Regional scale rifting and subsidence in the vicinity of Iheya-Minor Ridge, the middle Okinawa Trough: Cruise results of KM17-12C

Hidenori Kumagai; Kazuya Kitada; Ayu Takahashi

doi:10.5918/jamstecr.27.68

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Regional scale rifting and subsidence in the vicinity of Iheya-Minor Ridge, the middle Okinawa Trough: Cruise results of KM17-12C

Hidenori Kumagai, Kazuya Kitada, Ayu Takahashi

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Keywords: Sub-Bottom Profiling, layered sedimentation, subsidence, intrusion, possible folding

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2018 Volume 27 Pages 68-76

DOI https://doi.org/10.5918/jamstecr.27.68

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Abstract

Shallow sub-seafloor structure in the vicinity of Iheya-Minor Ridge was acquired using Sub-Bottom Profiler equipped on R/V Kaimei in KM17-12C cruise. Normal faults and downward warping stratification indicate regional subsidence of the studied area. The profiles also suggest local-scale compression folds that may associate with the intrusive volcanism of the ridge.

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