Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Doveri, Marco; Mussi, Mario

doi:10.3390/w6082255

Cited by 31 publications

(11 citation statements)

References 23 publications

(27 reference statements)

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“…According to Forti et al (1990), Doveri and Mussi (2014) and Guastaldi et al (2014), the Mesozoic carbonate formations constitute an important regional aquifer in Southern Tuscany that feeds the active hydrothermal springs in present day (Minissale et al, 2002b). In addition to the Marsiliana travertines, other Miocene thermogene deposits have been identified in the adjacent Ombrone Basin (Bossio et al, 2003(Bossio et al, -2004 and in the Volterra Basin, close to Pignano (Gandin et al, 2002;Capezzuoli et al, 2004Capezzuoli et al, , 2009).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Croci

Porta

Capezzuoli

2016

Sedimentary Geology

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Highlights• Α facies analysis of continental carbonates and terrigenous deposits was conducted.• The interplay between hydrothermal travertines and alluvial/colluvial deposits was demonstrated.• The basin fill and depositional architecture of a continental extensional basin were studied.• Extrinsic factors controlling the evolution of the sedimentary succession were determined. ABSTRACTThe extensional Neogene Albegna Basin (Southern Tuscany, Italy) includes several thermogene travertine units dating from the Miocene to Holocene time. During the late Miocene (Messinian), a continental fault-controlled basin (of nearly 500-km 2 width) was filled by precipitated travertine and detrital terrigenous strata, characterized by a wedge-shaped geometry that thinned northward, with a maximum thickness of nearly 70 m. This mixed travertineterrigenous succession was investigated in terms of lithofacies types, depositional environment and architecture and the variety of precipitated travertine fabrics. The studied continental succession in an extensional basin provides valuable information about the interplay between thermogene travertine and alluvial/colluvial deposition, which in turn might improve the understanding of similar fault-controlled continental depositional systems in outcrops and the subsurface.

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Section: Accepted M Manuscriptmentioning

confidence: 99%

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Croci

Porta

Capezzuoli

2016

Sedimentary Geology

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“…The water balance model includes surface runoff as well as groundwater recharge, and it also takes into consideration the influence of climate change and human activities on groundwater recharge, while simultaneously researching the influence of climate change on water resources [4,5]. Doveri, M. et al utilized water isotopes as environmental tracers for the conceptual understanding of groundwater flow [6]. Cervi, F. et al studied 12 springs from the northern Apennines of Italy by means of a comprehensive hydrogeological investigation to unravel recharge processes taking place in a highly fractured slab of flysch rock hosting the corresponding aquifers [7].…”

Section: Introductionmentioning

confidence: 99%

Climate Change and Its Influence on the Karst Groundwater Recharge in the Jinci Spring Region, Northern China

Jia

Zang

Zheng

et al. 2017

Water

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Due to climate change and human activities over the last fifty years, the spring flow volume of karst groundwater has sharply diminished in China. Climate change is one of the critical factors that initiates a series of karst hydrogeologic and water ecological environmental problems, because the precipitation shows a decreasing trend while the temperature shows an increasing trend. The Jinci Spring is one of the largest, most famous springs in northern China. This study employed data from the Taiyuan Meteorological Station and ten precipitation stations in and around the Jinci Spring region as well as the runoff data gathered from two hydrological monitoring stations during 1960-2012. The sliding average method and the Mann-Kendall test were used to analyze the variation tendency of precipitation, temperature, and land evaporation in this area. Finally, the following were calculated: the varying pattern of the karst groundwater recharge amount and the response of the recharge amount to precipitation, land evaporation, and river runoff by quantitative analysis. The results indicated that the precipitation and land evaporation amount decreased at first and then subsequently increased. Likewise, the variation trend of the karst groundwater recharge amount in the spring region was roughly consistent with the precipitation variation pattern. In contrast, the temperature displayed an increasing trend. The climate change resulted in a reduction of the karst groundwater recharge amount, and it had the greatest influence in the 1990s, which caused the karst groundwater recharge amount to decrease 26.75 mm as compared to that of the 1960s (about 39.68% lower than that of the 1960s). The Jinci Spring had zero flow during this period. The reduction in precipitation was one of main factors that caused the cutoff of the Jinci Spring.

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“…The 18 O/ 16 O and 2 H/ 1 H isotopic ratios (expressed as δ 18 O and δD ‰ vs. VSMOW) were determined by using a Finnigan MAT 250 Delta-S mass spectrometer using standard procedures (Doveri and Mussi, 2014). The analytical precision was 0.1‰ for δ 18 O and 1‰ for δD.…”

Section: Chemical and Isotopic Analysis Of Water Samplesmentioning

confidence: 99%

The Campo de Calatrava Volcanic Field (central Spain): Fluid geochemistry in a CO2-rich area

Nisi

Vaselli

Elío

et al. 2019

Applied Geochemistry

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The Campo de Calatrava Volcanic Field (CCVF) located in central-southern Spain (along with Selva-Emporda in Catalonia, NE Spain) is regarded as one of the most important CO 2 emitting zones in Peninsular Spain. Here, we report and evaluate new molecular and isotopic geochemistry of thermal waters and CO 2-rich gas discharges from the CCVF. Locally, these CO 2-rich fluid emissions represent the remnants of the past volcanic activity that affected this area from the late Miocene through the Quaternary, with the most recent events occurring in the Holocene. The locations of discharging fluids and previous volcanic centers appear to be aligned along welldefined NW-SE and NNW-SSE lineaments, with subordinate trends in the ENE-WSW direction. The chemical and isotopic composition of the thermal waters suggests a meteoric origin, dominated by three distinct geochemical facies: 1) HCO 3-Mg(Ca) type waters, associated with a relatively shallow aquifer and related to the interaction of meteoric waters with CO 2-rich gases, alkaline volcanic products, and sedimentary formations, 2) SO 4 (Cl)-Ca(Mg) type waters, which stems from the two rivers (Guadiana and Jabalón) that drain Triassic evaporitic rocks before entering the study area, and 3) HCO 3-Na type waters, hosted in deep geopressurized CO 2-rich reservoirs within the Ordovician basement rocks. The 87 Sr/ 86 Sr isotopic compositions (ranging between 0.70415 and 0.71623) and δ 34 S-SO 4 values (+10.7 to +18.3‰ vs. CDT) of CO 2-rich fluids are consistent with interactions between water and either the Paleozoic basement, Triassic evaporites, Quaternary volcanic rocks, or a combination thereof. Dissolution of a CO 2-rich gas phase into the aquifer produces low pH values (down to 5.4) and enhances water-rock interactions causing relatively high salinity (Total Ionic Salinity: up to ∼185 meq/L). Carbon dioxide is by far the most abundant gas constituent (up to 992 mmol/mol) and is dominated by mantle-derived sources as indicated by the combination of relatively high helium isotopic ratios (up to 2.7 R/Ra), high isotopic ratios of carbon in CO 2 (ranging between −6.8 and −3.2‰ V-PDB), and the carbon isotopic signature of TDIC (from −6.8 to +2.2‰ vs. VPDB). In the last two decades, numerous (CO 2-rich) gas blowouts have occurred in the area during well drillings, suggesting the presence of a geopressurized gas reservoir at relatively shallow depth.

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Water Isotopes as Environmental Tracers for Conceptual Understanding of Groundwater Flow: An Application for Fractured Aquifer Systems in the “Scansano-Magliano in Toscana” Area (Southern Tuscany, Italy)

Cited by 31 publications

References 23 publications

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Depositional architecture of a mixed travertine-terrigenous system in a fault-controlled continental extensional basin (Messinian, Southern Tuscany, Central Italy)

Climate Change and Its Influence on the Karst Groundwater Recharge in the Jinci Spring Region, Northern China

The Campo de Calatrava Volcanic Field (central Spain): Fluid geochemistry in a CO2-rich area

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