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

Geophysical Journal International

By:
, ,
DOI: 10.1111/j.1365-246X.2004.02384.x

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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. ?? 2004 RAS.

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
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geophysical Journal International
First page:
291
Last page:
310
Number of Pages:
20