Fossil chemical-physical (dis)equilibria between paleofluids and host rocks and their relationship to the seismic cycle and earthquakes

Curzi, M.; Aldega, L.; Billi, A.; Boschi, C.; Carminati, E.; Vignaroli, G.; Viola, G.; Bernasconi, S.M.

doi:10.1016/j.earscirev.2024.104801

Cited by 8 publications

(1 citation statement)

References 237 publications

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“…The first scenario to which this study applies is the impact of CO 2 -charged fluid flow on internal structures and compaction behaviors in carbonate fault zones throughout the seismic cycle (e.g., Curzi et al, 2024). Typically, during the co-seismic process, severe fracture cataclasis results in the formation of granular gouge materials with wide grain size distributions.…”

Section: Implications For Evolutions Of Fault Structures During Seism...mentioning

confidence: 99%

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO₂‐Rich Fluids

Duan,

Chen

2024

JGR Solid Earth

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To investigate the impact of CO2‐rich fluids on compaction behaviors and transport properties in carbonate fault zones, we conducted compaction‐coupled fluid flow experiments with CO2‐rich fluids percolating precompacted calcite aggregates. Our findings reveal distinct responses among samples subjected to different fluid conditions. Specifically, samples exposed to dry conditions exhibited negligible compaction strain, while those under wet‐closed conditions displayed relatively minor strain. In contrast, samples subjected to flow‐through conditions demonstrated significant compaction strain, with strain rates higher by 2–3 orders of magnitude than closed conditions due to enhanced pressure solution, subcritical cracking, and chemical dissolution. Strain rate, permeability, and grain size distribution exhibited spontaneous variations in response to fluid flow and compaction. Microstructures and mechanical and transport data suggest that deformation during the initial infiltration of CO2‐rich fluids was dominated by subcritical cracking, followed by pressure solution as grain size evolved, which resulted in compaction and reduced permeability. The persistent infiltration of CO2‐rich fluids further enhanced inhomogeneous dissolution‐precipitation with preferred dissolution channels serving as fluid pathways. The re‐precipitations may cement fault rocks and form low permeability seals, resulting in anisotropic fluid flow and localized fluid pressure in fault zones. As applied to nature, our results provide experimental evidence for the evolution of internal structures and transport behaviors, shedding important light on the mechanisms and sealing potential of carbonate faults in response to the infiltration of CO2‐rich fluids during the post‐seismic and inter‐seismic processes.

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Section: Implications For Evolutions Of Fault Structures During Seism...mentioning

confidence: 99%

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO₂‐Rich Fluids

Duan,

Chen

2024

JGR Solid Earth

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Interplay and feedback between tectonic regime, faulting, sealing horizons, and fluid flow in a hydrocarbon-hosting extensional basin: The Val d'Agri Basin case, Southern Italy

Schirripa Spagnolo,

Bernasconi,

Aldega

et al. 2024

Earth and Planetary Science Letters

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Tracing a Mantle Component in Both Paleo and Modern Fluids Along Seismogenic Faults of Southern Italy

Zummo,

Agosta,

Álvarez‐Valero

et al. 2024

Geochem Geophys Geosyst

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Aiming at understanding the source of the fluids that mineralizing within seismically active fault zones, we investigate the noble gas isotopes (i.e., helium (He), neon (Ne), and argon (Ar)) in the fluid inclusions (FIs) trapped in the calcite veins sampled along high‐angle fault zones of the Contursi hydrothermal basin, southern Italy. The latter basin lies in close vicinity of the MW = 6.9, 1980 Irpinia earthquake and exposes numerous fault scarps dissecting Mesozoic shallow‐water carbonates. The analyses of noble gases (He, Ne, Ar) are conducted to identify the origin of the volatiles circulating along the faults at the time of calcite precipitation. Then, outcomes of this discussions are compared with currently outgassing of deep‐sourced CO2 coupled to mantle‐derived He in that area, whose output is larger than those from some volcanic areas worldwide. The results indicate that He in FIs is dominated by a crustal radiogenic component (4He), and by an up to 20% of a mantle‐derived component (3He), with a highest isotopic signature of 1.38 Ra. This value is consistent with the highest percentage of mantle‐derived He associated to high‐flux CO2 gas emission in the investigated area (1.41 Ra). We propose that the variability of the He isotopic signature measured in primary FIs can result from early trapping of fluid inclusions or post trapping processes and seismic activity that modify the pristine He isotopic signature (i.e., derived from the crust and/or mantle) in groundwater along the faults during periods of background seismicity. Such investigations are fundamental to understand fluid migration in fault systems and the role of fluids in processes of earthquake nucleation.

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Fossil chemical-physical (dis)equilibria between paleofluids and host rocks and their relationship to the seismic cycle and earthquakes

Cited by 8 publications

References 237 publications

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO₂‐Rich Fluids

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO₂‐Rich Fluids

Interplay and feedback between tectonic regime, faulting, sealing horizons, and fluid flow in a hydrocarbon-hosting extensional basin: The Val d'Agri Basin case, Southern Italy

Tracing a Mantle Component in Both Paleo and Modern Fluids Along Seismogenic Faults of Southern Italy

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Fossil chemical-physical (dis)equilibria between paleofluids and host rocks and their relationship to the seismic cycle and earthquakes

Cited by 8 publications

References 237 publications

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO2‐Rich Fluids

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO2‐Rich Fluids

Interplay and feedback between tectonic regime, faulting, sealing horizons, and fluid flow in a hydrocarbon-hosting extensional basin: The Val d'Agri Basin case, Southern Italy

Tracing a Mantle Component in Both Paleo and Modern Fluids Along Seismogenic Faults of Southern Italy

Contact Info

Product

Resources

About

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO₂‐Rich Fluids

Compaction Creep and Evolution of Transport Properties of Carbonate Fault Gouges During the Percolation of CO₂‐Rich Fluids