Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica
The McMurdo Dry Valleys magmatic system, Antarctica, provides a world-class example of pervasive lateral magma flow on a continental scale. The lowermost intrusion (Basement Sill) offers detailed sections through the now frozen particle microstructure of a congested magma slurry. We simulated the fl...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:102358 2023-07-02T03:30:42+02:00 Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica Petford, Nick Mirhadizadeh, Seyed 2017-05-05T15:19:00.000+02:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-av-qyfk https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:102358 unknown doi:10.5061/dryad.sn69s/1 doi:10.1098/rsos.161083 http://nbn-resolving.org/urn:nbn:nl:ui:13-av-qyfk doi:10.5061/dryad.sn69s https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:102358 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2017 ftdans https://doi.org/10.5061/dryad.sn69s/110.1098/rsos.16108310.5061/dryad.sn69s 2023-06-13T13:28:25Z The McMurdo Dry Valleys magmatic system, Antarctica, provides a world-class example of pervasive lateral magma flow on a continental scale. The lowermost intrusion (Basement Sill) offers detailed sections through the now frozen particle microstructure of a congested magma slurry. We simulated the flow regime in two and three dimensions using numerical models built on a finite-element mesh derived from field data. The model captures the flow behaviour of the Basement Sill magma over a viscosity range of 1–104 Pa s where the higher end (greater than or equal to 102 Pa s) corresponds to a magmatic slurry with crystal fractions varying between 30 and 70%. A novel feature of the model is the discovery of transient, low viscosity (less than or equal to 50 Pa s) high Reynolds number eddies formed along undulating contacts at the floor and roof of the intrusion. Numerical tracing of particle orbits implies crystals trapped in eddies segregate according to their mass density. Recovered shear strain rates (10−3–10−5 s−1) at viscosities equating to high particle concentrations (around more than 40%) in the Sill interior point to shear-thinning as an explanation for some types of magmatic layering there. Model transport rates for the Sill magmas imply a maximum emplacement time of ca 105 years, consistent with geochemical evidence for long-range lateral flow. It is a theoretically possibility that fast-flowing magma on a continental scale will be susceptible to planetary-scale rotational forces. Other/Unknown Material Antarc* Antarctica McMurdo Dry Valleys Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) McMurdo Dry Valleys |
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Open Polar |
collection |
Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
spellingShingle |
Life sciences medicine and health care Petford, Nick Mirhadizadeh, Seyed Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica |
topic_facet |
Life sciences medicine and health care |
description |
The McMurdo Dry Valleys magmatic system, Antarctica, provides a world-class example of pervasive lateral magma flow on a continental scale. The lowermost intrusion (Basement Sill) offers detailed sections through the now frozen particle microstructure of a congested magma slurry. We simulated the flow regime in two and three dimensions using numerical models built on a finite-element mesh derived from field data. The model captures the flow behaviour of the Basement Sill magma over a viscosity range of 1–104 Pa s where the higher end (greater than or equal to 102 Pa s) corresponds to a magmatic slurry with crystal fractions varying between 30 and 70%. A novel feature of the model is the discovery of transient, low viscosity (less than or equal to 50 Pa s) high Reynolds number eddies formed along undulating contacts at the floor and roof of the intrusion. Numerical tracing of particle orbits implies crystals trapped in eddies segregate according to their mass density. Recovered shear strain rates (10−3–10−5 s−1) at viscosities equating to high particle concentrations (around more than 40%) in the Sill interior point to shear-thinning as an explanation for some types of magmatic layering there. Model transport rates for the Sill magmas imply a maximum emplacement time of ca 105 years, consistent with geochemical evidence for long-range lateral flow. It is a theoretically possibility that fast-flowing magma on a continental scale will be susceptible to planetary-scale rotational forces. |
author |
Petford, Nick Mirhadizadeh, Seyed |
author_facet |
Petford, Nick Mirhadizadeh, Seyed |
author_sort |
Petford, Nick |
title |
Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica |
title_short |
Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica |
title_full |
Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica |
title_fullStr |
Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica |
title_full_unstemmed |
Data from: Image based modelling of lateral magma flow: the Basement Sill, Antarctica |
title_sort |
data from: image based modelling of lateral magma flow: the basement sill, antarctica |
publishDate |
2017 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-av-qyfk https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:102358 |
geographic |
McMurdo Dry Valleys |
geographic_facet |
McMurdo Dry Valleys |
genre |
Antarc* Antarctica McMurdo Dry Valleys |
genre_facet |
Antarc* Antarctica McMurdo Dry Valleys |
op_relation |
doi:10.5061/dryad.sn69s/1 doi:10.1098/rsos.161083 http://nbn-resolving.org/urn:nbn:nl:ui:13-av-qyfk doi:10.5061/dryad.sn69s https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:102358 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.sn69s/110.1098/rsos.16108310.5061/dryad.sn69s |
_version_ |
1770274986615898112 |