Geothermal energy involves transfer of
heat from great depth to the surface via the flow of hot fluid, which is stored in subsurface reservoirs.
This hot fluid also transports metals to produce rich mineral deposits containing gold
and silver. These systems occur in a
diversity of geological settings where there
is anomalous heat flow.
With 35 years of experience, I evaluate and assess how and where
geothermal and mineral resources occur. I specialize in
analyzing and interpreting chemical, mineralogical,
hydrological, lithological, geophysical, and other
geoscientific data associated with hot springs, wells,
volcanoes and gold-silver deposits. I also deliver short
courses (1-5 days), and I lead field excursions through the
Taupo Volcanic Zone and Coromandel Peninsula.
I split my time
between Auckland, New Zealand and Salt
Lake City, Utah (EGI, U Utah). I am the former
Director of the Geothermal Institute, University of Auckland.
I have worked on many geothermal systems and gold-silver
deposits in New Zealand and around the Pacific Rim. I have
published over 70 scientific articles on a wide range of
topics dealing with geothermal systems, hot springs,
hydrothermal minerals, and the formation of epithermal
precious metal deposits.
I provide the best
geoscientific advice and interpretations of rocks, minerals,
and fluids in disovery and exploitation of geothermal and