A magnetotelluric study of the Alpine Fault, New Zealand

被引：18

作者：

Ingham, M

Brown, C

机构：

[1] Victoria Univ Wellington, Inst Geophys, Wellington, New Zealand

[2] Univ Coll Galway, Appl Geophys Unit, Galway, Ireland

来源：

GEOPHYSICAL JOURNAL INTERNATIONAL | 1998年 / 135卷 / 02期

关键词：

Alpine Fault; magnetotelluric sounding; resistivity;

D O I：

10.1046/j.1365-246X.1998.00659.x

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

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.

引用

页码：542 / 552

页数：11

共 30 条

[11] Magnetotelluric soundings across the South Island of New Zealand: Electrical structure associated with the orogen of the Southern Alps [J].