Determining the origin of carbon dioxide and methane in the gaseous emissions of the San Vittorino plain (Central Italy) by means of stable isotopes and noble gas analysis

Giustini, Francesca; Blessing, Michaela; Brilli, Mauro; Lombardi, S.; Voltattorni, N.; Wîdory, David

doi:10.1016/j.apgeochem.2013.02.015

Cited by 19 publications

(12 citation statements)

References 71 publications

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“…Research is done from a variety of aspects, but it is generally important to determine the origin of CO 2 (whether it has come from a magma source, the Earth's mantle, the deep or shallow Earth core, decarbonation processes of carbonates making up the Earth core, regional metamorphism of carbonate rocks, contact metamorphism of carbonates, whether the source is organic etc.) An interesting example is presented by Giustini et al 2013, where through all-encompasing research of the chemistry and the isotope relationship of He, C ( 13 C) and H (D) in emanations along faults in the San Vittorino valley it was determined that 75% of the CO 2 originated from termometamorphic reactions of limestones, between 6 and 22% -from sediment deposits rich in organic matter, and from 0 to 6% from the mantle [5]. In a number of tested samples taken from the most significant fault area, the content of CO 2 originating from Earth's mantle was 24-42%.…”

Section: Needs and Directions Of Future Geological Research At The Dumentioning

confidence: 99%

Duvalo a Geological Phenomenon Near Ohrid

Markoski¹,

Jovanovski²,

Peshevski³

2019

AGB

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The phenomenon Duvalo in the vicinity of Ohrid has always been subject of interest among scientist and the general public. All geological manifestations occurring at this locality are a constant challenge for anyone attempting to research or explain them. So far, some researchers consider this structure is representing a solfatara while others consider it a mofette or fumarole. There are even articles in newspapers stating it represents the only "active volcano" on the Balkan Peninsula. With the aim to clarify some important facts for the location and eliminate the multitude of arbitrary and unprofessional interpretations and information, within the frame of this article are presented results of analysis of all the available geological and geomorphological existing documentation for the phenomenon. Based on such detailed analysis with taking into consideration the character of its activity, the composition and the measured temperature of the gasses, geomorphological futures etc., the occurrence is classified as a "dry moffete". The presence of the H2S gas in mofettes appearing on non-magmatic regions is very unusual and requires further research. Therefore, at the end of the paper are presented the minimum required investigations which will help define the origin of gasses at the Duvalo occurrence.

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Section: Needs and Directions Of Future Geological Research At The Dumentioning

confidence: 99%

Duvalo a Geological Phenomenon Near Ohrid

Markoski¹,

Jovanovski²,

Peshevski³

2019

AGB

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“…The data indicates that the leaking CO 2 does not reflect the isotopologue composition of the original CO 2 formed at depth. Although some of the CO 2 at the San Vittorino site may have derived from methane oxidation at the surface, the majority of the CO 2 at all sites has leaked from a deep, considerably hot (>150°C) reservoir [14,15]. The main reason for the resetting of the 47 signal is thus the re-equilibration of CO 2 with groundwater along its flow path.…”

Section: Resultsmentioning

confidence: 99%

Innovative Tools for Rapidly Mapping/Quantifying CO2 Leakage and Determining its Origin

et al. 2019

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Although deployment of onshore CO 2 storage will be crucial to reach the EU's ambitious goal of an 80% reduction in greenhouse gas emissions by 2050, some stakeholders are concerned about potential risks if CCS is situated on land near populated areas. The EU-funded, Horizon 2020 project ENOS (ENabling Onshore CO 2 Storage in Europe) is addressing many of these concerns about onshore storage by demonstrating best practices through pilot-scale projects and field laboratories, integrating CO 2 storage in local economic activities, and creating a favorable environment through public engagement, knowledge sharing and capacity building/training. As part of this work, ENOS is using sites where natural, geologically produced CO 2 is leaking to the surface, to test innovative monitoring tools and to better understand gas migration pathways and early warning signs that could be detected in the unlikely event of CO 2 leakage. At least four natural leakage sites are being used in central Italy, including the well-known Latera caldera as well as San Vittorino valley, Ailano, and Fiumicino. All sites exhibit the leakage of almost pure CO 2 along bedrock faults and through overlying sediments prior to release to the atmosphere, but each has unique characteristics related to the origin of the leaking gas, the composition of the local bedrock, depth to water table, soil properties, and ground surface conditions. Results from recent ENOS field campaigns at these sites are presented, focusing on data and interpretation related to i) large area, rapid leakage mapping and quantification tools; ii) innovative methods to determine the source of a CO 2 anomaly; iii) CO 2 leakage style as a function of near-surface conditions.

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“…In addition, spring locations and hydrogeochemistry are influenced by tectonics and the different permeabilities of the alluvial/clastic layers of the plain, having variable widths, up to approximately 200 m. Groundwater from carbonate aquifers can undergo chemicalphysical variations upon its transfer towards the alluvial shallow aquifer. Consequently, the springs of the area have different hydrogeochemical characteristics that are also the result of active degassing in the middle valley of the Velino River [31,36,38,39,43,65]. Hence, mixing induced by deep fluid inputs, whose upward movements occur along tectonic discontinuities and are partially buried by recent clastic deposits, may cause progressive and significant hydrogeochemical changes in the springs.…”

Section: Hydrogeological Settingmentioning

confidence: 99%

“…Although the San Vittorino Plain is far from having any evidence of active volcanism, it is characterized by relevant gas emissions, with a maximum CO 2 flux of 5.7 × 10 −5 kg m −2 d −1 [31,38,66]. In some cases, the aggressiveness of the waters conferred by gaseous contributions can promote the development of collapse phenomena, so-called sinkholes [67].…”

Section: Hydrogeological Settingmentioning

confidence: 99%

“…Research in this direction has mainly deepened the understanding of fluid origins, focusing on the determination of quantities useful to define their origin and mixing. In detail, some conservative elements in waters (e.g., As, V, Fe, Li, Cs, and Rb) and isotopes of some gaseous species (e.g., He and Ar) have been recognized and used as tracers that are often not bound to a circulation model [21,[30][31][32][33]. In this frame, the central Apennines mountain belt in central Italy represents a natural laboratory to efficiently examine these topics, both for its tectonicstructural framework [34], the abundance of groundwater resources [35], and the rise of deep fluids along normal faults [11][12][13]36,37].…”

Section: Introductionmentioning

confidence: 99%

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Understanding the Origin and Mixing of Deep Fluids in Shallow Aquifers and Possible Implications for Crustal Deformation Studies: San Vittorino Plain, Central Apennines

et al. 2021

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Expanding knowledge about the origin and mixing of deep fluids and the water–rock–gas interactions in aquifer systems can represent an improvement in the comprehension of crustal deformation processes. An analysis of the deep and meteoric fluid contributions to a regional groundwater circulation model in an active seismic area has been carried out. We performed two hydrogeochemical screenings of 15 springs in the San Vittorino Plain (central Italy). Furthermore, we updated the San Vittorino Plain structural setting with a new geological map and cross-sections, highlighting how and where the aquifers are intersected by faults. The application of Na-Li geothermometers, coupled with trace element and gas analyses, agrees in attributing the highest temperatures (>150 °C), the greatest enrichments in Li (124.3 ppb) and Cs (>5 ppb), and traces of mantle-derived He (1–2%) to springs located in correspondence with high-angle faults (i.e., S5, S11, S13, and S15). This evidence points out the role of faults acting as vehicles for deep fluids into regional carbonate aquifers. These results highlight the criteria for identifying the most suitable sites for monitoring variations in groundwater geochemistry due to the uprising of deep fluids modulated by fault activity to be further correlated with crustal deformation and possibly with seismicity.

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Determining the origin of carbon dioxide and methane in the gaseous emissions of the San Vittorino plain (Central Italy) by means of stable isotopes and noble gas analysis

Cited by 19 publications

References 71 publications

Duvalo a Geological Phenomenon Near Ohrid

Duvalo a Geological Phenomenon Near Ohrid

Innovative Tools for Rapidly Mapping/Quantifying CO2 Leakage and Determining its Origin

Understanding the Origin and Mixing of Deep Fluids in Shallow Aquifers and Possible Implications for Crustal Deformation Studies: San Vittorino Plain, Central Apennines

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