Through an analysis and study of the composition of individual oyster bodies in the coastal area of Tianjin and

according to obvious resistance difference between the oyster body and the wall rock, the author adopted the high-density

electric method to conduct the detection. Compared with other techniques, this method is characterized by high efficiency,

rapidness and accuracy. With the inspection of a few drill holes, this method can attain the aim of both realizing largearea

survey and reducing exploration expenses.