| Project/Area Number |
11793001
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| Research Category |
Grant-in-Aid for University and Society Collaboration
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Kobe University |
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Principal Investigator |
TAINOSHO Yoshiaki Kobe University, Human Development, Professor, 発達科学部, 教授 (90030585)
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| Co-Investigator(Kenkyū-buntansha) |
UMEMOTO Satoshi Hyogo Prefecture Institute of Environmental Science, Chief research worker, 主任研究官
KOMAI Yukio Hyogo Prefecture Institute of Environmental Science, Chief research worker, 主任研究官
MIYATA Takao Kobe University, Sciences, Professor, 理学部, 教授 (00107989)
SAKIYAMA Toru Museum of Nature and Human Activities, Associate Professor, 自然環境科学研究所,人と自然の博物館(兼任), 助教授 (20244692)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | slope failure / chemical composition / clay vein / Hyogoken-Nanbu Earthquake / weathering / prevention of disaster / 六甲山 / 急傾斜地崩壊危険区域 / 岩石の化学組成 / 斜面崩壊機構 / 分析電子顕微鏡 / 花崗岩の風化作用 / 崩壊機構 / 元素逸脱 / 岩石の分析 |
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| Research Abstract |
Many steep slopes were heavy damaged by the Hyogoken-Nanbu Earthquake. The steep slopes in Kobe district has been so strongly by the fault and been weathered deeply. The collapse has been spread during the rainfalls. The reason for the slope failure concentration is thought to be heavy crushed and weathering in this area. The element are leached from the rocks during the wethering process of the slope failure. MgO, Cao and Feo contents in the rocks are remarkably decrease during the process. Leaching of these elements is remarkable in biotite, because the biotite alters in the presence of water to vermiculite and kaolinite. Chemical composition of the rocks are in the slope reflect to weathering grade. Thus, chemical composition are useful for prevention of the slope failures. The slope failures appear to be concentrated along the vein. The granitic rocks of the slopes are thought to be alteration to clay minerals at hydrothermal. Biotite in granitic rocks is easily weathered and alters in the presence of water to clay minerals. There is a close relation between slope failure and the vein in the granitic slopes.
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