著者

小林 俊一 藤田 至則 佐藤 修 高浜 信行 青山 清道 和泉 薫 鈴木 幸治 遠藤 治郎 大川 秀雄 対馬 勝年 川田 邦夫 矢野 勝俊 前野 紀一 西村 浩一 遠藤 八十一 成瀬 廉二 佐藤 和秀

出版者

日本自然災害学会

雑誌

自然災害科学 (ISSN:02866021)

巻号頁・発行日

vol.5, no.1, pp.56-59, 1986-03-31

著者

吉村 尚久 藤田 至則 山岸 いくま

出版者

日本地質学会

雑誌

地質学論集

巻号頁・発行日

no.9, pp.195-201, 1973

被引用文献数

2

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Alteration of the Green tuff formation took place in regional scale and is characterized by green colored pyroclastic rocks. Relation between tectonic movement and alteration in the developing process of basin is summarized as the following table. [Table]

著者

藤田 至則

出版者

地学団体研究会

雑誌

地学教育と科学運動 (ISSN:03893766)

巻号頁・発行日

no.29, pp.35-36, 1998-04-25

著者

藤田 至則

出版者

日本地質学会

雑誌

地質學雜誌 (ISSN:00167630)

巻号頁・発行日

vol.74, no.2, 1968-02-25

著者

藤田 至則

出版者

地学団体研究会

雑誌

地球科學 (ISSN:03666611)

巻号頁・発行日

vol.43, no.6, pp.417-427, 1989-11-25

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In this paper the writer maintains the following four points of view; 1. During the geological times sediments were always concentrated and laied down in limited areas, i.e., sedimentary basins. All the present coastal plains and intramountain basins in the Japanese Islands are final products of the lowland that has been developed since the Cretaceous. Thus, sedimentary basin, coastal plain and intramountain basin in this case are included into a same category. 2. Two types of generative process of sedimentary basin are generally known. One is collapse, i.e., downthrowing of basement block to produce a depression bounded by faults. The other is subsidence, i.e., down-warping of basement to form a basinal depression. Giving several examples, the writer pointed out previously that down-warping of sedimentary basin was nothing else than a surface phenomena of underground fracturing or collapsing. In this respect, generation of a sedimentary basin due to subsidence would be synonymous with occurrence of a collapse under the ground. 3. The category of "Shogidaoshi (Fujita, 1951)" does not involve any genetic definitions, since it is a term defining a configuration of sediments of which depocenter shifts unidirectionally. Some people who do not accept the term "Shogidaoshi" want to replace it with the other terms such as "tilting block movement" or "Shogidaoshi" (unidirectional shifting of upheaval to bring migration of depcenter)". They, however, must have misunderstood the original definition of the term excluding its mechanism. 4. The law of "Shogidaoshi" is applicable to a developing stage of pre-existing sedimentary basin, not to a generative stage of new sedimentary basin. Incidentally, it rarely happens that a new sedimentary basin of exotic nature is generated just in front of unidirectional shift of a "Shogidaoshi". Such a case is accidental, being out of applicable extent of the law of "Shoeidaoshi".

著者

藤田 至則

出版者

日本地質学会

雑誌

地質学論集 (ISSN:03858545)

巻号頁・発行日

no.20, pp.147-158, 1981-03-30

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The gist of the present paper is itemized below. 1. The outline of the sedimentary basin of the Kanto plain was determined by the collapse basin of the formative stage of the Late Pliocene Kurotaki unconformity and the collapse basin of the Early Pleistocene Minamitama stage (Fig. 2). 2. Due to the fractures of NE-SW and NW-SE trends that began to develop during the period from the Nagahama stage at the end of Early Pleistocene to the Naganuma stage of the early Middle Pleistocene, the uplands and alluvial plains were taking form macrotopographically in the Kanto plain and they became distinct during the Late Pleistocene as seen today (Fig. 3). 3. Collapse basins of the Kurotaki and Nagahama stages were formed along the fractures that were caused by the upheaval of the area centering around the basins (Fig. 1, B). 4. Collapse or relative subsidence of lowlands in the Nagahama stage and since the Shimosueyoshi stage procceded as the pre-existent fractures were reactivated with the regional upheaval (Fig. 3). 5. The law of the shogi-daoshi structure (sedimentary imbricate structure) is essentially a unidirectional shift of the thickest portion of a group of formations within one basin (Fig, 4). This structure is interpreted as a result of reactivation of fractures which developed when the basin was formed (Fig. 1,B). 6. When plural sedimentary basins whose longer axes run parallel are formed, the formations in each basin may present a shogi-daoshi structure of such a type as mentioned above, and occasionally this structure is found to involve the whole basins (Fig. 5). The occurrence of the shogi-daoshi structure can be classified into two kinds. One is the case where plural basins are formed simultaneously. This kind is noticed in many geosynclines (Fig. 5). The other kind is the case when the shogi-daoshi structure occurring within one basin proceeds into another basin in front of the first basin (Fig. 6). However, this kind is not fully investigated yet and it requires further study. 7. A general direction of the shogi-daoshi structure was from the continental side toward the Pacific side during the Paleozoic〜Middle Mesozoic period, and from the Pacific side toward the continent since the Middle Mesozoic to the present. And, as pointed out by Yano (1980), the direction of the shogi-daoshi structure in the stage of the Green Tuff geosyncline and that in the stage of the Island Arc disturbance are intersecting at right angles, and they intersect the principal axes of the basins at right angles. It is possible, however, that the principal axes of the basins have changed their directions later.

著者

藤田 至則

出版者

地学団体研究会

雑誌

地球科學 (ISSN:03666611)

巻号頁・発行日

vol.48, no.6, 1994-11-25