Sediment Distribution and Canyon Evolution of the Lower Section Kaoping Submarine Canyon, Offshore South West Taiwan
Date Issued
2014
Date
2014
Author(s)
Su, Alex Chih-Hsuan
Abstract
The Kaoping Submarine Canyon offshore southwestern Taiwan has been widely studied, however, the submarine fan distribution and the cause of canyon meandering of the Kaoping Submarine Canyon lower section are still unclear. The purposes of this study are to investigate the sediment distribution of the submarine fan and to develop a model for canyon meandering process.
In this study, multi-channel seismic reflection data are analyzed by using the “Sequence analysis” approach. The submarine fan sediment can be classified into 3 types: “channel deposits”, “overbanking deposits”, and “Canyon thalweg”. We have identified 4 deposition stages from seismic sequence analysis. The active stages of Fold R3.4, Fold A, and Fold B have all affected the development of the submarine fan. Further with analyzing the paleo-canyon and paleo-channle on the seismic profiles, evolution of the canyon and channel has been established in this study.
Sediments has been transported from land to deep sea and deposited at lower section Kaoping Submarine Canyon. Two slope basins confine the overbanking sediments. Canyon is meandering due to the activities of Folding. Therefore, the shape of submarine fan is different from general cases.
Subjects
海底扇
高屏海底峽谷
震測剖面解釋
台灣西南海域
SDGs
Type
thesis
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ntu-103-R99224104-1.pdf
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