The kinetics of silica-water reactions
Chen Chein-Hong
Abstract
The fault zone gouge sample of Taiwan Chelungpu-fault Drilling Project (TCDP) is about 12 cm, and we only analyze the 2 cm. This sample brings us a lot of questions to think.
For example, according to heat function, the fracture energy is not the same as our calculations. It is only half of all. Besides, the small grain size is not irregular anymore, it is closed to sphere. It doesnˇ¦t like the reason by nature fracture.
So, we think the answers are linking to the missing energy.? Here, we choice the rate model of silica, because it is more than 60% on Earth. We made the experiment to get the data of precipitation, dissolution and saturation.
SiO2(s) + 2H2O(l) ? H4SiO4(aq)
When silica-water reacts, it must concern to the heat and energy. We think maybe this is the key to help us to find the missing energy of fracture.
References
J. D. Rimstidt, and H. L. Barnes(1980), The kinetics of silica-water reactions, Geochemical, vol. 44, 1683-1699.
Jane F. Bertone, Joel Cizeron, Rajeev K. Wahi, Joan K. Bosworth, and Vicki L. Colvin(2003), Hydrothermal synthesis of quartz nanocrystals, Nano Letters, vol. 3, No.5, 655-659.
Kuo-Fong Ma, Hidemi Tanaka, Sheng-Rong Song, Chien-Ying Wang, Jih-Hao Hung, Yi-Ben Tsai, Jim Mori, Yen-Fang Song, Eh-Chao Yeh, Wonn Soh, Hiroki Sone, Li-Wei Kuo, and Hung-Yu Wu(2006), Slip zone and energetics of a large earthquake from the Taiwan Chelungpu-fault Drilling Project, Nature, vol. 444, 473-476.