| Taiwan is a tectonic active province where the Philippine Sea Plate is on-going to
collide with the Eurasian plate and to subside beneath it at the northeastern Taiwan.
Climatically, Taiwan is also very sensitive for the East Asia Monsoon system. So,
the variation of the lake sediment depositions was undoubted controlled by both
factors.
In this study, magnetic proxies of sediments from three lakes in the surrounding area of
Ilan Plan (two at north and one at south) at northeastern Taiwan were analyzed. The main
purpose tries to identify the major factor affected the deposition at different time interval for
the last 1200 years. The results indicated that the wet-dry variation seems to have about 150
year period. The most controlled factor is precipitation. However, active tectonic events might
happen around 160 yrB.P., 500 yrB.P. at the south and 1000 yrB.P. at the north of the Ilan
Plan. |