| dc.description.abstract | ABSTRACT
The 1999. 9.21 Chi-Chi earthquake, triggered by Chelungpu Fault, led to a tremendous life and property loss in Taiwan, also aroused the attention to tectonic structures and fault activity. The plant remains in sedimentary strata gradually decompose and rearrange their organic molecules after deep burial, diagenesis, and tectonic activities. In other words, the plant macerals turn to be more matured out of the increasing temperature and pressure during thermal maturation. Furthermore, the maturation process is irreversible, not influenced by retrograde metamorphism, can only record the maximum thermal event in the burial history. Vitrinite reflectance had been proved to reflect this thermal/pressure information successfully.
The drilling work of TCDP (Taiwan Chelungpu-fault Drilling Project) core was completed on December, 2004. Core over 1500m in length was successfully recovered from –500m down to –2000m. Black carbonaceous materials were collected from this core for the purpose of evaluating thermal mechanism in the well site, especially at the fracture zones of Chelungpu Fault. The purpose of this study is to evaluate the thermal mechanism of fault zone by vitrinite reflectance. According to the study result, there is no obvious increase of vitrinite reflectance from surface to the depth of 2000m in TCDP core. It can be attributed to the reasons of 1) Chelungpu Fault did not deep-cut the strata to produce enough heat, or 2) sample positions were not close enough to the fault position. | en_US |