Data Publication

Mechanical data of simulated basalt-built faults from rotary shear and direct shear experiments

GFZ Data Services

(2021)

Descriptions

Here we report the raw data of the friction experiments carried out on basalt-built simulated faults defined by rock-on-rock contacts and powdered gouge. The experiments were specifically designed to investigate the role of fault microstructure on the frictional properties of basalts and the fault slip stability, and were conducted with the rotary-shear apparatus (SHIVA) and the biaxial deformation apparatus (BRAVA), hosted at the National Institute of Geophysics and Volcanology (INGV) in Rome. Simulated faults were sheared at constant normal stress from 4 to 30 MPa. In SHIVA experiments, we deformed samples at constant slip velocity of 10 μm/s up to 56 mm net slip. In BRAVA tests we performed a sequence of velocity steps (0.1 to 300 μm/s), followed by slide-hold-slide tests (30-3000 s holds; V=10 μm/s slides). Our main results highlight the frictionally strong nature of basalt faults and show opposite friction velocity dependence upon the velocity upsteps: while fault gouges exhibit velocity weakening behavior with increasing normal stress and sliding velocity, bare rock surfaces transition to velocity strengthening behavior as we approach higher slip velocities. The experiments setup and data are further described in the manuscript “Frictional properties of basalt experimental faults and implications for volcano-tectonic settings and geo-energy sites” to which these data are supplementary material.

Keywords

Originally assigned keywords

Fault mechanics

Friction of basalts

Rate and State Friction

Bare rock surfaces

Simulated fault gouge

EPOS

multi-scale laboratories

rock and melt physical properties

alkali-olivine_basalt

Biaxial

Friction

Rotary Shear

Strain gauge

Corresponding MSL vocabulary keywords

shear testing

rate and state friction (RSF) parameters

simulated fault gouge

biaxial compression apparatus

friction coefficient

frictional deformation

friction coefficient

rotary shear apparatus

MSL enriched keywords

Apparatus

deformation testing

shear testing

Measured property

friction - controlled slip rate

rate and state friction (RSF) parameters

Measured property

friction - controlled slip rate

rate and state friction (RSF) parameters

fault rock

fault gouge

simulated fault gouge

compression testing

biaxial compression apparatus

friction coefficient

Inferred deformation behavior

deformation behaviour

frictional deformation

friction coefficient

rotary shear apparatus

Apparatus

characterization of modelling material

frictional property determination

rotary shear apparatus

igneous rock - extrusive

basic extrusive

basalt

conventional triaxial apparatus: direct shear

reactivation friction coefficient

frictional strength recovery

reactivation friction coefficient

tectonic deformation structure

tectonic fault

Analyzed feature

deformation microstructure

brittle microstructure

fault microstructure

MSL enriched sub domains i

rock and melt physics

analogue modelling of geologic processes

microscopy and tomography

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=c2c77529-d6ec-11ea-9603-497c92695674

Source publisher

GFZ Data Services

DOI

10.5880/fidgeo.2020.035

Creators

Giacomel, Piercarlo

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0002-1553-7842

Ruggieri, Roberta

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0002-7051-4977

Scuderi, Marco Maria

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0001-5232-0792

Spagnuolo, Elena

National Institute of Geophysics and Volcanology, Rome, Italy

ORCID:

https://orcid.org/0000-0002-1377-5812

Di Toro, Giulio

Padua University, Padua, Italy | National Institute of Geophysics and Volcanology, Rome, Italy

ORCID:

https://orcid.org/0000-0002-6618-3474

Collettini, Cristiano

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0002-4828-2516

Contributors

Giacomel, Piercarlo

Researcher

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0002-1553-7842

Ruggieri, Roberta

Researcher

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0002-7051-4977

Scuderi, Marco Maria

Researcher

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0001-5232-0792

Spagnuolo, Elena

Researcher

National Institute of Geophysics and Volcanology, Rome, Italy

ORCID:

https://orcid.org/0000-0002-1377-5812

Di Toro, Giulio

Researcher

Padua University, Padua, Italy | National Institute of Geophysics and Volcanology, Rome, Italy

ORCID:

https://orcid.org/0000-0002-6618-3474

Collettini, Cristiano

Supervisor

Sapienza University of Rome, Rome, Italy

ORCID:

https://orcid.org/0000-0002-4828-2516

HP-HT Laboratory Of Experimental Volcanolgy And Geophysics (INGV, Italy)

HostingInstitution

INGV, Italy

labid:

2613a7211e1498423ed604baff8efef9

Giacomel, Piercarlo

ContactPerson

Sapienza University of Rome, Rome, Italy

References

10.1146/annurev.earth.26.1.643

10.1029/93jb03361

10.1016/j.tecto.2021.228883

Citation

Giacomel, P., Ruggieri, R., Scuderi, M. M., Spagnuolo, E., Di Toro, G., & Collettini, C. (2021). Mechanical data of simulated basalt-built faults from rotary shear and direct shear experiments [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2020.035

Dates

Issued:

2021

Funding References

Funder name: FP7 Ideas: European Research Council

Funder identifier: https://doi.org/10.13039/100011199

Funder identifier type: Crossref Funder ID

Award number: 614705

Award title: NOFEAR

Funder name: Collettini 2018

Award title: Progetti Ateneo La Sapienza

Rights

Creative Commons Attribution 4.0 International