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Metadata Files

Data Publication

Experimental data on scaled analogue experiments modelling GPS velocity field variations and kinematic partitioning in the Southern Andes (34°S to 42°S)

Eisermann, Jan Oliver | Göllner, Paul Leon | Riller, Ulrich

GFZ Data Services

(2021)

Descriptions

The southern Andes are regarded as a typical subduction orogen formed by oblique plate convergence. Despite decades of studies, there is considerable uncertainty as to how deformation is kinematically partitioned in the upper plate. Using scaled analogue experiments modelling, we test the concept of dextral transpression for this orogen. We advocate that the GPS velocity field portrays interseismic deformation related to deformation of strong crust north, and weak crust south, of 37°S. Contrary to the popular hypotheses that the Liquiñe-Ofqui Fault Zone, a prominent intra-arc deformation zone, takes up most of the plate boundary-parallel dextral strike-slip, we find that dextral transpression affects the entire model orogen through tectonic segmentation of crust. Moreover, prominent, regularly spaced sinistral oblique-slip thrust faults, interpreted as antithetic Riedel shears, developed spontaneously in all of our experiments and call into question the general believe that their NW-striking natural equivalents formed from pre-Andean discontinuities. Our experiments prompt us to reconsider the apparently well-established geodynamic concept that strain and margin-parallel displacement is localized on a few margin-parallel faults in the southern Andes.

Keywords


Originally assigned keywords
GPS velocity field
kinematic partitioning
Strain partitioning
Southern Andes
Transpression
oblique plate convergence
analogue experiment
modeling
Liquiñe-Ofqui Fault Zone
interseismic deformation
Multibox
EPOS
European Plate Observing System
multi-scale laboratories
analogue models of geologic processes
analog modelling results
Digital Image Correlation (DIC) / Particle Image Velocimetry (PIV) > StrainMaster (La Vision GmbH)
EARTH SCIENCE > SOLID EARTH > GEODETICS
EARTH SCIENCE > SOLID EARTH > TECTONICS > PLATE TECTONICS > STRAIN
EARTH SCIENCE SERVICES > MODELS > GEOLOGIC/TECTONIC/PALEOCLIMATE MODELS
fault > oblique slip fault
fault > strike-slip fault
geologic process
Glass/Plexiglas box > Glass/Plexiglas box (meter scale)
Microspheres > Glassy
normal fault
Sand > Corundum Sand
Sand > Quartz Sand
Sandbox > Sandbox (meter scale)
Shear box
Silicon/Silly putty/PDMS
Squeeze box
Surface image
tectonic and structural features
tectonic process > orogenic process
tectonic setting > back arc setting
tectonic setting > plate margin setting > active continental margin setting
tectonic setting > plate margin setting > volcanic arc setting
Time lapse camera

Corresponding MSL vocabulary keywords
strain partitioning
transpressional basin
normal fault
shear box
model surface monitoring (2D)
camera

MSL enriched keywords
Measured property
strain
strain partitioning
tectonic plate boundary
transcurrent tectonic plate boundary
transpressional basin
tectonic deformation structure
tectonic fault
normal fault
Apparatus
analogue modelling
deformation experiments
shear box
Ancillary equipment
model surface monitoring (2D)
camera
Inferred deformation behavior
deformation behaviour
localized deformation
Riedel shear
Measured property
strain
convergent tectonic plate boundary
continental collision
orogen
subduction
thrust fault
tectonic shear zone
Riedel shear

MSL enriched sub domains i

rock and melt physics
analogue modelling of geologic processes

Source

https://dataservices.gfz-potsdam.de/panmetaworks/showshort.php?id=8e932cac-b735-11eb-9603-497c92695674

Source publisher

GFZ Data Services


DOI

10.5880/fidgeo.2021.023


Creators

Eisermann, Jan Oliver

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany

ORCID:

https://orcid.org/0000-0002-3350-0445

Göllner, Paul Leon

Universität Hamburg, Hamburg, Germany

Riller, Ulrich

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany

ORCID:

https://orcid.org/0000-0002-3803-6792


Contributors

Eisermann, Jan Oliver

Researcher

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany

ORCID:

https://orcid.org/0000-0002-3350-0445

Göllner, Paul Leon

Researcher

Universität Hamburg, Hamburg, Germany

Riller, Ulrich

ContactPerson

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany

ORCID:

https://orcid.org/0000-0002-3803-6792

Riller, Ulrich

Supervisor

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany

ORCID:

https://orcid.org/0000-0002-3803-6792

Analogue Modelling Laboratory (University Hamburg, Germany)

HostingInstitution

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany

Riller, Ulrich

ContactPerson

Universität Hamburg, Bundesstrasse 55, 20146 Hamburg, Germany


References


Citation

Eisermann, J. O., Göllner, P. L., & Riller, U. (2021). Experimental data on scaled analogue experiments modelling GPS velocity field variations and kinematic partitioning in the Southern Andes (34°S to 42°S) [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2021.023


Dates

Created:

2021-04-20

Issued:

2021


Funding References

Funder name: German Science Foundation

Funder identifier: 10.13039/501100001659

Funder identifier type: Other

Award number: 355640964

Award title: Volcano-tectonics under intra-arc transpression


Rights

Creative Commons Attribution 4.0 International


Spatial coordinates