辽宁省复州西南部张夏组上段高频率旋回地层及复合海平面变化

HERCYNIAN GNEISSIC GRANITE AT CHIPAN, HUALIEN COUNTY, TAIWAN PROVINCE

该区张夏组沉积地层记录旋回性明显，反映高频旋回的特点，共划分１个三级旋回层序、４个四级旋回层序、１４个五级旋回层序和５８个六级（米级）旋回层序。各级别旋回层序均由相应的次一级旋回层序向上变浅、变粗、变厚的序列组成，其底部均以相应级别的加深—间断面为界。四级旋回层序具有区域地层对比意义。该时期的海平面具有高频率振荡特点，为一个复合海平面变化旋回。

The Kainankang Formation or Kainankang gneiss in regional metamorphic rocks of the Tananao Group in eastern Taiwan Province is considered as the horizon of this group. The Chipan gneiss is a typical component of the Kainankang gneiss. There is much dispute over its protolith, origin and age. The protolith of the Chipan gneiss should be monzogranite and the formation ages of crystalline zircon are (259±6) Ma, (1 295±8) Ma and (1 589±8) Ma respectively. According to these ages combined with the macroscopic geological features, the age of the rock body is considered to be Permian, and again according to the polymictic conglomerate of the Chihuichiao in the Tailuku area, it is inferred that there existed the Hercynian Dongwu movement in eastern Taiwan.