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f Can Magnetotellurics Map Crustal Strain Levels? Examples from North America and New Zealand
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 5th International Congress of the Brazilian Geophysical Society, Nov 1997, cp-299-00237
Abstract
Magnetotelluric (MT) results from three diverse tectonic settings exhibit strong correlations between increased electrical conductivity and expected depths of enhanced crustal strain. The environments are a young caldera complex and the Basin and Range (BR) Province, both in North America, and the transpressional Southern Alps of New Zealand. Conductivity patterns at >10 Ian beneath the Valles caldera are strongly congruent with isotherms projected from geothermal drill holes up to 4.5 Ian deep.