Gravity, magnetic and resistivity investigations of the Okauia Low Temperature Geothermal System in alluvial sediments of the Hauraki Depression, New Zealand
| Autor: | Robert Reeves, Supri Soengkono |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
geography
Magnetic measurements Gravity (chemistry) geography.geographical_feature_category 010504 meteorology & atmospheric sciences Geology Aquifer Geophysics 010502 geochemistry & geophysics 01 natural sciences Permeability (earth sciences) Electrical resistivity and conductivity Alluvium Sedimentary rock Petrology Geothermal gradient 0105 earth and related environmental sciences |
| Zdroj: | Exploration Geophysics. 48:316-331 |
| ISSN: | 1834-7533 0812-3985 |
| DOI: | 10.1071/eg15052 |
| Popis: | Gravity, ground magnetics, DC resistivity traversing, and time domain electromagnetic soundings (fixed-loop and in-loop) were conducted to investigate the Okauia Low Temperature Geothermal System near the eastern boundary of the Hauraki Depression in North Island of New Zealand. The gravity study revealed a hidden extension of the Tertiary-age Waiteariki Ignimbrite, underlying plio-Pleistocene alluvium deposits of the Hinuera Formation, which locally host an aquifer of warm geothermal fluids. A 3D magnetic model derived from the ground magnetic measurements helped identify probable paleo-channels within the sedimentary sequence of the Hinuera Formation. These paleo-channels could represent higher permeability at shallow ( |
| Databáze: | OpenAIRE |
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