【摘 要】
：
统计分析了2000-2002年间的中国5级以上地震氡异常.本底呈现出三种形态,稳定型、趋势型和组合型.均值本底在4-560Bq/L之间,大多数低于50Bq/L.异常具有渐变、突变和叠加形态.7
【机 构】
：
西北核技术研究所,西安710024
论文部分内容阅读
统计分析了2000-2002年间的中国5级以上地震氡异常.本底呈现出三种形态,稳定型、趋势型和组合型.均值本底在4-560Bq/L之间,大多数低于50Bq/L.异常具有渐变、突变和叠加形态.75％的台站的变化率在-50％至150％之间,67％的台站以正异常形式出现,近区异常远高于远处异常,200公里范围内的异常站占总数的80％.异常通常出现在靠近震中的某些构造发育地区,越靠近震中异常越大.震前异常出现的时间范围很宽,长者接近两年,短者仅有几天.对于6级强地震,水氡异常面积达数万平方公里.
其他文献
Natural gas hydrates are increasingly problematic in todays petroleum industry as new technology drives the commercialization of reservoirs with progressively e
In this paper,a nanofocus X-ray computed tomography(X-CT) imaging system is used to observe the methane gas hydrate behavior in porous media.A series of experim
The molecular mechanism of clathrate hydrate formation remains poorly understood.The challenges associated with describing clathrate hydrate nucleation and grow
The fluorescent properties of dissolved organic matter (DOM) from groundwater in the coastal Jiaozhou Bay watershed,North China were determined using excitation
More and more attention has been attracted on hydrates formation and dissociation,since the hydrates plug occurs during the drilling,production and transportati
Molecular-dynamics simulations and first-principles calculations are employed to understand the vibrational spectroscopy and the molecular and electronic struct
210Pb-210Po disequilibrium was applied to estimate the particulate dynamics in the euphotic zone of East China Sea during the autumn 2011.210Po and 210Pb (both
为研究厦门地区不同粒径颗粒物中水溶性离子的来源及海盐气溶胶对海滨城市大气颗粒物的影响,利用六级大流量MOUDI 碰撞采样器于2012.4.1-10,2013.4,2013.7 及2013.11.17-21
为了在海量数据中挖掘与工程选址相关联的指标因子,提高海量数据的利用率和选址精度,提出了一种基于数据挖掘技术的工程选址模型,该模型通过决策树算法可实现工程选址中多元
Nitrogen is essential element for all the life and the availability of nitrogen limits biological production in much of the world ocean.In north basin of South