Geothermal Implications of Resistivity Mapping in Lake Taupo
- Location
- Lake Taupo, New Zealand; Taupo Volcanic Zone
- Conference
- New Zealand Geothermal Workshop
- Year
- 1992
- Session
- Geophysics
- Language
- English
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Abstract
A waterborne DC resistivity survey of Lake Taupo was conducted in early 1992 using a towed electrode may. A large area of low apparent resistivity forming a moat-like feature around the Horomatangi Reefs was observed. This area is known to mark the vent of the Taupo eruption about years ago. The lowresistivity is interpreted as the signature of a hydrothermal system lying within the collapse structureformed by this eruption. The reefs appear to form a 'plug' within this structure with geothermal fluid entering the lake in an annulus surrounding the reefs. A less distinct area of low resistivity occurs near the mouth of Western Bay and may also mark the site of an eruption,perhaps the Ignimbrite about years ago.
Copyright 1992, University of Auckland. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.