著者

吉野 博厚

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.36, no.3, pp.128-149, 1982-05-25

---

Neogene marine sediments and volcanics are widely distributed in the so called "North Fossa Magna" region. The Suwa District, located in the southwest corner of the region, contains the Median Tectonic Line and the Itoigawa-Shizuoka Tectonic Line, which have been active since the Neogene. In terms of geological structure, the Suwa District is divided into two geologically different areas by the Itoigawa-Shizuoka Tectonic Line. 1) The stratigraphy of the Miocene series in the Suwa District is as follows: The Miocene series in the Moriya Area, located on the south side of the Lake Suwa, is called the Moriya subgroup. This subgroup is divided into the lower Moriya formation, which consists of clastic sediments with basal conglomerate, and the upper Gongenzawa formation, which consists of volcanics. The Miocene series in the Yokokawagawa Area, located on the north side of the lake, is known as the Takabochi subgroup. This subgroup is divided into the lower Yokokawagawa formation, which consists of coarse clastic sediments with andesite, and the upper Takabocchi formation, which consists of fine clastic sediments with basalt. The Gongenzawa formation can be correlated with the Yokokawagawa formation, and both can be correlated with the Uchimura formation in the Uchimura region. The Takabocch formation can be correlated with the Kokuzo basalt in the Uchimura region. The intrusions of Tertiary Granitoids, which consist of granodiorite, quartzdiorite, porphyrite, dolerite and rhyolite, are widely developed in both areas. 2) On the basis of the assemblage of secondary minerals identified in the volcanic rocks, the alteration and/or metamorphic area can be divided into the following six zones: I: Mixed layer mineral-Saponite Zone II: Chlorite-Mixed lay V: Actinolite-Chlorite Zone VI: Biotite-Actinolite Zone The zonation and distribution indicate that the alteration and/or metamorphism resulted from thermal or hydrothermal effects on the Tertiary Granitoids. 3) The geologic development of the area, especilly in the Miocene is mentioned below: (1) The Miocene basin was formed by collapses and the creation of sedimentary basin along the Median Tectonic Line in the Moriya stage. (2) Widespread and strong volcanism took place with collapses again in the Uchimura stage. At that time the center of the basin shifted northwards. (3) Plutonism and related metamorphism took place after the subsidence of the basin stopped. (4) After the plutonism an upheaval movement generated the volcano-plutonism at the crest of the area of maximum upheaval. This was accompanied simultaneously by hydrothermal alteration along the faults.

著者

井上 正澄 吉野 博厚 江口 孝夫 山科 起行 佐久間 広展

出版者

石油技術協会

雑誌

石油技術協会誌 (ISSN:03709868)

巻号頁・発行日

vol.80, no.1, pp.60-73, 2015 (Released:2017-05-10)

参考文献数

28

被引用文献数

1

---

The endowment, resources, reserves and production capacity of oil are estimated by global oil generation, field size distribution, discovery process and decline curve analyses. The historical fluctuation of oil price is almost explained by the excess production capacity over actual consumption, which is verified by the vector autoregression analysis. These results combined with economics described by energy consumption lead to a construction of an endogenous dynamic model, which successfully replicates the historical cyclic fluctuation of production and price, and can be used to analyze the evolution of energy resources.

著者

岩井 四郎 木下 房男 木内 一巳 小松 ★ 仁科 良夫 大木 正夫 島田 安太郎 千村 重平 梅村 弘 阿高 康行 遠藤 輝 藤田 敬 郷原 保真 石橋 俊明 石田 聖 小坂 共栄 熊井 久雄 三上 進 三谷 豊 水野 学 岡部 孝次 酒井 潤一 沢村 寛 下野 正博 新海 正博 杉山 茂 田辺 芳宏 田中 俊広 渡辺 晃二 山下 昇 矢野 孝雄 吉野 博厚

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.7, pp.297-304, 1972-12-25

被引用文献数

8

---

The Matsumoto Basin Research Group was organized in March, 1971, to clarify the geological history of the Matsumoto Basin. The results of studies obtained during the last year are as follows. 1) A geological map on the Quaternary of the Matsumoto Basin was constructed for the first time. 2) The crystal ash beds in the Nashinoki Loam Formation are correlated to the so-called biotite pumice beds (B_1, B_2, B_3) around Yatsugatake Volcano, while the crystal ash may had been erupted from the volcano around Kumonotaira to the north of Mt. Mitsumatarenge in the midst of the granitic rock area of the Japanese Northern Alps. 5) The Nashinoki Gravel Formation is the products of the first, large scale deposits filling up of the Basin with gravel. It shows that the formation of the Basin set out first in that age. 4) Simultaneously with the accumulation of the Nashinoki Gravel (or the subsidence of the Basin), the Northern Alps began to rise and the peculiar volcano (with the crystal ash) started its activity.

著者

新井 健司 石井 久夫 伊藤 孝 内田 克 遠藤輝 岡部孝次 熊井 久雄 小菅 範昭 近藤 洋一 郷原 保真 酒井 潤一 斎藤 義則 塩野 敏昭 島田 安太郎 下野 正博 隅田 耕治 角谷 邦明 関口 尚志 田中 俊廣 趙 哲済 中西 一裕 中島 豊志 中村 由克 林田 守生 松本 俊幸 三谷 豊 柳沢 文孝 山本 裕之 吉野 博厚

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.14, pp.93-102, 1977-02-21

被引用文献数

11

---

A wide-spread lake assumed to be larger than the recent Matsumoto Basin had existed in Early Pleistocene, and the Enrei Formation and its equivalent formations had been deposited in the lake. An extensively even erosion surface formed on the sediments in the latest Early Pleistocene is called the Ohmine geomorphologic surface. After the formation of the Ohmine surface, the recent mountainous areas such as the Northern Japan Alps, Mt. Hachibuse, Mt. Utsukushigahara and so on had been upheaved, while the Matsumoto Basin area had been depressed and the Nashinoki Gravel Formation, the upper Middle Pleistocene, had been deposited. The base of the Enrei Formation is 1,800 m above sea level in Mt. Hachibuse, while 700 m above sea level in the southern part of the Basin. The amount of upheaval of the mountainous areas can be estimated to be more than 1,000 m. The Matsumoto Basin area had been depressed again in the middle part of the Upper Pleistocene (about 40,000 years B. P.) and the Hata Gravel Formation had been deposited. The amount of depression may be estimated to be about 150 m in the eastern periphery of the middle part of the Basin.