FLUID ORIGIN AND DYNAMIC AT THE NEWLY DEVELOPED THEISTAREYKIR GEOTHERMAL FIELD, ICELAND

This study aim at deciphering the origin of the fluids and the hydrodynamic of the Theistareykir geothermal system using water isotopes and noble gases as a tracer of these respective contributions. Results first confirm that the magma beneath Theistareykir is a mix between a mantle plume (OIB) and...

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Bibliographic Details
Main Authors: Marion Saby, Daniele Pinti, Vincent van Hinsbger, Bjarni Gautason, Ásgerður Sigurðardóttir, Clara Castro, Chris Hall, Jean-François Hélie, Océane Rocher
Format: Conference Object
Language:unknown
Published: 2019
Subjects:
Noble gas isotopes
water isotopes
geothermal field
Theistareykir
Iceland
Online Access:https://zenodo.org/record/3566003
https://doi.org/10.5281/zenodo.3566003
Description
Summary:This study aim at deciphering the origin of the fluids and the hydrodynamic of the Theistareykir geothermal system using water isotopes and noble gases as a tracer of these respective contributions. Results first confirm that the magma beneath Theistareykir is a mix between a mantle plume (OIB) and an ocean ridge basalt (MORB). They also show that both magmatic fluids and surface water are present in the system in proportions that are being quantifyed. Water isotopes show that sources of surface water range from modern to Pre-Holocene. A crustal input is also present in the system with an enrichment in δ18O highlighting water-rock interaction.

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