海洋鑽探計畫─(子計畫五)台灣東部海域地殼構造的地球物理研究
Date Issued
1999
Date
1999
Author(s)
DOI
882611M002024ODP
Abstract
This research project investigates the
crustal structures and tectonic features in the
area offshore eastern Taiwan for the purposes
of providing basic geological and tectonic
framework for the Taiwan ocean drilling
proposal, as well as to provide observational
constraints on the geometry of the plate
boundary between the Philippine Sea and
Eurasia plates along the Taiwan
subduction-collision zone. This report
summarizes the results of the 2nd year study.
During this year, main efforts were devoted
on compiling and analyzing the geophysical
data (especially the bathymetry and seismic
reflection data) acquired previously, and
scientific results on four different topics have
been presented.
A 500-m gridded digital bathymetric data
set has been compiled that reveals details of
the seafloor topography around Taiwan. The
relationships between the bathymetric
features and their tectonic implications have
been discussed.
For the study offshore eastern Taiwan,
two papers have been published. One
2
discusses the kinematic movements of the
southern Ryukyu Arc relative to Taiwan, and
presents their geodynamic implications; the
other paper reveals trench-parallel stretching
and folding of the Ryukyu forearc basins due
to oblique convergence of the plate motion.
The last paper focused on the
deformation of the Philippine Sea plate in the
Taiwan collision zone, and proposes two
possible mechanisms to accommodate the
*subduction on one side and collision on the
other side* geometry of the Philippine Sea
plate.
Subjects
Digital bathymetric data
Ryukyu subduction - Taiwan collision system
Forearc basin structure
Huatung Basin
Publisher
臺北市：國立臺灣大學海洋研究所
Type
report
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