Sulfur and oxygen isotopes in Italian marine sulfates of Permian and Triassic ages

Cortecci, G.; Reyes, E.; Berti, G.; Casati, Paolo

doi:10.1016/0009-2541(81)90072-3

Cited by 74 publications

(26 citation statements)

References 19 publications

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“…Most samples show δ 34 S values of aqueous sulfate from +4‰ to +8.6‰ similar to sulfur isotope compositions measured by Marini et al (1994) in the local magmas (4‰ to 8.5‰), thus supporting an origin mainly from leaching of volcanic rock. A few springs (13 and 17) show slightly higher δ 34 S values (+9.6‰ and +9.8‰, respectively) than one measured in volcanics but lower than the Upper Triassic evaporite deposits (from +13.5‰ to +17.4‰, Cortecci et al, 1981 andMarini et al, 1994 Cortecci et al, 1981; and δ 34 S = +10.6‰ by Marini et al, 1994;respectively (Marini et al, 1994) and the Upper Triassic evaporite deposits (Burano Formation) of the Italian Adriatic area (Cortecci et al, 1981;Marini et al, 1994). Symbols as for Fig.…”

Section: Sulfur Isotope Data Of Dissolved Sulfatementioning

confidence: 95%

“…Although the high δ 34 S values of primitive Vulture magmas may be explained in terms of the partial melting of mantle enriched in 34 S, at present it is impossible to establish the cause (Marini et al, 1994). The δ 34 S data on Upper Triassic evaporite deposits (Burano Formation) in the Adriatic area of Italy range from +13.5‰ to +17.4‰ (Cortecci et al, 1981;Marini et al, 1994). Sulfate in the investigated groundwater samples is characterized by positive δ 34 S values ranging between +6.3‰ and +10.4‰.…”

Section: Sulfur Isotope Data Of Dissolved Sulfatementioning

confidence: 99%

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Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

et al. 2010

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We report the chemical composition of groundwaters-including the first data on the sulfur isotopic composition of dissolved sulfate-from the volcanic aquifers of Mt. Vulture, one of the most important hydrological basins of southern Italy. A total of 27 water samples taken at different altitudes among drilled wells and springs were collected. The majority of groundwaters have a bicarbonate alkaline and bicarbonate alkaline-earth composition. High-salinity waters are sulfatebicarbonate alkaline in composition. The water-rock interaction process is mainly affected from uprising of CO 2 -rich gases which cause an increase of the water acidity promoting basalt weathering with an enrichment in certain chemical species (i.e., Na + , Ca 2+ , SO 4 2-) and a high total carbon content. The δ 34 S values of dissolved sulfate ranging from +4‰ to +8.6‰ can be explained by leaching of volcanites. Higher δ 34 S values (from 9.6‰ to 10.4‰) detected in a few water springs can be ascribed either to the interaction with the pyroclastic layer rich in feldspathoids, such as haüyna, that have sulfur isotopic compositions up to +10.6‰ or animal manure contamination inducing localized bacterial sulfate reduction with an increase in the δ 34 S of sulfate. Taking into account that Upper Triassic evaporite deposits have higher δ 34 S values (from +13.5‰ to +17.4‰,) than those measured in all water samples the dissolution of these deposits could be excluded.

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Section: Sulfur Isotope Data Of Dissolved Sulfatementioning

confidence: 95%

Section: Sulfur Isotope Data Of Dissolved Sulfatementioning

confidence: 99%

Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

et al. 2010

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“…Interaction of deep circulating waters (HS and IS) with anhydrite and carbonates (calcite and dolomite), all fundamental components of the Triassic evaporite formation (Coradossi and Martini, 1965), explains the relatively high SO 4 2À and HCO 3 À concentrations (Table 1) (Table 3), which are similar to the Triassic gypsum and anhydrite (16.0 ± 0.5‰) analyzed by Boschetti et al (2005) from northern Tuscany and Triassic sulfates (15.6 ± 1.0‰) from different Italian sites (e.g. Cortecci et al, 1981Cortecci et al, , 2000Dinelli et al, 1999;Boschetti et al, 2005).…”

Section: Origin Of Watersmentioning

confidence: 77%

A combined geochemical and isotopic study of the fluids discharged from the Montecatini thermal system (NW Tuscany, Italy)

Capecchiacci

Tassi

Vaselli

et al. 2015

Applied Geochemistry

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a b s t r a c tThe thermo-mineral fluids discharges of Montecatini Terme (Northern Apennines, Tuscany, Italy) have been exploited since the Roman times and despite the fact that this thermal complex is one of the biggest in Europe, the most recent geochemical investigations were published almost 40 years ago. To fill this gap, in this paper a detailed geochemical and isotopic investigation on the main thermal springs and wells from the Montecatini thermal system (MTS) is presented.The chemical and isotopic features of the Montecatini waters suggested that they are mainly controlled by water-rock interaction processes between meteoric water, permeating at depth from the surrounding reliefs (up to 800 m a.s.l.), and the Triassic evaporites (Burano Formation) belonging to the Tuscan sedimentary series. The local stratigraphic and tectonic framework favors an efficient recharge of the hydrothermal reservoir by the meteoric precipitation from a large catchment area and this aspect plays a fundamental role for the longevity of the Montecatini thermal spas, notwithstanding the huge amount of thermal water exploited. The C-TDIC values were lower than those expected for a mantle/thermometamorphic CO 2 source. This can be explained by: (i) isotopic fractionation occurring during calcite precipitation and/or (ii) mixing with biogenically derived gases, occurring at relatively shallow depth.

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“…The δ 34 S-SO 4 values (Tab. 2) are slightly less positive than those of the Triassic anhydrites ranging from +15‰ to +20‰ vs V-CDT (Cortecci et al, 1981;Dinelli et al, 1999), confirming that waterrock interactions involving this evaporitic formation is the dominant source of SO 4 2-for Lake Accesa. However, considering that isotopic fractionation caused by dissolution of solid sulfates in water is negligible (Tuttle et al, 2009), minor sulfur contribution from 32 S-rich sulfide deposits (Cortecci et al, 1983) cannot be excluded.…”

Section: Processes Controlling the Lake Water Chemistrymentioning

confidence: 82%

Hydrogeochemical processes controlling water and dissolved gas chemistry at the Accesa sinkhole (southern Tuscany, central Italy)

et al. 2014

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Sulfur and oxygen isotopes in Italian marine sulfates of Permian and Triassic ages

Cited by 74 publications

References 19 publications

Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

Groundwaters of Mt. Vulture volcano, southern Italy: Chemistry and sulfur isotope composition of dissolved sulfate

A combined geochemical and isotopic study of the fluids discharged from the Montecatini thermal system (NW Tuscany, Italy)

Hydrogeochemical processes controlling water and dissolved gas chemistry at the Accesa sinkhole (southern Tuscany, central Italy)

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