Investigating fossil hydrothermal systems by means of fluid inclusions and stable isotopes in banded travertine: an example from Castelnuovo dell’Abate (southern Tuscany, Italy)

Rimondi, Valentina; Costagliola, Pilario; Ruggieri, Giovanni; Benvenuti, Marco; Boschi, Chiara; Brogi, Andrea; Capezzuoli, Enrico; Morelli, Guia; Gasparon, Massimo; Liotta, Domenico

doi:10.1007/s00531-015-1186-y

Cited by 19 publications

(11 citation statements)

References 95 publications

(141 reference statements)

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“…In addition, we documented a N-S-striking fault at Semproniano village that cuts through the fissure ridge with an oblique-extensional shear. This fault pattern of N-S-and E-W-striking faults is similar to nearby hydrothermal areas in southern Tuscany (e.g., Brogi et al, 2010aBrogi et al, , 2012Rimondi et al, 2015) and along the Tyrrhenian margin (see following).…”

Section: Tectonic Synthesissupporting

confidence: 62%

“…The Albegna basin hydrothermal system and associated travertine deposition are still active at Bagni di Saturnia. Integrating previous data from nearby similar hydrothermal settings (Taddeucci and Voltaggio, 1987;Brogi et al, 2012;Rimondi et al, 2015), we can link the middle Pleistocene onset of hydrothermal activity in southern Tuscany with the main phases of crustal uplift and emplacement of magmatic bodies in the region (Barberi et al, 1994), with the volcanic activity of the Mount Amiata (300-190 ka; Cadoux and Pinti, 2009) and Vulsini Mountains (590-127 ka; Nappi et al, 1995), and with hypogenic speleogenesis (69-19 ka;Piccini et al, 2015). This hydrothermal scenario is consistent with the occurrence of a regional thermal anomaly below the Tuscan magmatic province, producing long-lived convective circulation of endogenic fluids during the Pleistocene (Minissale, 2004).…”

Section: Tectonic Synthesismentioning

confidence: 99%

“…1 and 2). Recent studies of travertine and hydrothermal ore deposits have documented structurally controlled fluid flow in the region (e.g., Bellani et al, 2004;Brogi and Fabbrini, 2009;Brogi et al, 2010a;Liotta et al, 2010;Rossetti et al, 2007Rossetti et al, , 2011Rimondi et al, 2015;Croci et al, 2016;Berardi et al, 2016). In particular, Pliocene-Pleistocene faulting has played a primary role in the endogenic fluid circulation that fed and still feeds some geothermal fields and CaCO 3 -rich springs in the Mount Amiata geothermal area (Brogi et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Tectonics, hydrothermalism, and paleoclimate recorded by Quaternary travertines and their spatio-temporal distribution in the Albegna basin, central Italy: Insights on Tyrrhenian margin neotectonics

et al. 2016

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The Neogene-Quaternary Albegna basin (southern Tuscany, central Italy), located to the south of the active geothermal field of Monte Amiata, hosts fossil and active thermogene travertine deposits, which are used in this study to reconstruct the spatio-temporal evolution of the feeding hydrothermal system. Travertine deposition is controlled by regional tectonics that operated through distributed N-Sand approximately E-W-striking transtensional fault arrays. The geochronological data set (230 Th/ 234 U, uranium-series disequilibrium) indicates a general rejuvenation (from >350 to <40 ka) of the travertine deposits moving from north to south and from higher to lower elevations. Negative d 13 C and positive d 18 O trends with younger deposition ages and lower depositional elevations provide evidence for a change in space and time of the hydrothermal fluid supply, suggesting a progressive dilution of the endogenic fluid sources by increasing meteoric water inputs. Comparison with paleoclimate records suggests increased travertine deposition during humid interglacial periods characterized by highstands of the water table. Travertine deposits of the Albegna basin record the interactions and feedbacks among tectonics, hydrothermalism, and paleoclimate within a region of positive geothermal anomaly during the Quaternary. Our study also sheds light on the neotectonic evolution of the Tyrrhenian margin of central Italy, where hydrothermalism has been distributed along margin-transverse structures during the Pleistocene and Holocene. It is hypothesized that originally upper-crustal, margin-transverse faults have evolved to through-going crustal features during the Quaternary, providing structurally controlled pathways for hydrothermal fluids. We suggest that this was the consequence of a change in the relative magnitude of the principal stress vectors along the Tyrrhenian margin that occurred under a regional stress field dominated by a continuous extensional regime.

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Section: Tectonic Synthesissupporting

confidence: 62%

Section: Tectonic Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tectonics, hydrothermalism, and paleoclimate recorded by Quaternary travertines and their spatio-temporal distribution in the Albegna basin, central Italy: Insights on Tyrrhenian margin neotectonics

et al. 2016

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“…In fact, reservoir temperatures calculated for the Reşadiye spring are from 76 to 106 °C (Mutlu & Güleç, ), which are slightly lower than homogenization temperatures measured in FIs (114–148 °C). In some other studies, the temperature difference between thermal springs and fluids trapped in FIs in fissure‐ridge type travertines is attributed to progressive cooling of fluids in time (e.g., Gasparrini et al, ; Rimondi et al, ).…”

Section: Discussionmentioning

confidence: 99%

Geochemistry of Fluid Inclusions in Travertines From Western and Northern Turkey: Inferences on the Role of Active Faults in Fluids Circulation

Rizzo

Uysal

Mutlu

et al. 2019

Geochem Geophys Geosyst

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The understanding of the relationship between the geochemistry of fluids circulating during travertine deposition and the presence of active faults is crucial for evaluating the seismogenetic potential of an area. Here we investigate travertines from Pamukkale and Reşadiye (Turkey), sited in seismic regions and next to thermal springs. These travertines formed ~24,500–50,000 (Pamukkale) and ~240–14,600 years (Reşadiye) BP. We characterize fluid inclusions (FIs) and studied concentration of H2O, CO2, O2 + N2, and 3He, 4He, 20Ne, and 40Ar, and bulk composition (trace elements and δ13C‐δ18O). FIs from both localities are mainly primary with low salinity and homogenization temperature around 136–140 °C. H2O is the major component followed by CO2, with the highest gas content measured in Pamukkale travertines. Concentrations of Ne‐Ar together with O2 + N2 indicate that travertines from both areas precipitated from atmosphere‐derived fluids. The 3He/4He is 0.5–1.3 Ra in Pamukkale and 0.9–4.4 Ra in Reşadiye. Samples with R/Ra > 1 are modified by cosmogenic 3He addition during exposure to cosmic rays. Excluding these data, FIs of Reşadiye are mostly atmosphere‐derived. This implies a shallow formation where the circulation was dominated by meteoric waters, which is consistent with their young age. Instead, FIs of Pamukkale show mixing of mantle‐, crustal‐, and atmosphere‐derived He, indicating that these travertines formed in lithospheric fractures. Based on the δ13CCO2 and δ18O of bulk rocks, we infer that travertines formed involving crustal‐ (mechanochemical rather than organic) and mantle‐derived CO2. Trace elements of Pamukkale and Reşadiye show comparable rare earth element patterns. We conclude that travertines formed in response of seismogenetic activity.

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“…Geochemical element, stable and radiogenic isotope data are the ultimate tools in deducing fluid characteristics, origin of Ca 2+ and CO2, fluid source rocks and reconstructing the palaeohydrology of ancient spring systems (Minissale et al, 2002;Minissale, 2004;Teboul et al, 2016;Claes et al, 2019). In addition, fluid inclusion studies can provide direct information about the origin, temperature and subsurface interaction of travertine precipitating fluids (Słowakiewicz, 2003;El Desouky et al, 2015;Rimondi et al, 2015;Capezzuoli et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Fossil travertine system and its palaeofluid provenance, migration and evolution through time: Example from the geothermal area of Acquasanta Terme (Central Italy)

Janssens

Capezzuoli

Claes

et al. 2020

Sedimentary Geology

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The geothermal area of Acquasanta Terme has often been studied for its active and fossil travertine deposits to elucidate fluid origin, geodynamic and hydrological setting. Even though present-day thermal springs are usually used to obtain most information, the three travertine terraces bordering the Tronto river contain a plethora of information. A combination of elemental and isotope analyses (δ 18 O, δ 13 C and 87 Sr/ 86 Sr-ratio), fluid inclusion microthermometry and U-Th dating is used to verify the hydrogeology and its timing. These analyses point out two fluid reservoirs with distinctly different fluids, one with low salinity of 0.7 wt% NaCl eq. and another with 28.5 wt% NaCl eq., which corresponds to the fluid composition of present-day spring fluids. Furthermore, it is demonstrated that geothermal sources were intermittently active in the past 221 ka mainly during uneven-numbered marine isotope stages, which are related to humid, interglacial periods and resulted in three different travertine terraces around 210.5, 126.5, and 36.5 ka. Accordingly, an uplift rate for this area could be estimated at around 1 mm/ka. The fluids were tapped at a depth of approximately 3 km in the tectonized, cataclastic fraction of the Triassic Anidriti di Burano Formation, the Calcare Cavernoso Formation and are originally meteoric based on geochemical evidence of a uniform 87 Sr/ 86 Sr-ratio of 0.707914 ± 0.00019 and a δ 18 Oaragonite value of -11.90 ± 0.34 ‰, which has been depressed by elevated precipitation temperatures between 22.2 and 50 °C. The characterization and dating of fossil travertine deposits gives valuable data providing insights in long-term fluid flow and orogenic uplift rates, adding valuable information to present-day spring fluid characterization.

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Investigating fossil hydrothermal systems by means of fluid inclusions and stable isotopes in banded travertine: an example from Castelnuovo dell’Abate (southern Tuscany, Italy)

Cited by 19 publications

References 95 publications

Tectonics, hydrothermalism, and paleoclimate recorded by Quaternary travertines and their spatio-temporal distribution in the Albegna basin, central Italy: Insights on Tyrrhenian margin neotectonics

Tectonics, hydrothermalism, and paleoclimate recorded by Quaternary travertines and their spatio-temporal distribution in the Albegna basin, central Italy: Insights on Tyrrhenian margin neotectonics

Geochemistry of Fluid Inclusions in Travertines From Western and Northern Turkey: Inferences on the Role of Active Faults in Fluids Circulation

Fossil travertine system and its palaeofluid provenance, migration and evolution through time: Example from the geothermal area of Acquasanta Terme (Central Italy)

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