| dc.description.abstract | Past study about magnetic and biostratigraphy from planktonic foraminifera and calcareous fossils of Baliwan formation and Fanshuliao formation in the Madagida-chi area and determined the stratigraphic age is the Pliocene-Pleistocene with rapid deposition. The profile spanned from 3.4 Ma to 1.2 Ma with a long time missing hiatus starting from 2.92Ma to 2.1Ma. On the other hand, the study of Sanxian-chi area determined the age is from 1.69Ma to 0.7Ma .However, in sedimentary rocks had not been thoroughly studied. This study combines the analysis of organic matter with previous inorganic studies so as examine the depositional environment of stratum units in the southern Coastal Range of Taiwan. Rock-Eval pyrolysis is used for maturity and characteristics of organic matters. Then, X-ray Diffraction analysis (XRD) is used to detect mineral composition especially clay minerals. In Madagida-chi area, the deeper Fanshuliao Formation exhibits Ro values from 0.5 to 0.8%, whereas the shallower Baliwan Formation exhibits Ro value from 0.8 to 1.2%. Tmax of both formations have a similar value about 430 °C. On the other hand, outcrops of Sanxian-chi belong to Baliwan Formation, the data can be divided into two groups：1) Ro value 0.8 to 1%, and Tmax is 430 ℃, a matured organic material. 2) Ro 0.3% and Tmax is about 370, an immature organic materials. Additionally from Ro of carbonized wood, it can be seen that the mature organic material of Bailiwan Formation should be allochthonous origin, whereas the immature organic material should be autochthonous material. XRD analysis was further performed to confirm possible sources of the material. According to results of XRD, most of samples from Madagida-chi contain illite, quartz and calcite. Because the signal of quartz is so strong that will influence the signal of other clay minerals, chemical method was performed to remove the salt, carbonate and quartz, before analyzing clay mineral composition. Finally the results of petrographic analysis are compare with the results of XRD, it confirmed that the metamorphic material from Central Mountain Range had been included in Baliwan Formation. | en_US |