Marionoak ? a very deep conductive target

Abstract

At the Marionoak property in Tasmania, a large deep conductor has served as a good site for testing and comparing deep penetration EM systems such as UTEM, Controlled Source Audio Magnetotellurics (CSAMT) and Sirotem. All of the systems detect the conductor, different problems being encountered when attempting an accurate interpretation of any of them. Up to the time of writing this abstract, a final interpretation had not been tested by drilling.