| Title | Geothermal Implications of Resistivity Mapping in Lake Taupo |
|---|---|
| Authors | Caldwell, T.G., and Bibby, H.M. |
| Year | 1992 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| 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. |