Open AccessA magnetotelluric study of the Alpine Fault, New Zealand
Author(s) -
Ingham Malcolm,
Brown Colin
Publication year - 1998
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1046/j.1365-246x.1998.00659.x
Subject(s) - magnetotellurics , geology , seismology , fault (geology) , inversion (geology) , tectonics , conductor , san andreas fault , electrical conductor , geophysics , geodesy , electrical resistivity and conductivity , geometry , mathematics , engineering , electrical engineering , physics , quantum mechanics
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 (1998a,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.