A magnetotelluric study of the Alpine Fault, New Zealand

Details A magnetotelluric study of the Alpine Fault, New Zealand A magnetotelluric study of the Alpine Fault, New Zealand

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998geoji.135..542i&link_type=abstract

Geophysical Journal International, Volume 135, Issue 2, pp. 542-552.

Computer Science

Sound

7

Alpine Fault, Magnetotelluric Sounding, Resistivity

Scientific paper

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.

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