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Metadata Files

Data Publication

Digital image correlation data from laboratory subduction megathrust models

Kosari, Ehsan | Rosenau, Matthias | Oncken, Onno

GFZ Data Services

(2022)

Descriptions

This data set includes digital image correlation data from analog earthquakes experiments. The data consists of grids of surface strain and time series of surface displacement (horizontal and vertical) and strain. The data have been derived using a stereo camera setup and processed with LaVision Davis 10 software. Detailed descriptions of the experiments and results regarding the surface pattern of the strain can be found in Kosari et al. (2022), to which this data set is supplementary. We use an analog seismotectonic scale model approach (Rosenau et al., 2019 and 2017) to generate a catalog of analog megathrust earthquakes (Table 1). The presented experimental setup is modified from the 3D setup used in Rosenau et al. (2019) and Kosari et al. ( 2020). The subduction forearc model wedge is set up in a glass-sided box (1000 mm across strike, 800mm along strike, and 300 mm deep) with a dipping, elastic basal conveyor belt and a rigid backwall. An elastoplastic sand-rubber mixture (50 vol.% quartz sandG12: 50 vol.% EPDM rubber) is sieved into the setup representing a 240 km long forearc segment from the trench to the volcanic arc. The shallow part of the wedge includes a basal layer of sticky rice grains characterized by unstable stick-slip sliding representing the seismogenic zone. Stick-slip sliding in rice is governed by a rate-and-state dependent friction law similar to natural rocks. According to Coulomb wedge theory (Dahlen et al., 1984), two types of wedge configurations have been designed: a “compressional” configuration represents an interseismically compressional and coseismically stable wedge (compressional configuration), and a “critical” configuration, which is interseismically stable (close to critically compressional) and may reach a critical extensional state coseismically (critical configuration). In the compressional configuration, a flat-top (surface slope α=0) wedge overlies a single large rectangular in map view stick-slip patch (Width*Length=200*800 mm) over a 15-degree dipping basal thrust. In the critical configuration, the surface angle of the elastoplastic wedge varies from the coastal segment onshore (α=10) to the inner-wedge offshore (α=15) segments over a 5-degree dipping basal thrust. Slow continuous compression of the wedge by moving the basal conveyor belt at a speed velocity of 0.05 mm/s simulates plate convergence and results in the quasi-periodic nucleation of quasi-periodic stick-slip events (analog earthquakes) within the rice layer. The wedge responds elastically to these basal slip events, similar to crustal rebound during natural subduction megathrust earthquakes.

Keywords


Originally assigned keywords
EPOS
multi-scale laboratories
analogue models of geologic processes
analogue modeling results
Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > StrainMaster (La Vision GmbH)
High frame rate camera
Time lapse camera
megathrust
Rubber
Sand > Quartz Sand
Subduction box
tectonic and structural features
tectonic process > subduction
tectonic setting > plate margin setting > active continental margin setting
tectonic setting > plate margin setting > subduction zone setting
EARTH SCIENCE > SOLID EARTH > GEOMORPHIC LANDFORMS/PROCESSES > TECTONIC PROCESSES > SUBDUCTION
EARTH SCIENCE > SOLID EARTH > TECTONICS > EARTHQUAKES

Corresponding MSL vocabulary keywords
high frame rate camera
camera
subducting plate interface
thrust fault
natural rubber
subduction box

MSL enriched keywords
Ancillary equipment
model surface monitoring (2D)
camera
high frame rate camera
tectonic plate boundary
convergent tectonic plate boundary
subduction
subducting plate interface
tectonic deformation structure
tectonic fault
thrust fault
analogue modelling material
elastic modelling material
natural elastic material
natural rubber
Apparatus
analogue modelling
deformation experiments
subduction box
Software
digital image correlation (DIC)
minerals
silicate minerals
tectosilicates
quartz
unconsolidated sediment
clastic sediment
sand
Apparatus
deformation testing
shear testing
Measured property
friction - controlled slip rate
friction coefficient
rate and state friction (RSF) parameters
strain
Inferred deformation behavior
deformation behaviour
brittle deformation
frictional deformation
Measured property
friction - controlled slip rate
friction coefficient
rate and state friction (RSF) parameters
strain
volcanic arc
trench
accretionary wedge
Earth's structure
Earth crust

MSL enriched sub domains i

analogue modelling of geologic processes
rock and melt physics

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=b1da2e17-b11a-11ec-a8b4-7d2338b1cdf0

Source publisher

GFZ Data Services


DOI

10.5880/fidgeo.2022.015


Creators

Kosari, Ehsan

GFZ German Research Centre for Geosciences, Potsdam, Germany | Department of Earth Sciences, Free University Berlin, Berlin, Germany

ORCID:

https://orcid.org/0000-0002-1052-4997

Rosenau, Matthias

GFZ German Research Centre for Geosciences, Potsdam, Germany

ORCID:

https://orcid.org/0000-0003-1134-5381

Oncken, Onno

GFZ German Research Centre for Geosciences, Potsdam, Germany | Department of Earth Sciences, Free University Berlin, Berlin, Germany

ORCID:

https://orcid.org/0000-0002-2894-480X


Contributors

HelTec-Helmholtz Laboratory For Tectonic Modelling (GFZ German Research Centre For Geosciences, Germany)

HostingInstitution

GFZ German Research Centre for Geosciences, Potsdam, Germany

labid:

9ba34c109b827b177aab36e0266b1643

Kosari, Ehsan

ContactPerson

GFZ German Research Centre for Geosciences, Potsdam, Germany


References

10.1029/2021tc007099

10.1016/j.jsg.2004.08.008

10.1029/2020gl088266

10.5194/se-8-597-2017

10.1029/2018jb016597


Citation

Kosari, E., Rosenau, M., & Oncken, O. (2022). Digital image correlation data from laboratory subduction megathrust models [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2022.015


Dates

Issued:

2022


Funding References

Funder name: Deutsche Forschungsgemeinschaft

Funder identifier: https://doi.org/10.13039/501100001659

Funder identifier type: Crossref Funder ID

Award number: CRC 1114

Award title: Scaling Cascades in Complex Systems

Funder name: Horizon 2020 Framework Programme

Funder identifier: https://doi.org/10.13039/100010661

Funder identifier type: Crossref Funder ID

Award number: Grant Agreement 674899

Award title: SUBITOP Marie Sklodowska-Curie Action project


Rights

Creative Commons Attribution 4.0 International