The Lake Waikare low enthalpy geothermal resource: An initial study of its origin
Report: TR 2014/45
Author: MOG Balane (University of Auckland)
A regular geochemical assessment is being conducted by Waikato Regional Council, with the objective of understanding the nature and vulnerability of the region’s warm water resources to change.
This report focuses on the Lake Waikare vent. Lake Waikare is situated within the Huntly coalfield in North Waikato, and is host to a small island (Punikanae Island) where a silica sinter-depositing spring is located. This is the only sinter depositing spring known outside the Taupo Volcanic Zone.
|1.1||Background of the study||1|
|1.3||Project location, accessibility, topography and drainage||3|
|2||Geology, structures and alternation||5|
|3.1||Cl-SO4-HCO3 ternary diagram||17|
|3.2||Na-K-Mg ternary diagram||17|
|3.5||Cl-SO4-HCO3 and Na-K-Mg ternary plots for TVZ springs||19|
|3.6||Cl-B-HCO3 ternary diagram||21|
|3.7||Elevated mercury concentrations||22|
|4||Potential uses of the geothermal resource||23|
|Appendix 1: 2005 analytical results from Hill Laboratories||29|