Fluid geochemistry of the Acqui Terme-Visone geothermal area (Piemonte, Italy)

Details

Serval ID
serval:BIB_E1339EB57BAC
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Fluid geochemistry of the Acqui Terme-Visone geothermal area (Piemonte, Italy)
Journal
Applied Geochemistry
Author(s)
Marini L., Bonaria V., Guidi M., Hunziker J.C., Ottonello G., Zuccolini M.V.
ISSN-L
0883-2927
Publication state
Published
Issued date
2000
Peer-reviewed
Oui
Volume
15
Pages
917-935
Language
english
Notes
ISI:000087308900003
Abstract
The main geothermal reservoir of Acqui Terme-Visone hosts Na-Cl waters,
which are in chemical equilibrium at 120-130 degrees C with typical
hydrothermal minerals including quartz, albite, K-feldspar, illite,
chlorite (or smectite), anhydrite, calcite and an unspecified
Ca-Al-silicate. In the Acqui Terme-Visone area, these geothermal waters
ascend along zones of high vertical permeability and discharge at the
surface almost undiluted or mixed with cold, shallow waters. To the SW
of Acqui Terme, other ascending geothermal waters, either undiluted or
mixed with low-salinity waters, enter relatively shallow secondary
reservoirs, where they reequilibrate at 65-70 degrees C.
Both chemical and isotopic data indicate that bacterial SO4 reduction
affects all these waters, especially those discharged by the secondary
reservoirs. Therefore, geothermal waters must get in contact with oil,
acquiring the relatively oxidized organic substances needed by
SO4-reducing bacteria. This oil-water interaction process deserves
further investigations, for potential economic implications. (C) 2000
Elsevier Science Ltd. All rights reserved.
Create date
05/12/2012 21:20
Last modification date
20/08/2019 17:05
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