3D modeling of geomagnetic induction data from Queensland, Australia

A 3D model of the electrical conductivity structure of the Australian state of Queensland is presented since previous investigations lead to different locations of an electrical conductivity anomaly in the western part of the state. It is known as the 'Carpentaria Conductor' and was located 141°E striking northwest-southeast with a length of 700 kilometers due to present results.

Geomagnetic induction data of 37 sites with an average spacing of 150 kilometers was analyzed. Initially, induction arrow maps were created revealing the Carpentaria Conductor and an enhanced resistive area of 1,000 x 1,000 kilometer in the southeast of the state. The aforementioned 3D model is derived from the inversion of the data and showed another enhanced conductive anomaly in the center of the state with a diameter of approximately 100 kilometers and a depth of 3 to approximately 30 kilometers.