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
收藏
页码：542 / 552
页数：11
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