Imaging the Volcanic Structures Beneath Gran Canaria Island Using New Gravity Data

From a new gravity data set that covers homogeneously the whole surface of Gran Canaria (Canary Islands, Spain) and marine in nearest offshore, we have obtained Bouguer anomaly map island which improves previous ones. Using these anomalies, applied inversion approach to investigate structures beneath Island derive 3D sources model. The geometry with anomalous density values is constrained up depth approximately 20,000 m below sea level. interpretation model identified related different volcanic stages Canaria. Several deep-rooted high-density represent intrusive bodies emplaced early formation magma plumbing system Miocene edifices. A low-density body center may be associated syenitic core felsic central edifice (Tejeda Caldera). Shallow fractures acted as feeder dikes monogenetic volcanoes during rejuvenated stage. Finally, NW-SE rift, most important volcano-tectonic structure Canaria, has characteristic gravimetric signature represents long-lived extensional fracture zone controlled activity at least since Miocene.