Frictional and microanalytical data of basalts sheared with pressurized H2O- and CO2- rich fluids

Giacomel, Piercarlo; Spagnuolo, Elena; Nazzari, Manuela; Marzoli, Andrea; Passelegue, François; Youbi, Nasrrddine; Di Toro, Giulio;

2018-06 || GFZ Data Services

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).









Originally assigned keywords

Corresponding MSL vocabulary keywords

MSL enriched keywords

Originally assigned sub domains
  • rock and melt physics
MSL enriched sub domains
  • rock and melt physics
  • analogue modelling of geologic processes
  • geochemistry
Source http://dx.doi.org/doi:10.5880/fidgeo.2018.013
Source publisher GFZ Data Services
DOI 10.5880/fidgeo.2018.013
License CC BY 4.0
Authors
  • Spagnuolo, Elena
  • 0000-0002-1377-5812
  • Istituto Nazionale di Geofisica e Vulcanologia (INGV), Rome, Italy
  • Nazzari, 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
References
  • Giacomel, P., Spagnuolo, E., Nazzari, M., Marzoli, A., Passelegue, F., Youbi, N., & Di Toro, G. (2018). Frictional Instabilities and Carbonation of Basalts Triggered by Injection of Pressurized H2O‐ and CO2‐ Rich Fluids. Geophysical Research Letters, 45(12), 6032–6041. Portico. https://doi.org/10.1029/2018gl078082
  • 10.1029/2018GL078082
  • IsSupplementTo
Contact
  • Giacomel Piercarlo
  • Sapienza University of Rome, Rome, Italy
  • piercarlo.giacomel@uniroma1.it
Citation Giacomel, P., Spagnuolo, E., Nazzari, M., Marzoli, A., Passelegue, F., Youbi, N., & Di Toro, G. (2018). Frictional and microanalytical data of basalts sheared with pressurized H2O- and CO2- rich fluids [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2018.013