f GEOPHYSICAL INVESTIGATION AT THE PROPOSED CONCENTRATOR AREAS, IN AN IMPORTANT PROJECT IN SOUTH OF PERU, USING MEASUREMENTS OF COMPRESSIVE (P) AND SHEAR (S) WAVES.

Before evaluating the final location of the future facilities we need to characterizer and describe the soil foundation. One of the studies that we development to support our future decisions is the measurements of compressive (P) and shear (S) waves. The investigation of the ground site (in the Concentrator Areas) was conducted through geophysical testing using the seismic refraction test method, and surface wave measurement methods such as the multichannel analysis of surface waves (MASW) method and the multichannel array of microtremors (MAM) method. From the interpretation of the velocity of compressive (P) and shear (S) waves, the thickness and stiffness of soil layers at the project site were determined. The geophysical investigation was carried out to estimate the soil profile in the foundation areas of the projected facilities, through the determination of the velocity of propagation of both P (Vp) and S (Vs) waves in the ground, using surface seismic refraction tests for P-wave measurements, and MASW/MAM tests for Swave velocities.