【摘要】 水合物稳定带 (HSZ)的研究对天然气水合物的成矿与分布规律以及资源评价研究都具有重要的指导意义。文章根据天然气水合物的相平衡条件和相应的压力_温度方程 ,参照有关的几何算法 ,讨论了海底天然气水合物稳定带厚度的理论计算方法。并根据稳定带厚度的理论计算方法 ,在Windows中文平台上编制了简单实用的程序。利用该程序对冲绳海槽水合物稳定带的厚度进行了计算 ,并讨论了冲绳海槽水合物稳定带厚度的分布特征更多还原

【Abstract】 The study of the hydrate stability zone (HSZ) is of great significance in that it is beneficial to the research of the deposition and the distribution features of marine gas hydrate ore, and also to the resource assessment of the marine gas hydrate. Based on the phase balance condition and the corresponding pressure_temperature equation of the gas hydrate, this paper has discussed the effects of such factors as the water depth, seafloor temperature and geothermal gradient on the deposition of marine gas hydrate. According to the relative geometric algorithm, it has also dealt with the theoretical computation method for the thickness of the hydrate stability zone based on the parameters of the water depth, seafloor temperature and geothermal gradient. A simple and practical program was worked out on the Windows Chinese platform according to the available computation method. Furthermore, this paper has analyzed the geological characteristics of Okinawa Trough, considering that Okinawa Trough has favorable mineralization condition for marine gas hydrate. So based on the specific parameters such as the water depth, seafloor temperature and geothermal gradient of Okinawa Trough, the authors used the program to compute the thickness of the hydrate stability zone in Okinawa Trough. The calculated results show that the Okinawa Trough, especially its west slope, is the potential area of the gas hydrate resource.更多还原