电测深法在漠河地区探测永久冻土层的应用

The Application and Effect of Using Electrical Sounding Method to Explore Ever Frozen Layer in Mohe Region

用电测深方法研究永久冻土带的空间分布规律,为东北天然气水合物远景调查的进一步研究提供依据。通过在漠河地区南北剖面(20 km)和东西剖面(13 km)电阻率测深法的探测研究,实测电测深曲线多数为HK、K或Q型,对应的地电结构大致为:第一层为地表干燥松散碎石层,该层电阻率很高(几百~几千Ω.m),但厚度较小,一般不超过2 m;第二层为无冰冻含水碎石堆积层(部分测点无此层),电阻率一般小于100Ω.m,厚度不超过2~5 m;第三层为推断的永久冻层,电阻率一般大于300Ω.m,该层厚度变化较大,从20几m到100多m;推断永冻层下为一低阻层,电阻率一般小于200Ω.m。

Using the electrical sounding method to study the space distribution regularity of the ever frozen layer,it offers the base for the further research of the northeast natural gas hydrate prospective investigation.By the exploration and study of electrical sounding method in south-north section(20 km) and east-west section(13 km) of Mohe region,the type of the actual measurement electrical sounding curve is most HK?K and Q,and the corresponding earth current structure is approximate following case: The first ...