We present new, high-resolution seismic reflection data (2005 Nishi-Nojiri profile) acquired across the forelimb of the Suzuka basement-involved fold and Ichinohara flexure to further image their subsurface geometries. A seismic source (mini-vibrator) and 180-channel digital telemetry recording system were used in an off-end configuration with the nearest receiver adjacent to the source to record seismic waves from deeper reflection points. A 10-m source and geophone spacing give a 5-m CMP (common midpoint) spacing on the final section. The nominal CMP stacking fold had 90 traces. We also suppressed coherent noise by repeating source points 5 times. After data processing including surface-consistent statics, velocity analysis, normal moveout (NMO) correction, residual statics, CMP stack, and migration, the section was finally depth-converted using stacking velocities. Reflectors imaged on the seismic profile Illuminate that the forelimb composed of Pliocene-Pleistocene Tokai Group and underlying Mesozoic basement rocks are thrust over the Tokai Group in the footwall.
雑誌名
地震研究所彙報
巻
82
号
1
ページ
85 - 93
発行年
2007
ISSN
00408972
書誌レコードID
AN00162258
フォーマット
application/pdf
日本十進分類法
051.1
出版者
地震研究所
出版者別名
Earthquake Research Institute, University of Tokyo
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鈴鹿山地東縁断層のP波浅層反射法地震探査 : 2005年西野尻測線
IHO82110.pdf
(6.58MB)
