High-Resolution Seismic Reflection Profiling Across the Western Marginal Faults of the Kitakami Lowland in Hanamaki Area, Eastern Margin of Ou Back-bone Range, Northeast Honshu, Japan

Abstract

The western marginal faults of the Kitakami Lowland are active faults along the eastern rim of the Ou Back-bone Range, northeast Honshu, Japan. To reveal the relationship between geomorphic and geological structures, high-resolution seismic reflection profiling was performed across the faults. The seismic source was a mini-vibrator, and seismic data were obtained by a digital telemetry system. Source and receiver intervals are 20m and 10m, respectively. The resultant depth-converted seismic section shows the flexural structure of the uppermost Miocene to middle Pleistocene strata above the faults and the youngest strata overlying the structure with oblique unconformity