Shear wave velocity variation across the Taupo Volcanic Zone, New Zealand, from receiver function inversion
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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.
Study Area
| 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 |
| Google Analytic Metrics | Metrics page |