The high pCO2 Caprese Reservoir (Northern Apennines, Italy): Relationships between present- and paleo-fluid geochemistry and structural setting

Bicocchi, Gabriele; Tassi, Franco; Bonini, Marco; Capecchiacci, Francesco; Ruggieri, Giovanni; Buccianti, Antonella; Burgassi, P.D.; Vaselli, Orlando

doi:10.1016/j.chemgeo.2013.05.001

Cited by 13 publications

(6 citation statements)

References 107 publications

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“…Cinf (gray field) and cutoff-warning Cext thresholds (arrows) are shown for comparison (see main text for details; Chiodini et al, 2000;Frondini et al, 2018;Martini, 2016) along with the inferred desorption triggering value (Cext = 0.007 mol; Figure 3). In (b), the dashed curve represents the pH-Cext exponential best fit of a high CO 2 water issuing from a deep borehole in the Northern Apennine watershed (Bicocchi et al, 2013). The deep borehole draws fluid from a reservoir in the Upper Triassic rocks (Bicocchi et al, 2013).…”

Section: 1029/2018gc008117mentioning

confidence: 99%

“…In (b), the dashed curve represents the pH‐Cext exponential best fit of a high CO 2 water issuing from a deep borehole in the Northern Apennine watershed (Bicocchi et al, ). The deep borehole draws fluid from a reservoir in the Upper Triassic rocks (Bicocchi et al, ). In this case, the equilibria between dissolved constituents and gases are first calculated at the temperature and pressure values at depth ( T = 120 °C and P = 69 MPa).…”

Section: Modeling Pre‐seismic and Co‐seismic Geochemical Processesmentioning

confidence: 99%

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CO₂ Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

Boschetti

Barbieri

Barberio

et al. 2019

Geochem Geophys Geosyst

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The 2016 Mw ≥ 6.0 Amatrice‐Norcia earthquakes (central Apennines, Italy) and the related seismic sequence were associated with increases in arsenic and vanadium concentrations recorded in groundwater springs a few months before the earthquakes occurred. To evaluate these signals as reliable seismic precursors and effective predictive tools, we studied the geochemical processes that caused these anomalies. Using chemical and isotope models, we show that increased concentrations of arsenic and vanadium, a slight increase in boron concentrations, and a concomitant lowering of the boron isotope ratio may be due to mineral desorption (e.g., from iron oxides and/or clays). We argue that a displacing effect on the trace elements sorbed on minerals was triggered by an excess of deep CO2 in groundwater, which occurred prior to the main seismic event as a result of preseismic crustal dilation. Our observations confirm the pivotal role of CO2 in the release of trace elements by alteration of solid phases and provide a new understanding of earthquake‐related water chemical anomalies.

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Section: 1029/2018gc008117mentioning

confidence: 99%

Section: Modeling Pre‐seismic and Co‐seismic Geochemical Processesmentioning

confidence: 99%

CO₂ Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

Boschetti

Barbieri

Barberio

et al. 2019

Geochem Geophys Geosyst

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“…From bottom to top, we find the Paleogene-Mesozoic layer, consisting of an Early Jurassic carbonate platform, overlain by pelagic limestones with subordinated marly levels (Jurassic-Oligocene) and evaporites (Late Triassic), constituted by alternating layers of anhydrites and dolomites (Burano formation). In well Pieve Santo Stefano 1, the Burano formation is interbedded with calcalkaline andesitic volcanic products (Anelli et al, 1994;Heinicke et al, 2006;Bicocchi et al, 2013), whereas in Mt. Civitello 1 and Varoni 1 wells, this formation is made up by a sequence of alternating sulphates (anhydrites and gypsum) and dolostones (e.g.…”

Section: Geological Setting and Thermal Datamentioning

confidence: 99%

Conductive heat flow pattern of the central-northern Apennines, Italy

Verdoya

Chiozzi²,

Gola³

et al. 2019

ijthfa

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We analyzed thermal data from deep oil exploration and geothermal boreholes in the 1000-7000 m depth range to unravel thermal regime beneath the central-northern Apennines chain and the surrounding sedimentary basins. We particularly selected deepest bottom hole temperatures, all recorded within the permeable carbonate Paleogene-Mesozoic formations, which represent the most widespread tectono-stratigraphic unit of the study area. The available temperatures were corrected for the drilling disturbanceand the thermal conductivity was estimated from detailed litho-stratigraphic information and by taking into account the pressure and temperature effect. The thermal resistance approach, including also the radiogenic heat production, was used to infer the terrestrial heat flow and to highlight possible advective perturbation due to groundwater circulation. Only two boreholes close to recharge areas argue for deep groundwater flow in the permeable carbonate unit, whereas most of the obtained heat-flow data may reflect the deep, undisturbed, conductive thermal regime.

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“…Numerous studies of seep systems in Italy have highlighted the role of buried geological structures in Mesozoic carbonates on CO 2 accumulation and leakage to the surface. These include shallow (~1 km) or deep (~5 km) anticlines [14,19,31] and horsts [32], but CO 2 accumulations also occur in shallow pockets within Pleistocene sands [33,34]. CO 2 delivery to and from these structures tends to be fault associated [35][36][37].…”

Section: Geofluidsmentioning

confidence: 99%

Geospatial Statistics Elucidate Competing Geological Controls on Natural CO₂ Seeps in Italy

et al. 2019

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Site selection for the geological storage of CO2 for long timespans requires an understanding of the controls on containment, migration, and surface seepage of subsurface CO2 fluids. Evidence of natural CO2 migration from depth to the surface is documented at 270 sites from Italy, a prolific CO2 province. Previous studies indicate that CO2 delivery to and from buried structures that host CO2 accumulations is fault controlled but competing controls on the CO2 flow pathways affect the location and style of CO2 release. Here, we conduct a meta-analysis using a novel geospatial approach to statistically determine the relationship between the geological setting and structures and the CO2 seep spatial distribution and characteristics (morphological type, flux, and temperature) in Central Italy. We find that seep distribution differs on two spatial scales corresponding to the geological setting. On large scales (>5 km), seeps are isotropically distributed and align with regional structures such as anticlines, decollements, and extensional faults. On local scales (<5 km), seeps cluster and align with subsidiary geologic structures, including faults and lithological boundaries. The detailed location and flux of seeps within clusters are influenced by the regional structural domain: in the Tyrrhenian, seeps tend to be located along fault traces, whereas seeps are located as springs in the tip and ramp regions of fault scarps in the Apennines. Thus, our geospatial approach evidences, at a regional scale, how macrocrustal fluid flow is governed by deep extensional and compressional features but once CO2 reaches shallower structures, it evidences how smaller scale features and hydrogeological factors distribute the CO2 fluids in the near surface, dependent on the geological setting. This work not only demonstrates useful application of a novel geospatial approach to characterize competing crustal controls on CO2 flow at different scales but also informs the design of appropriate site characterization and surface monitoring programs at engineered carbon stores.

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The high pCO2 Caprese Reservoir (Northern Apennines, Italy): Relationships between present- and paleo-fluid geochemistry and structural setting

Cited by 13 publications

References 107 publications

CO₂ Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

CO₂ Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

Conductive heat flow pattern of the central-northern Apennines, Italy

Geospatial Statistics Elucidate Competing Geological Controls on Natural CO₂ Seeps in Italy

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The high pCO2 Caprese Reservoir (Northern Apennines, Italy): Relationships between present- and paleo-fluid geochemistry and structural setting

Cited by 13 publications

References 107 publications

CO2 Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

CO2 Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

Conductive heat flow pattern of the central-northern Apennines, Italy

Geospatial Statistics Elucidate Competing Geological Controls on Natural CO2 Seeps in Italy

Contact Info

Product

Resources

About

CO₂ Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

CO₂ Inflow and Elements Desorption Prior to a Seismic Sequence, Amatrice‐Norcia 2016, Italy

Geospatial Statistics Elucidate Competing Geological Controls on Natural CO₂ Seeps in Italy