Abstract
The authors have discussed the formation,distribution and properties of hydrochemical anomalies constituted by the concentrations of benzene,me-htyl-benzene,phenol and dissolved hydrocarbon gases in surface water of Nong-an structure,Jilin Province,and the obsorption intensity of the same sur-face water determined by ultraviolet spectrum(260,310nm)and fluorescence spectrum(450nm),in order to guide oil and gas prospecting in the adjacent area.