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Metadata Files

Data Publication

Experimental and model data of aggregate compaction by pressure solution

van den Ende, Martijn

GFZ Data Services

(2017)

Descriptions

Intergranular pressure solution creep is an important deformation mechanism in the Earth’s crust. The phenomenon has been frequently studied and several analytical models have been proposed that describe its constitutive behavior. These models require assumptions regarding the geometry of the aggregate and the grain size distribution in order to solve for the contact stresses, and often neglect shear tractions. Furthermore, analytical models tend to overestimate experimental compaction rates at low porosities, an observation for which the underlying mechanisms remain to be elucidated. Here we present a conceptually simple, 3D Discrete Element Method (DEM) approach for simulating intergranular pressure solution creep that explicitly models individual grains, relaxing many of the assumptions that are required by analytical models. The DEM model is validated against experiments by direct comparison of macroscopic sample compaction rates. Furthermore, the sensitivity of the overall DEM compaction rate to the grain size and applied stress is tested. The effects of the interparticle friction and of a distributed grain size on macroscopic strain rates are subsequently investigated. Overall, we find that the DEM model is capable of reproducing realistic compaction behavior, and that the strain rates produced by the model are in good agreement with uniaxial compaction experiments. Characteristic features, such as the dependence of the strain rate on grain size and applied stress, as predicted by analytical models, are also observed in the simulations. DEM results show that interparticle friction and a distributed grain size affect the compaction rates by less than half an order of magnitude. The zip-file Van-den-Ende_2017.018.zip contains several folders with raw data from the laboratory experiments, output data from Discrete Element Method simulations, and Python 2.7 script files that read and process these data. All data are stored in ASCII format.

Keywords


Originally assigned keywords
Compaction
Pressure solution
Discrete Element Method
Halite
Granular mechanics
EPOS
multi-scale laboratories
rock and melt physical properties

Corresponding MSL vocabulary keywords
strain
strain
rate of pressure solution
pressure solution
halite

MSL enriched keywords
Measured property
strain
Measured property
strain
coupled mechanical-chemical effects
rate of pressure solution
Inferred deformation behavior
microphysical deformation mechanism
time-dependent mechanism
pressure solution
minerals
halide minerals
halite
friction - controlled slip rate
friction coefficient
grain size distribution
deformation behaviour
frictional deformation
friction - controlled slip rate
friction coefficient
grain size distribution
Analyzed feature
grain size and configuration
grain size
grain size distribution

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=escidoc:2782913

Source publisher

GFZ Data Services


DOI

10.5880/fidgeo.2017.018


Creators

van den Ende, Martijn

Utrecht University

ORCID:

https://orcid.org/0000-0002-0634-7078


Contributors

van den Ende, Martijn

DataCollector

Utrecht University

ORCID:

https://orcid.org/0000-0002-0634-7078

Experimental Rock Deformation/HPT-Lab (Utrecht University, The Netherlands)

HostingInstitution

Utrecht University, The Netherlands


References

10.1002/2017jb014440


Citation

van den Ende, M. (2017). Experimental and model data of aggregate compaction by pressure solution [Data set]. GFZ Data Services. https://doi.org/10.5880/FIDGEO.2017.018


Dates

Created:

2017-11-24

Issued:

2017


Language

en


Funding References

Funder name: Nederlandse Organisatie voor Wetenschappelijk Onderzoek

Funder identifier: https://doi.org/10.13039/501100003246

Funder identifier type: Crossref Funder ID

Award number: 854.12.001


Rights

CC BY 4.0