Scalar CSAMT (Controlled Source Audio Magnetotelluric) Applied to Xiangxi Au-Sb-W Deposit, Hunan, China

The Scalar controlled-source audio magnetotellurics (CSAMT) survey was carried out over the Xiangxi Au-Sb-W deposit and 237 sites in eight lines were acquired. The Lines were designed in NS direction to acquire data in TM mode approximately perpendicular to general trend of the area’s structures. The survey produced apparent resistivity contour maps at ten frequencies: 8, 16, 32, 64, 128, 256, 512, 1024, 2048, and 4096. The CSAMT data provided important information about mineralized layers and structures in the study area so that along with detection, mapping and defining parameters of some mineralized zones, detection of some faults were made possible. Follow-up detailed geological mapping and drilling results verified most of the results of the work.