Shear wave velocity variation across the Taupo Volcanic Zone, New Zealand, from receiver function inversion

Geophysical Journal International
By: , and 

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Abstract

The Taupo Volcanic Zone (TVZ), New Zealand is a region characterized by very high magma eruption rates and extremely high heat flow, which is manifest in high-temperature geothermal waters. The shear wave velocity structure across the region is inferred using non-linear inversion of receiver functions, which were derived from teleseismic earthquake data. Results from the non-linear inversion, and from forward synthetic modelling, indicate low S velocities at ∼6–16 km depth near the Rotorua and Reporoa calderas. We infer these low-velocity layers to represent the presence of high-level bodies of partial melt associated with the volcanism. Receiver functions at other stations are complicated by reverberations associated with near-surface sedimentary layers. The receiver function data also indicate that the Moho lies between 25 and 30 km, deeper than the 15 ± 2 km depth previously inferred for the crust–mantle boundary beneath the TVZ. 

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Shear wave velocity variation across the Taupo Volcanic Zone, New Zealand, from receiver function inversion
Series title Geophysical Journal International
DOI 10.1111/j.1365-246X.2004.02384.x
Volume 159
Issue 1
Year Published 2004
Language English
Publisher Oxford Academic
Contributing office(s) Volcano Hazards Program
Description 20 p.
First page 291
Last page 310
Country New Zealand
Other Geospatial Taupo volcanic zone