台灣地震地質研究-台灣西南部活斷層研究─台灣西南部活動斷層之長期滑移速率及其相關之構造地形
Other Title
Long-term Slip Rates of the Active Faults and their Related
Morphotectonics, Southwestern Taiwan
Morphotectonics, Southwestern Taiwan
Date Issued
2005
Date
2005
Author(s)
DOI
922116M002023
Abstract
This project will collaborate with the other
principal investigators to work on the neotectonics of
southwestern Taiwan. There are 42 active faults have
been identified by Central Geological Survey, ROC.
Except for the Chelungpu fault, the 1999 earthquake
fault, we only have insufficient information on the
others. Based on the Chi-Chi experience, this project
aims to find out the potential earthquake faults located
in the proposed area. Hopefully, we can understand
more and prepare well before next disaster coming.
The methods of Geomorphology, Trenching,
and Geochronology will be adopted in this project.
First of all, the GIS software and 40m DEM of
Taiwan will be used to roughly divide the neotectonic
domains by the abundance of tectonic features. The
high priority domain will further be studied by high
resolution DEM (<5m), produced by aerial photos and
high-resolution satellite imagery (Inokos or
QuickBird). The result will provide precise tectonic
features that can be linked to active faults. Following
the above results, we therefore can make better
decision to find the trenching sites along the high
potential seismogenic faults. Paleoseismology study
(trenching) will be then conducted to retrieve the
relevant information with respect to the paleo-events.
For the purpose of computing the recurrence interval,
dating methods of radiocarbon, optical stimulated
luminescence (OSL), and thermoluminescence (TL)
are used to build up the time frame. The dating
methods can also be applied to the river terraces and
tablelands in the surrounding area to derive the
long-term slip rates of the active structures, which is
of great importance in evaluating the current situation
of the active faults.
This project plans four years to accomplish the
goals: 1) evaluation of characteristics and recurrence
intervals on all reported active faults; 2) improve the
dating techniques.
Subjects
neotectonic activity
geographic information system (GIS)
digital
elevation model (DEM)
elevation model (DEM)
trench, 14 C
dating
dating
optically stimulated
luminescence dating (OSL)
luminescence dating (OSL)
thermoluminescence dating (TL)
Publisher
臺北市：國立臺灣大學地質科學系暨研究所
Type
report
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