Focused magmatism beneath Uturuncu volcano, Bolivia: Insights from seismic tomography and deformation modeling

статья в журнале
Авторы: Kukarina E.   (ИНГГ СО РАН)   West M.     Keyson L.H.     Koulakov I.   (ИНГГ СО РАН)   Tsibizov L.   (ИНГГ СО РАН)   Smirnov S.    
дата публикации: 2017
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.
первоисточник: Geosphere
том: 6
страницы: 1855-1866
внешние ссылки:
WoS   WoS (цитирование)






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