||After 1999 Chi-Chi earthquake, have many researcher study a lot of topics, but direct measurement the rock of changing of density and porosity of fault-zone rock are very rate. This research is with Taiwan Chelungpu-fault Drilling Project(TCDP) drilling C well of Takung (1050-1280 meters of depth include the drill core that is taken out of area with break of country rock in four major fault-zone ), use the precision type instrument through taking a sample intensively, and consult the experience of A well experiment , and every parameter is taken from with the position altering the sampling method ( bigger and cuts and takes a sample ), in order to reduce the error.|
Relieves and appear, the density of rock has obvious changes as the fault change, it is the density that is diminished to the fault centre gradually by the country rock, the porosity becomes great , heat-conductivity is diminished , but the speed of thermal diffusivity becomes large . Thermal-conductivity is average in 2.5W/m/K, increase as the density increases, and the change of the sandstone will be bigger than the shale. The thermal diffusivity is reduced averagely as the density increases, but the sandstone (1.72) is bigger than the shale (1.13).
The heat capacity calculated invites 700 J/kg/K more equally, the sandstone (625) is minimum, and the sandstone and shale (670) take second place, most greatly the shale (820).
The test of density and porosity to have height linear relations (R2 =0.9), And the sample reaches 104, prove this research approach is feasible, it is 2.8g/cm3 that sandstone has density of non-porosity, the sand and shale are 2.84g/cm3, the shale is 2.9g/cm3, the wet density of the whole host rock is in about 2.6 g/cm3. The whole porosity some host rock is under 10, the shale (9.5%) is bigger than the sandstone (7.5%), the characteristic of layer (8.3%) each other of sandstone and shale is between sandstone and shale.
This experiment finds place of 1178.7 meters of depth, there is high porosity up to 40% , and can rub with the hands into easily with the finger directly , the drill core displays too loosely on the appearance before cutting, so rational this fault-zone caused by 921 earthquakes of suspicion.
王乾盈 (2004) ，台灣車籠埔斷層深鑽計畫書(TCDP Project)，中央大學地球物理研究所。?
馬國鳳 (2004)，台灣車籠埔斷層深鑽計畫書(TCDP Project)，中央大學地球物理研究所。.
Brigaud, F. and G. Vasseur, 1989. Mineralogy, porosity and fluid control on thermal conductivity of sedimentary rocks. Geophysical Journal, 98, 525-542.
Douglas, W. W., W. S. Jacob, 2004. A Review and Evaluation of Specific Heat Capacities of Rocks, Minerals, and Subsurface Fluids.Part 1: Minerals and Nonporous Rocks Natural Resources Research, Vol. 13, No. 2, 97-122.
Flynn G. J., L. B. Moore and W. Klock, 1999. Density and Porosity of Stone Meteorites: Implications for the Density,Porosity, Cratering, and Collisional Disruption of Asteroids Icarus 142, 97–105.
Gustafsson, S. E., A. J. Hamdani, K. Ahmad, A. Maqsood, 1982, Transient Hot-Strip Method for Measuring Thermal Conductivity and Specific Heat of Solids and Fluids: Second-Order Theory Approximation for Short Time. J. Appl. Phys., 53, 6064-6068
Higgins, M. W., 1971. Cataclastic rocks. U.S. Geological Survey professional paper 687, 1-97.
Huang, S. T., J. C. Wu, J. H. Hung, and H. Tanaka, 2002. Studies of sedimentary facies, stratigraphy and deformation structures of the Chelungpu Fault zone on cores from drilled wells in Fengyuan and Nantou, central Taiwan. TAO, Vol. 13, No. 3, 253-278.
LaFehr, T. R., 1983. Rock density from borehole gravity surveys, geophysics. vol. 4x. no.3. 341-356.
Maqsood, A. , K. Kamran and I. Hussain, 2004. Prediction of thermal conductivity of granite rocks from porosity and density data at normal temperature and pressure: in situ thermal conductivity measurements. J. Phys. D: Appl. Phys. 37, 3396-3041.
Maqsood, M., M. Arshad, M. Zafarullah and A. Maqsood, 1996. Low-temperature thermal conductivity measurement apparatus:design assembly,calibration and measurement on (Y123, Bi2223) superconductors. Supercond. Sci. Technol. 9, 321-326. Printed in the UK.
McKenzie, D. and J. N. Brune , 1972. Melting on fault Planes During Large Earthquakes. Geophys. J. R. astr. Soc. 29, 65-78.
Menendez, B., C. David and M. Darot, 1999. A Study of Crack Network in Thermally and Mechanically Cracked Granite Samples using Confocal Scanning Laser Microscopy. Phys. Chem. Earth (A), Vol. 24, No.7, 627-632.
MiningLife Media, 2005. Rock Properties. Miner's Toolbox General Engineering. Http://www.mininglife.com/Miner/general/Density.html
Morrow, C. A. and D. A. Lockner, 2001. Hayward Fault Rocks: Porosity, Density, and Strength Measurements, .S. Geological Survey Open-File Report 01-421.
Sass J. H., 1992. Heat Flow From a Scientific Research Well at Cajon Pass, California. Journal of Geophysical research, Vol. 97, No. B4. 5017-5030.
Schulz, S. E., J. P. Evans, 1998. Spatial variability in microscopic deformation and composition of the Punchbowl fault, Southern California: implications for mechanisms, fluid-rock interaction, and fault morphology. Tectonophysics, Vol. 295, 223-244.
Shabbir, G., M. Maqsood, A. Maqsood, I. Haq, A. Amin, S. E. Gustafsson,1993. Thermophysical Properties of Rock Marbles as a Function of Temperature. J. Phys. D: Appl. Phys. 26, 1576-1580
Sibson, R.H., 1977. Fault rocks and fault mechanisms: Journal of the Geological Society of London, Vol. 133, 191-213.
Tanaka, H., 1992. Cataclastic lineations. Journal of Structural Geology, Vol. 14, No. 10, 1239-1252.
Tanaka, H., K. Fujimoto, T. Ohtani, and H. Ito, 2001. Structural and chemical characterization of shear zones in the freshly activated Nohima fault, Awaji Island, southwest Japan. Journal of Geophysical Research, Vol. 106, No. B5, 8789-8810.
Tanaka, H., C.Y. Wang, W.M. Chen, K. Ujiie, H. Ito, and M. Ando, 2002. Initial science report of shallow drilling penetrating into Chelungpu fault zone, Taiwan. TAO, Vol. 13, No. 2, 227-251.
Tanaka, H.,W. M. Chen, Jim Mori, C.Y. Wang, K. Kawabata, N. Urata, C. B. Lu, H. J. Huang, T. J. Kuo, C. H. Chen, W. C. Lu, 2006. Direct measurement of thermal transport properties across the active fault zone and its implication to frictional heating during faulting, 2006 Annual Meeting of Geological Society Located in Miaoli, Abstract, 99.
Wang, Y. C., H. Tanaka, , G. D. Chou, , C. C. Chen, and J. H. Hung, 2002. Shallow reflection seismics aiding geological drilling into the Chelungpu Fault after the 1999 Chi-chi earthquake, Taiwan. TAO, Vol. 13, No. 2, 153-170.