Яндекс.Метрика

E. Kukarina,M.West,L.H.Keyson, I. Koulakov, L. Tsibizov, S. Smirnov

Выпуск: 6 , Том: 13 , Год издания: 2017
Сериальное издание: Geosphere
Страницы: 1855-1866

Аннотация

We have carried out a tomographic inversion for seismic velocity in the vicinity of Uturuncu volcano (Bolivia) based on a 33-station temporary seismic network deployment. We combine travel times from earthquakes in the shallow crust with those from earthquakes on the subducting Nazca plate to broadly constrain velocities throughout the crust using the LOTOS tomography algorithm. The reliability and resolution of the tomography is verified using a series of tests on real and synthetic data. The resulting three-dimensional distributions of Vp, Vs, and Vp/Vs reveal a large tooth-shaped anomaly rooted in the deep crust and stopping abruptly 6 km below the surface. This feature exhibits very high values of Vp/Vs (up to 2.0) extending to ~80 km depth.
индекс в базе ИАЦ: 049469