Publication

A magnetotelluric study of the alpine fault, new zealand

Ingham, Malcolm
; 
Brown, Colin
Identifiers
http://hdl.handle.net/10379/9335
 https://doi.org/10.13025/24199
Publication Date
1998-11-01
Keywords
alpine fault, magnetotelluric sounding, resistivity, convergent plate boundary, southern alps, electrical structure, mohr circles, island, decomposition, soundings, beneath, orogen
Type
Article
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Citation
Ingham, Malcolm; Brown, Colin (1998). A magnetotelluric study of the alpine fault, new zealand. Geophysical Journal International 135 (2), 542-552
Abstract
Magnetotelluric soundings have been made at seven locations on a 4 km profile crossing the Alpine Fault in the South Island of New Zealand. The 'distortion' techniques of Groom & Bailey (1989) and Lilley (1998 a,b) have been used to derive regional apparent resistivity and phase curves that correspond to electromagnetic induction in orientations parallel and perpendicular to the fault. 2-D inversion of the regional responses reveals that a narrow (<1 km wide) conductive zone is associated with the Alpine Fault. This conductor is most probably related to the heating of deep circulating meteoric water in a region in which enhanced temperatures occur at shallow depth due to the tectonic uplift of the Southern Alps.
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Publisher
Oxford University Press (OUP)
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Attribution-NonCommercial-NoDerivs 3.0 Ireland
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Externally hosted open access publications with University of Galway authors (1)