Structural Controls of the Taitung Canyon in the Huatung Basin East of Taiwan

臺灣東部海域花東海盆中臺東峽谷的構造控制

Philippe Schnürle ； 劉家瑄(Char-Shine Liu) ； Serge E. Lallemand ； Donald Reed

《Terrestrial, Atmospheric and Oceanic Sciences》 9卷3期 (1998/09) Pp. 453-472

並列摘要

P-wave velocities of the uppermost mantle beneath the Taiwan Strait,based on the travel-time observations at Kinman,are determined from Pnarrivals of regional earthquakes.Based on the accurate locations and origin times of shallow earthquakes beneath Taiwan and its eastern offshoreregion,the uppermost mantle velocities of the Taiwan Strait are determinedusing seismic waves recorded by stations in the Strait.This study indicatesthat the average Pn velocities beneath the Taiwan Strait,the island of Taiwan and its eastern offshore region are 8.2±0.2 km/sec,7.9±0.1 km/secand 8.0±0.1 km/sec,respectively.The uppermost mantle velocity determined for the Taiwan Strait improves the epicentral determination of earthquakes on the Strait.The Moho depth beneath the western side of the Taiwan Strait is estimated to be shallower than those beneath both the easternside of the Strait and Taiwan Island.From this data set,the Pn velocitiesbeneath the Strait regions are slightly greater than those of the island area,and the Moho dips slightly from west to east.The crust of the Taiwan Straitarea could be considered as a part of the Eurasian continent and as havingbeen slightly deformed due to the arc-continental collision in the Taiwanregion.

並列關鍵字

Submarine Canyon ； Seismic Reflection Profiles ； Huatung Basin ； Taiwan