瞬变电磁法(TEM)在多年冻土区的应用研究  

Geophysical Mapping of Permafrost Using TEM

作　　者：王武[1] 赵林[1] 刘广岳[1] 俞祁浩[2] 盛煜[2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室青藏高原冰冻圈观测研究站,甘肃兰州730000 [2]中国科学院寒区旱区环境与工程研究所冻土工程国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2011年第1期156-163,共8页Journal of Glaciology and Geocryology

基　　金：科技部国家科技基础性工作专项"青藏高原多年冻土本底调查"(2008FY110200)资助

摘　　要：多年冻土的上下限是在多年冻土区从事冻土研究、工程设计施工、气候水文生态模式等方面非常重要的参数,它可以通过破坏环境的有损方法(坑探和钻孔)或无损的物探方法来获取.结合少量的坑探和钻孔资料,应用瞬变电磁法(TEM)对青海省兴海县温泉地区多年冻土进行探测.基本查清了本地区多年冻土分布特征、上下限深度和多年冻土层的厚度,获取了冻土与环境因子的本底数据资料.此次探测结果表明,在多年冻土区应用TEM无论在理论上还是实践上都是可行的,具有适应范围广、施工方便、工作效率高的特点,证明了该方法和技术在多年冻土区有着广泛的应用和发展前景.The permafrost table and base are two of the most important geological variables in near-surface deposits in the continuous permafrost regions,and they are possibly to be determined either by invasive and environmentally destructive techniques（excavation and drilling） or noninvasive low-impact geophysical methods.Geophysical techniques are the most effective way to examine the spatial distribution of subsurface geophysical properties to reveal the active layer and permafrost layer horizontally and vertically.In this study,combination of few excavation and drilling data,transient electromagnetic method（TEM） was used to search the distribution features of permafrost table and base in various places in the Wenquan area of the eastern Tibetan Plateau.Despite that it was reported rarely in permafrost regions,the TEM is able to detect the table features of permafrost.Also,the TEM can characterize the base features of permafrost effectively.It is very promising in permafrost investigations.

关 键 词：温泉地区 多年冻土 多年冻土上限 多年冻土下限 瞬变电磁法(TEM) 

分 类 号：P631.325[天文地球—地质矿产勘探]