海洋鑽探計畫─子計畫九：南沖繩海槽海洋鑽探計畫井位的震測調查
Date Issued
2001
Date
2001
Author(s)
DOI
892611M002047ODP
Abstract
This project is a sub-project of the ODP
integrated project, and also is a
Taiwan-France cooperative research project.
The purpose of this study is to understand the
crustal structure and volcanic activities in the
Southern Okinawa Trough (SOT). To support
the ODP drilling proposal submitted by
several scientists (including the author of this
report) to drill in the SOT, seismic reflection
profiles have been provided to the Site
Survey Panel of the ODP. The proposed site
has since been successfully drilled in late
April of 2001 (ODP site 1202). Due to the
strong interests in the volcanic and
hydrothermal activities found in the studied
area, the focus of this study thus has been
shifted to identify the volcanic bodies and
their distribution in the SOT.
3
From seismic reflection profile analyses,
we have divided the SOT into six structural
provinces, namely the East China Sea shelf,
the half graben shelf belt, the basins, the
central volcanic high, the Ryukyu arc half
graben belt, and the Ryukyu arc high.
Magnetic anomaly patterns are used to
confirm the volcanic bodies observed on the
seismic reflection profiles, while high
frequency magnetic anomaly map provides
the areal distribution of the volcanic bodies.
This study shows that volcanic bodies (both
intrusion and extrusion) distribute widely in
the SOT, and especially concentrated in the
central volcanic high.
Subjects
Southern Okinawa Trough
Seismic Reflection
Magnetic Anomaly
Volcanic Activities
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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892611M002047ODP.pdf
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