CSAMT Case Study: Los Olivos Project, Valle de Olivos, Chihuahua

The Los Olivos Project is located 5 km east of Valle de Olivos near Hidalgo de Parral in the State of Chihuahua. During 1996 CSAMT data were collected along 5 lines forming the Olivos Grid. These data were acquired with the high-power (30 kW) Zonge International CSAMT system. La Parrena, S.A. de C.V. has released surface geology and drill hole results, including the Los Olivos CSAMT data. CSAMT is a high-resolution resistivity mapping technique that uses broadband electromagnetic signals for depth soundings.

For this CSAMT case study, the Zonge International SCS2D inversion code has been used to model these CSAMT data. The SCS2D inversion is a two-dimensional (2-D) finite element solution that not only models flat-lying geology and high-angle contacts, but also resistivity changes associated with topography. The modeled results for each modeled line is presented as a smoothly contoured modeled resistivity depth section. The modeled results for all 5 lines are shown as stacked depth sections viewed to the northwest, but displayed in reverse order with Lines 4 and 5 shown in the forefront.