巻号一覧
26 巻 (1972)
- 6 号 p. 235-
- 5 号 p. 183-
- 4 号 p. 139-
- 3 号 p. 91-
- 2 号 p. 47-
- 1 号 p. 1-
26 巻, 4 号
選択された号の論文の11件中1～11を表示しています
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八木 健三原稿種別: 本文
1972 年 26 巻 4 号 p. ii-iii
発行日: 1972/07/25
公開日: 2017/07/26
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猪木 幸男, 滝沢 文教, 片田 正人原稿種別: 本文
1972 年 26 巻 4 号 p. 139-148b
発行日: 1972/07/25
公開日: 2017/07/26
ジャーナル オープンアクセスThe geological differences between the Ojika peninsula and Kinkazan islet, Miyagi Prefecture, have been known very well since about 70 years ago (Kikuchi, Y., 1891 and Iki, J., 1901); the former is composed principally of the Mesozoic sediments and volcanics, partly intruded by dioritic and gabbroic rocks, and the latter, of granitic rocks, gneissose quartz-diorite and granodiorite accompanied with metamorphic rocks, which were named the Kinkazan metamorphic rocks, such as biotite schist, amphipolite, quartz schist, etc., constituting a narrow belt along the north western margin of the islet. And it has been considered that a fault zone might run from north to south, under a strait of the Kinkazan-seto between the Ojika peninsula and the Kinkazan islet. Quite recently, in this estimated fault zone, dunitic ultramafic rock, partially serpentinized, is found, occurring as a shore roof along the coastcliff of the Kinkazan metamorphic rocks. So, we propose here that the fault zone, with the ultramafic rock, in the Kinkazan-seto, is favourable to be called as the " Kinkazan tectonic line", and the area, composed of the above-mentioned rocks as seen in Kinkazan islet, may correspond to a structural belt, "Kinkazan structural belt". Although the gneissose quartz diorite of Ashizima islet is of the northern extension of the equivalent in Kinkazan islet, the other rocks, such as the" Kinkazan metamorphic rocks" and ultramafic rocks, are not found anywhere, in the north of the Kinkazan islet, because of lying themselves beneath the sea. However, it is fairly presumable that the further extension "towards the north, of the "tectonic line" or structural belt may accord with the median Kitakami structural belt (Kano and Seki, 1954) or the Hikami structural belt (Yamashita, 1957) in the northern part of the South Kitakami Mountains, judging from their geological enviornments.抄録全体を表示PDF形式でダウンロード (3066K) -
サロマ湖・網走湖・ノトロ湖・厚岸湖および厚岸湾近藤 務原稿種別: 本文
1972 年 26 巻 4 号 p. 149-158
発行日: 1972/07/25
公開日: 2017/07/26
ジャーナル オープンアクセスOnly a few reports have been hitherto published on the distribution factors of heavy metals from the sedimentological viewpoint, though many authors have reported physico-chemical factors of distribution. This paper represents the heavy metal distribution of the bottom sediments in some lagoons and bays in Hokkaido, which have been well studied from the sedimentological viewpoint. The results are summarized as shown below. 1) Five elements in the dried samples collected from the bottom surface are determined by emission spectrographic analysis as follows; Fe: 1.3-3.8%, Mn: 130-1000ppm, Mn/Fe: 0.006-0.050, Ni: <4-23ppm, Cu: 19-100 ppm, V: 33-160 ppm. 2) Careful examination suggests that the distribution of some metals depends on the depositional environments through all of the lakes and lagoons treated in this paper. Fe and Mn are concentrated in the sandy sediments of the marginal shallow part of the lakes and in the muddy sediments of the inflowing part of the river, while Cu is abundant in the muddy sediments of the delta and the central part. However, there are no characteristic differences of the distribution of Ni and V in the surveyed areas, except for the lake Abashiri, where all heavy metals have a decreasing tendency of their concentrations in the central deeper part of intensively reducing conditions.抄録全体を表示PDF形式でダウンロード (1071K) -
房総南端の褶曲の例(構造地質学ノート3)衣笠 善博, 垣見 俊弘原稿種別: 本文
1972 年 26 巻 4 号 p. 159-163
発行日: 1972/07/25
公開日: 2017/07/26
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若生 達夫原稿種別: 本文
1972 年 26 巻 4 号 p. 164-172
発行日: 1972/07/25
公開日: 2017/07/26
ジャーナル オープンアクセスRecently in Japan, the study of marine terraces has been advanced greatly, especially from the view point of the Qusternary research. The author, however, thinks that the study has been progressed without the effort of cognition on the essence of marine terraces; in other words, we have not yet fully answered the problem proposed by S. IJIRI (1953-"What the true character of marine terrace is ? (Kaigan-dankyu towa nanika)". This has been bringing about some confusion on the interpretation of marine terraces at the Quaternary research in Japan as well as at the school and university teaching. To elucidate such a problem, the author tried to collect data based on the bibliography and on his field works of marine terraces. The clarified facts are as follows: (1) The interpretation of marine terraces based on the Johnson's model is still popular in Japan as well as in Europe (Fig. 1). BIRD (1964,1968), for example, denied the existence of such marine terraces. (2) DIETZ and FAIRBRIDGE (1968) claimed that the shallow marine profile illustrated by JOHNSON (Fig. 2) is a fallacy. Even if it is true, JOHNSON (1919,1925) himself did not relate definitely the profile with marine terrace. The treatment of the JOHNSON'S shallow marine profile as the original form of marine terrace is the follower's mistake, although it is true that Johnson alluringly illustrated to do so. (3) The author thinks to be necessary to suggest to school and university students the existace of various marine terraces, i.e. metaphorically speaking, a marine terrace corresponds to a bed of sedimentary rock and other terrace to a member.抄録全体を表示PDF形式でダウンロード (1120K) -
杉山 新平原稿種別: 本文
1972 年 26 巻 4 号 p. 173-175
発行日: 1972/07/25
公開日: 2017/07/26
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傍島 武師原稿種別: 本文
1972 年 26 巻 4 号 p. 175-176
発行日: 1972/07/25
公開日: 2017/07/26
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堀川 秀夫, 藤田 郁男原稿種別: 本文
1972 年 26 巻 4 号 p. 176-177
発行日: 1972/07/25
公開日: 2017/07/26
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日本の第四紀層の14C年代(74)大池 昭二, 松山 力原稿種別: 本文
1972 年 26 巻 4 号 p. 178-179
発行日: 1972/07/25
公開日: 2017/07/26
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日本の第四紀層の14C年代(75)池田 碩, 石田 志朗原稿種別: 本文
1972 年 26 巻 4 号 p. 179-181
発行日: 1972/07/25
公開日: 2017/07/26
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日本の第四紀層14Cの年代(76)池田 碩, 石田 志朗原稿種別: 本文
1972 年 26 巻 4 号 p. 181-182
発行日: 1972/07/25
公開日: 2017/07/26
ジャーナル オープンアクセスPDF形式でダウンロード (249K)
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