SB associated with ash fall, plinian eruption, and pyroclastic flow or pyroclastic surge. TG (125-135 ka), which is characterized by volcanic glass shards with a low index, was probably derived from the Sunagohara caldera. The distribution of fall-out tephra of TG is similar to that of Nm-SB, and pyroclastic flow deposit of TG is recognized southwest to west of the Numazawa caldera and along the western margin of the Aizu basin. The eruption process of TG comprises plinian eruption, pyroclastic flow, and plinian eruption.<BR>So-OT (300-330 ka) is composed of an ignimbrite and a fall-out tephra derived from the Shiobara caldera. This ignimbrite is known as Otahara pyroclastic flow deposit. On the other hand, fall-out tephra of So-OT has been newly identified. APm tephra beds are significant widespread tephras derived from volcano in the Hida mountains at 330-400 ka. This study corrects a correlation of APm in this area, which was shown by Suzuki (1993). Tephras identified as APm in this study are Nm-13, -14, -16 tephras below So-OT.<BR>Sn-MT (180-260 ka : FT ages) is composed of an ignimbrite and a fall-out tephra derived from the Sunagohara caldera. The former is part of the Sunagohara-Kubota tephra reported by Yamamoto and Sudo (1996) and the Pyroclastic Flow Deposit I reported by Mizugaki (1993). The latter is the Sunagohara-Kachikata tephra along the western margin of Aizu basin reported by Yamamoto and Sudo (1996), and the Okayaji Volcanic Ash Layer at the eastern foot of Adatara volcano reported by Soda and Saijo (1987). Sn-SK (220 ± 50 ka : FT age), originating from the Sunagohara caldera, was defined by Yamamoto and Sudo (1996). Sn-SK is composed of an ignimbrite and a fall-out tephra characterized by abundant accretionary lapilli. The latter is correlative to the Minowa Volcanic Ash Layer (Soda and Saijo, 1987) distributed at the eastern foot of Adatara volcano.<BR>All pyroclastic deposits derived from the Numazawa caldera are Nm-NM (5 ka), Nm-KN (50-55 ka), and Nm-SB (110 ka), and those from the Sunagohara caldera are TG (125-135 ka), Sn-MT (180-260 ka), and Sn-SK (220 ka). This means that, at both caldera, explosive eruptions occurred three times over 260, 000 years, and it appears that the active period of explosive eruptions moved from the Sunagohara caldera to the Numazawa caldera. This resulted in the preservation of volcanic landforms with more dissected caldera landforms at the Sunagohara caldera. Intervals between eruptions at the Numazawa caldera range from 50, 000 to 60, 000 years, and the volumes of the three products are similar, indicating periodic and regular activities with a discharge rate of 0.02-0.06 DRE km<SUP>3</SUP>/1, 000 years. On the other hand, the mean interval of eruptions at the Sunagohara caldera is 70, 000 to 40, 000 years, and the discharge rate is estimated to be 0.05-0.08 DRE km<SUP>3</SUP>/1, 000 years : the latter is equivalent to or a little larger than that of the Numazawa caldera.

著者

鈴木 毅彦

出版者

渋沢栄一記念財団

雑誌

青淵 (ISSN:09123210)

巻号頁・発行日

no.766, pp.19-21, 2013-01

著者

李 華 鈴木 毅 奥 俊信 木多 道宏 松原 茂樹

出版者

一般社団法人日本建築学会

雑誌

学術講演梗概集. E-1, 建築計画I, 各種建物・地域施設, 設計方法, 構法計画, 人間工学, 計画基礎 (ISSN:13414518)

巻号頁・発行日

vol.2006, pp.971-972, 2006-07-31

著者

田中 康裕 鈴木 毅 松原 茂樹 奥 俊信 木多 道宏

出版者

日本建築学会

雑誌

日本建築学会計画系論文集 (ISSN:13404210)

巻号頁・発行日

vol.72, no.613, pp.135-142, 2007

被引用文献数

6 12

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This article studies the formation of the purpose at Shimoshinjo-Sakuraen. A method of this article is interview to master of this Community-Cafe. This article clarified following things. The purpose of Shimoshinjo-Sakuraen is offering an opportunity of social contact to people. Participating in activity was thought to be important at this Community-Cafe at first. Now, Shimoshinjo-Sakuraen is the place where people can spend without participating in activity. This means various type of the social contact come to be permitted there and means the substance of the purpose has been formed through management of Shimoshinjo-Sakuraen.