1986 Fiscal Year Final Research Report Summary
Study of the variation of paleoenvironment based on the analysis of micro fossils and chemical fossils preserved in the sediment core of the Lake Biwa.
| Project/Area Number |
59392002
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
広領域
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| Research Institution | Kyoto University |
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Principal Investigator |
KOYAMA Mutsuo Research Reactor Institute, Kyoto University, 原子炉実験, 助教授 (80025329)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIWATARI Ryoshi Department of Chemistry, Faculty of Science, Tokyo Metropolitan Univ., 理学部, 教授 (90087106)
FUJI Norio Department of Education, Kanazawa Univ., 教育学部, 教授 (40019394)
NAKAMURA Toshio Isotope Research Center, Nagoya Univ., アイソトープ総合センター, 教務職員 (10135387)
NAKAI Nobuyuki Department of Geoscience, Faculty of Science, Nagoya Univ., 理学部, 教授 (40022529)
HORIE Shoji Station for Paleoenvironmental Study, Faculty of Science, Kyoto Univ., 理学部, 教授 (90025320)
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| Project Period (FY) |
1984 – 1986
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| Keywords | Lake Biwa / 1400 meter long core / paleowater depth / paleoenvironment / qlacier period / pollen analysis / micro-fossil / chlorophyll / carbohydrate / lignin |
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| Research Abstract |
Sampling if sediment-laver(20-40cm) was performed at the interval of every 3m from the top to the core depth of 800m on the 1400m long sediment core drilled from Lake Biwa. An inter-disciplinary research team was established so as to carry out the analysis of the core sample from various aspects. Namely, micro-fossils, such as pollens, and planktons, organic chemical fossils such as chlorophylls, fatty acids, carbohydrates and lignins, inorganic components from macro to trace elements and carbonisotope ratios were included.
On summarizing the results obtained, following conclusions were deduced.
1) During the period about 2.0-2.5 million years ago(core depth:804-732m), the site drille was like a swamp or a part of river with shallow water.
2) In R layer(core depth:732-582m), the water depth became a little deeper and a small lake or pond was formed.
3) In S layer(core depth:582-250), the lake water retreated and the lake disappeared.
4) In T layer(core depth:250-0m), the lake basin of the present Lake Biwa began to formed.
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[Publications] 堀江正治編,石渡良志,藤則雄,門田定美,堀江正治,横矢直道,井川猛,東保,藤原幸雄,横山卓雄,赤井浩一,上田誠也,中井信之,小山睦夫,小椋和子: "琵琶湖底深層1400mに秘められた変遷の歴史" 自費出般, 217 (1982)
Description
「研究成果報告書概要(和文)」より
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[Publications] S. Horie, R. Ishiwatari, SKadota, N. Yokoya, T. Ikawa, Y. Fujiwara, T. Yokoyama, K. Akai, S. Ueda, N. Nakai, M. Koyama and K. Ogura: S. Horie ed.: Self Publication. History of paleoenvironmental changes recorded in 1400 m long core drilled from the Lake Biwa., 217 (1986)
Description
「研究成果報告書概要(欧文)」より
