台西盆地新生代构造的演化

CENOZOIC TECTONIC EVOLUTION IN TAIXI BASIN

于1986－1991年，应用地震地质方法，对台湾海峡的地震地层和地质构造进行调查。采用地震剖面资料，结合区域地质特征，对台西盆地的构造演化进行研究。认为该盆地由厦澎坳陷、乌丘屿坳陷、新竹坳陷和台湾坳陷等组成。其构造演化经历了中生代末－中始新世初始张裂、晚始新世－渐新世全面张裂、中新世构造调整，以及中新世末以来挤压－收缩－封闭等阶段，现今已成为残留陆缘裂谷盆地，是陆缘裂谷从产生到衰亡的一个典型实例。

Seismic stratigraphy and geology structure in Taiwan Strait were re-searched in 1986-1991 by using the method of seismic geology. The tectonic evolu-tion of Taiki Basin is studied in this paper by utilizing the information of seismicprofiles and combining with the regional gCologic characters. It is suggested that Taikihasin is composed of Xiapeng Depression, Wuqiuyu Depression, Xinzhu Depressionand Taiwan Depression, and so on. Its tectonic evolution had undergone four stapes,that is, first spreading stage in the end of Mesozoic - Middle Eocene; secondspreading stage in Inte Eocene- Oligocene; tectonic readjustment stage in Miocene;and compression- closed stage since the end of Mierene. It has become a remainedcontinelltal rift basin now, and is a typical example of continental rift. fromgenrating to dying.