活断層変位地形と推定地下構造

概要

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If vertical deformation has not been accumulated, seismic reflection profiles are not indicative of active structure. Deformed landforms are indispensable for detecting recent crustal movement. We should understand tectonic landforms to make sure we have not missed any active fault out. Even though reflection seismic records show clear geological structures, we have to check them for contradiction to the geomorphologic characteristics. Wide discrepancies can lead the discussion into unreal issue. Both geophysical prospecting and geomorphic investigation are useful for studying active tectonics. However, prospected records do not always coincide with surface data. The latter takes precedence over the former, in clarifying the active tectonics. This is an important stance not only on studying geomorphic development but also on examining how to reduce seismic hazard. Tectonic landforms are simple but highly effective subjects of structural geology and paleo-seismology. Geomorphologist had better expand their research in these close fields of geo-sciences, which allows tectonic geomorphology to progress.
地理科学学会の論文
2005-07-28