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Olsen, L.M., G. Major, K. Shein, J. Scialdone, S. Ritz, T. Stevens, M. Morahan, A. Aleman, R. Vogel, S. Leicester, H. Weir, M. Meaux, S. Grebas, C.Solomon, M. Holland, T. Northcutt, R. A. Restrepo, R. Bilodeau, 2013. NASA/Global Change Master Directory (GCMD) Earth Science Keywords. Version 8.0.0.0.0 ← back Released Dataset Frictional and microanalytical data of basalts sheared with pressurized H2O- and CO2- rich fluids Cite as: Copy citation to clipboard Giacomel, Piercarlo; Spagnuolo, Elena; Nazzari, Manuela; Marzoli, Andrea; Passelegue, François; Youbi, Nasrrddine; Di Toro, Giulio (2018): Frictional and microanalytical data of basalts sheared with pressurized H2O- and CO2- rich fluids. GFZ Data Services. https://doi.org/10.5880/fidgeo.2018.013 Status I N R E V I E W : Giacomel, Piercarlo; Spagnuolo, Elena; Nazzari, Manuela; Marzoli, Andrea; Passelegue, François; Youbi, Nasrrddine; Di Toro, Giulio (2018): Frictional and microanalytical data of basalts sheared with pressurized H2O- and CO2- rich fluids. GFZ Data Services. https://doi.org/10.5880/fidgeo.2018.013
Abstract Here we report the raw data of the friction experiments performed on basalt-built faults pressurized with de-ionized H2O, pure CO2, pure Ar, and H2O+CO2 mixtures, respectively (Dataset_friction_basalts.zip). The experiments were designed to assess the effects of the fluid chemistry on fault reactivation in faults juxtaposing basalts with different state of hydrothermal alteration. The experiments setup and data are further described in Giacomel et al (2018) to which these data are supplementary material.
Laboratory faults were deformed at a constant normal stress over the range from 10 to 20 MPa, at a shear stress of 5 MPa and a starting fluid pressure from 0.5 to 5 MPa. Fluid pressure was increased stepwise of 0.1 MPa/100 s up to induce macroscopic frictional instability, i.e. the equivalent to a main shock in nature.
Our mechanical data point to the paucity of any significant chemical weakening due to fluid-rock interation, regardless of the composition of the injected fluid and the degree of hydrothermal alteration of basalts. Moreover, microRaman investigation evidenced a few carbonate patches at the end of the tests performed in H2O+CO2 mixtures (Dataset_raman_calcite_s1018.txt and Dataset_raman_dolomite_s1018.txt).
Authors Giacomel, Piercarlo ;Sapienza University of Rome, Rome, ItalySpagnuolo, Elena ;Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, ItalyNazzari, Manuela;Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, Italy Marzoli, Andrea;University of Padua, Padua, Italy Passelegue, François;École polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland Youbi, Nasrrddine ;Cadi Ayyad University, Marrakech, MaroccoDi Toro, Giulio ;University of Padua, Padua, ItalyContact Contributors HP-HT Laboratory of Experimental Volcanolgy and Geophysics (INGV, Italy); Giacomel Piercarlo
Keywords CO2 storage in basalts, Induced seismicity, Role of fluid pressure on fault reactivation, Basalt carbonation, EPOS, multi-scale laboratories, rock and melt physical properties, basalt, Rock, Friction, Rotary Shear, Strain gauge , Friction, Rock, Rotary Shear, Strain gauge, basalt
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Laboratory faults were deformed at a constant normal stress over the range from 10 to 20 MPa, at a shear stress of 5 MPa and a starting fluid pressure from 0.5 to 5 MPa. Fluid pressure was increased stepwise of 0.1 MPa/100 s up to induce macroscopic frictional instability, i.e. the equivalent to a main shock in nature.
Our mechanical data point to the paucity of any significant chemical weakening due to fluid-rock interation, regardless of the composition of the injected fluid and the degree of hydrothermal alteration of basalts. Moreover, microRaman investigation evidenced a few carbonate patches at the end of the tests performed in H2O+CO2 mixtures (Dataset_raman_calcite_s1018.txt and Dataset_raman_dolomite_s1018.txt).
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