碩士 / 國立成功大學 / 地球科學系 / 84 / ABSTRACTBy the interpretation of aerial photos and SLAR Image,
field work, statistical analysis of fracture attitude and fault-
slip data, we try to understand the characteristics of
geological structures in the northern Coastal Range, and
compare with the data in the middle part of Coastal Range, to
provide a reasonable information about the progress of
geological structures in the Coastal Range.Alccording to the
observation of deformation in the outcrop, fault-slip data and
Bouguer gravity map of eastern Taiwan, it shows that the igneous
rocks on the north of Fengpin are not volcanic arcs but huge
blocks slumping from volcanic arcs during the arc-continent
cillision. The result of field work indicates that relay array
folds in sedimentary rock are the dominant structures in the
northern Coastal Range, it is different from imbrecated thrusts
in the middle part of Coastal Range.The major reason which makes
a difference between the north and middle part of Coastal Range
in structural styles the tectonic setting of sedimentary basins.
The results of fault-slip data analysis indicate that the
northern Coastal Range is dominanted by the thrust-type stress
state and the directions of the maximum compressive stress
{symbol 115 \f "Symbol" \s 14|}1 are between 110{symbol 176 \f
"Symbol" \s 14|} and 150{symbol 176 \f "Symbol" \s 14|}.
According to the structural styles and its geometry, geological
structures of the northern Coastal Range reflect pure shear
strain condition caused by plate collision rather than simple
shear strain condition caused by strike-slip movement of the
Longitudinal Valley Fault.The Chimei Fault which is the major
thrust in the northern Coastal Range exhibites different
characteristics in segments with variant orientations. For
segments with orientation parallel or subparallel to the
Longitudinal Valley Fault, the characteristic of strike-slip
movement is more significant. The development of the Chimei
Fault can divide into three stages. The early stage of arc-
continent collision behaved the type of strike-slip fault, and
then, along the pre-existing strp fault plane, continuously
development thrust which was due to horizontal compression
during the collision event. Finally, as the north part of
Coastal Range had been closed, the Chimei Fault transformed into
mostly the behavior of strike-slip fault, and partly with
thrusting movement.
| Identifer | oai:union.ndltd.org:TW/084NCKU0135013 |
| Date | January 1996 |
| Creators | Cheng, Weng-Hong, 鄭文弘 |
| Contributors | Lin Ching-Weei, 林慶偉 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 156 |
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