HR: 0800h
AN: T51A-1331    [Abstracts]
TI: Microfossil Analysis of wells in the Chelungpu Fault Zone TAIWAN
AU: * Wu, J
EM: 048704@cpc.com.tw
AF: Chinese Petroleum Corporation, 1 Ta Yuan, Wen Shan, Miaoli, 36010 Taiwan
AU: * Wu, J
EM: 048704@cpc.com.tw
AF: National Taiwan Normal University, No. 162, HoPing E. Road, Sec.1, Taipei, 106 Taiwan
AU: Huang, S
EM: 048461@cpc.com.tw
AF: Chinese Petroleum Corporation, 1 Ta Yuan, Wen Shan, Miaoli, 36010 Taiwan
AU: Wang, M
EM: 141925@cpc.com.tw
AF: Chinese Petroleum Corporation, 1 Ta Yuan, Wen Shan, Miaoli, 36010 Taiwan
AU: Tsai, C
EM: 338087@cpc.com.tw
AF: Chinese Petroleum Corporation, 1 Ta Yuan, Wen Shan, Miaoli, 36010 Taiwan
AU: Mei, W
EM: 046001@cpc.com.tw
AF: Chinese Petroleum Corporation, 1 Ta Yuan, Wen Shan, Miaoli, 36010 Taiwan
AU: Hung, J
EM: jhung@earth.ncu.edu.tw
AF: National Central University, No.300, Jhongda Rd, Jhongli, 32001 Taiwan
AU: Lee, T
EM:
AF: National Taiwan Normal University, No. 162, HoPing E. Road, Sec.1, Taipei, 106 Taiwan
AU: Yang, K
EM:
AF: Chinese Petroleum Corporation, 1 Ta Yuan, Wen Shan, Miaoli, 36010 Taiwan
AB: The TCDP-A well will face the fine grain muddy sandstone or mudstone dominated formations of the Pliocene and Pleistocene in the Taichung area.The purpose of this study is how to make good core preservation and establish the nannofossil biostratigraphy within the integrated Taiwan Chelungpu Fault Drilling Project (TCDP), Over 400 meters subsurface cores have been resinned and slabbed, and all the core fabrics are also digitized. More than 150 rock samples have been analysized for nannofossils and constrained a detail biostrtigraphic column on TCDP-A well. The fossil zone of the depth interval 431-869 is NN16-18 which is equivalent to the Cholan formation, a lithologic stratigraphy in the northern and central Taiwan; Interval 883-1226 meter is NN15 which is equivalent to the Chinshui Shale. The Chelungpu fault is composed of five major shear zones which are all happened on the depth interval of the marine Chinshui Shale. Interval 1293.37 -1710 meter is NN12-14, equivalent to the Kueichulin Formation. Interval beneath 1714 meter of the TCDP-A well is NN16-18 (Cholan Formation) and Nannofossil zone near the well bottom is NN16-18, expressed the repeated Cholan Formation. The lowest fossil zone is also abundant of secondary reworked fossils in its assemblages. This study also reveals the fact that the repetition of younger fossil zone NN16-18 at the bottom of the well verifies the subsurface position of Sanyi fault and this well has possibly penetrated through the Sanyi Fault. Additionally, in the previous study, related samples from BH1-BBH1A & CLF-2 boreholes fall in the range of NN14-NN15(Matini fossil zone, Martini 1971), which is upper Early Pliocene in age and equivalent to the Yutenping sandstone Member and the Chinshui shale along the Holung-Chi sections of Miaoli area, northern Taiwan. The boundary between the Chinshui Shale and the Kueichulin Formation in BH-1 borehole is located at 210.5-225.6m based on the distribution richness of nannofossil Peak variation on nannofossil content in the BH-1A borehole probably originated from the change of parasequence between different delta systems within the Yutenping Sandstone. The boundary between the Chinshui and the Kueichulin Formation is also necessarily judged by lithofacies and sedimentary facies (Huang et al., 2002). Nannofossil columns from these nearby two well would also provide good correlation to those of the TCDP-A well.
DE: 7230 Seismicity and tectonics (1207, 1217, 1240, 1242)
DE: 8010 Fractures and faults
DE: 8102 Continental contractional orogenic belts and inversion tectonics
DE: 8150 Plate boundary: general (3040)
SC: Tectonophysics [T]
MN: Fall Meeting 2005