An Oxygen Isotope Study Of Silicates In The Larderello Geothermal Field, Italy

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Journal Article: An Oxygen Isotope Study Of Silicates In The Larderello Geothermal Field, Italy

Abstract
Stable-isotope analyses were carried out on hydrothermal minerals sampled from the deep metamorphic units at Larderello, Italy. The D18O values obtained for the most retentive minerals, quartz and tourmaline, are from + 12.0‰ to + 14.7‰ and 9.9‰, respectively, and indicate deposition from an 18O-rich fluid. Calculated D18O values for these fluids range from + 5.3‰ to + 13.4‰. These values, combined with available fluid inclusion and petrographic data, are consistent with the proposed existence of an early thermal fluid of probable magmatic origin and a late meteoric water. Mixing between these two fluids occurred locally.

Authors 
Eleonora Petrucci, Giovanni Gianelli, Mariano Puxeddu and Paola Iacumin








Published Journal 
Geothermics, 1994





DOI 
Not Provided
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Citation

Eleonora Petrucci,Giovanni Gianelli,Mariano Puxeddu,Paola Iacumin. 1994. An Oxygen Isotope Study Of Silicates In The Larderello Geothermal Field, Italy. Geothermics. (!) .