The simultaneous use of EM conductivity and radiohm resistivity techniques in solution channel detection

الملخص EN

he chalky limestone and marley limestone are the main lithological unit of Euphrates Formation which can be existed and appeared in the area under investigation "north west Haditha area".

When the groundwater passing through these types of rocks, a part of their may suffer from dissolution by means of dissolving process.

Hence, the main task of the present survey is to locate and delineate the buried channels caused by this type of process in the area located in western part of Iraq by applying two EM techniques namely, electromagnetic conductivity and VLFRadiohm electromagnetic resistivity methods.

The Geonics EM34-3 together with the EM16R instruments were used in the field survey.

More than ten predetermined traverses were pegged out in the area at which the EM measurements along these traverses were carried out.

The results come from both surveys in correlation with available geological information have obviously showed a trend of clear and identity feature described as a single buried dissolved channel.