以 TAIGER 資料推求北部之速度構造剖面

Modeling the Northern Taiwan velocity structure by TAIGER data

Bor-Kuan Li

Abstract

Taiwan is located on the converging boundary of Eurasian and Philippine Sea plates, it is one of the most rapidly uplifting orogeny in the world. In this study, we attempt to describe the Moho depth beneath Taiwan by using amount of data from the project of Taiwan Integrated Geodynamic Research(TAIGER),and expect for the results can make some improvements to the construction of tectonic collision patterns of Taiwan orgoeny.

In this study, we handle the data along the W-E transects of northern Taiwan (T6), and simulate the velocity structure model from the first arrival time and more obvious reflections of these data by Ray-tracing method. The preliminary results are as follows:1) It is a standard layered structure beneath western Taiwan and the thickness of crust is 37 kilometers; 2) The crust thickens and becomes more than 40 kilometers in the mountain area,; 3) The structure beneath Hsuehshan Range and Central Mountain Range are different; 4) The depth of Li-shan fault as a boundary faults can reach about 20 kilometers.

References

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Zelt, C. A., and D. A. Forsyth, Modeling wide-angle seismic data for crustal structure: southeastern Grenville Province . J. Geophys. Res.,89,11687-11704, 1994.

郭耀文， 利用波線追跡法探討台灣莫荷面深度，中央大學地球物理研究所碩士論文， 2010 。