Near-surface study of a hot spring site in Fiji

Lal, A.; Deo, R. N.; Kumar, A.

doi:10.1007/s11600-018-0173-7

Artykuł - szczegóły

Tytuł artykułu

Near-surface study of a hot spring site in Fiji

Autorzy

Lal A. , Deo R. N. , Kumar A.

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-018-0173-7

Warianty tytułu

Języki publikacji

Abstrakty

A geophysical investigation of a hot spring system located in Rabulu, Fiji, was carried out from October 2014 to March 2015. The investigation covered a survey area of 6075 m2. Self-potential (SP), ground temperature and soil carbon dioxide (CO2) concentrations were measured and investigated for their distribution characteristics and inter-linkages. Results indicated obvious anomalous zone at the hot spring discharge site. The SP profile analysis highlighted thermal water upwelling zones and elevation-driven subsurface groundwater pathways. Measurement of subsurface temperatures up to 1 m depths revealed increasing temperatures, indicating potentially high thermal gradients in the area. Surface soil CO2 distributions also agreed with SP and ground temperature results. The overall result of the study demonstrated that synchronised measurements of SP, ground temperature and soil CO2 can be instrumental in identifying anomalous zones near the hot spring sites. Other parameters such as spring water temperature, discharge rate and energy flux estimates from the spring were calculated and analysed. The high-dense multi-parameter data coverage allowed interpretation of geothermal features at a scale never conducted in Fiji before. The near-surface investigations reported in this study corroborate previously suggested steady geothermal activity in the region, deserving further detailed investigation.

Słowa kluczowe

geophysical investigation self-potential spatial distribution high thermal gradient geothermal activity near-surface

badania geofizyczne potencjał własny rozkład przestrzenny wysoki gradient termiczny aktywność geotermalna

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2018

Tom

Vol. 66, no. 4

Strony

659--672

Opis fizyczny

Bibliogr. 68 poz.

Twórcy

autor

Lal A.

alvin.lal@my.jcu.edu.au

School of Engineering and Physics, Faculty of Science Technology and Environment, University of the South Pacific, Laucala Campus, Suva, Fiji

autor

Deo R. N.

School of Engineering and Physics, Faculty of Science Technology and Environment, University of the South Pacific, Laucala Campus, Suva, Fiji

autor

Kumar A.

School of Engineering and Physics, Faculty of Science Technology and Environment, University of the South Pacific, Laucala Campus, Suva, Fiji

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