Quantifying the role of hydrothermal alteration in creating geothermal and epithermal mineral resources: The Ohakuri ignimbrite (Taupō Volcanic Zone, New Zealand)

•Silicification reduces matrix permeability by up to four orders of magnitude.•Alteration to clay only reduces matrix permeability by up to an order of magnitude.•Only silicification increases propensity for permeability enhancing fracture formation.•Silicified rock-masses (reservoir) are more perme...

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Veröffentlicht in:	Journal of volcanology and geothermal research 2020-01, Vol.390, p.106703, Article 106703
Hauptverfasser:	Heap, Michael J., Gravley, Darren M., Kennedy, Ben M., Gilg, H. Albert, Bertolett, Elisabeth, Barker, Shaun L.L.
Format:	Artikel
Sprache:	eng
Schlagworte:	Earth Sciences Epithermal Geophysics Geothermal Hydrothermal alteration Permeability Porosity Sciences of the Universe Uniaxial compressive strength
Online-Zugang:	Volltext
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