 Magnetotelluric investigation of the region has shown evidence of a high-conductivity structure underground between Chiliques, Cordón de Puntas Negras and Láscar.This high conductivity zone reaches a depth of at its southern end, and it might reflect the presence of magma underground.The lake Laguna Lejia lies north of Chiliques volcano, other parts of the volcano drain into the Salar de Atacama; the volcano forms part of the drainage divide of the salar.