| Project/Area Number |
63550466
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
資源開発工学
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| Research Institution | Waseda University |
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Principal Investigator |
IMAI Naoya Waseda University School of Science and Engineering professor, 理工学部, 教授 (80063139)
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| Co-Investigator(Kenkyū-buntansha) |
内田 悦生 早稲田大学, 理工学部, 専任講師 (40185020)
鞠子 正 早稲田大学, 教育学部, 教授 (00063454)
橋本 文作 早稲田大学, 理工学部, 教授 (50063269)
山崎 純夫 早稲田大学, 理工学部, 教授 (20063240)
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| Project Period (FY) |
1988 – 1990
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| Project Status |
Completed (Fiscal Year 1990)
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| Budget Amount *help |
¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1990: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1989: ¥800,000 (Direct Cost: ¥800,000)
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| Keywords | The Nabeyama Formation / The Upper Limestones / Izuru Formation / (Kuzuu) Central Fault / Tagen Mine / Okada Mine / Mitsumine area / Dolostone / 上部石灰岩層 / 鍋山累層 / 出流累層 / 下部石灰岩部層 / 中部ドロマイト岩部層 / 上部石灰岩部層 / ナップ構造 / 葛生地域 / 栃木県 |
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| Research Abstract |
The results of field and laboratory works, which have been done in the past three years will be summarized as follows.
1) The field relation between the Aisawa Formation with beet-like shape and the underlying the Lower Limestones of the Nabeyama Formation is thrust fault in part and unconformity in part.
2) The petrochemical studies by XRF and thin section petrography of basaltic rocks of the Izuru Formation represent alkaline basalt of oceanic is laud type. On the other hand, the basaltic dykes, which intruded into the Nabeyama Carbonate Formation belong to volcanic are type.
3) At the Tagen mine, the dark gray dolomitic limestones of the upper limestones near the basaltic dyke suffered from bleaching, changing into white rocks with krucite-calcite-dolomite assemblage, however, the presence of brucite has not been recognized under optical microscope. Recently, very fine grains of brucite (2-3mum in size were confirmed by back-scatter electron image.
4) Synclinal structure in the Mitsumine area, represented by eynclinal axis with strike of N40ﾟE and SW-plunging, is not so simple and rather synclinorium.
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