Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes
At Saturn’s moon Enceladus, jets along four distinct fractures called ‘tiger stripes’ erupt ice crystals into a broad plume above the South Pole. The tiger stripes experience variations in tidally driven shear and normal traction as Enceladus orbits Saturn. Here, we use numerical finite-element mode...
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ftcaltechauth:oai:authors.library.caltech.edu:c6kkn-bbd63 2024-09-15T18:36:43+00:00 Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes Berne, Alexander Simons, Mark Keane, James T. Leonard, Erin J. Park, Ryan S. 2024-04-29 https://doi.org/10.1038/s41561-024-01418-0 https://rdcu.be/dGjUE eng eng Nature Publishing Group https://www.caltech.edu/about/news/enceladus-spills-its-guts-through-strikeslip-motion https://doi.org/10.1038/s41561-024-01418-0 oai:authors.library.caltech.edu:c6kkn-bbd63 issn:1752-0908 https://rdcu.be/dGjUE info:eu-repo/semantics/openAccess No commercial reproduction, distribution, display or performance rights in this work are provided. Nature Geoscience, (2024-04-29) info:eu-repo/semantics/article 2024 ftcaltechauth https://doi.org/10.1038/s41561-024-01418-0 2024-08-06T15:35:04Z At Saturn’s moon Enceladus, jets along four distinct fractures called ‘tiger stripes’ erupt ice crystals into a broad plume above the South Pole. The tiger stripes experience variations in tidally driven shear and normal traction as Enceladus orbits Saturn. Here, we use numerical finite-element modelling of a spherical ice shell subjected to tidal forces to show that this traction may produce quasi-periodic strike-slip motion in the Enceladus crust with two peaks in activity during each orbit. We suggest that friction modulates the response of tiger stripes to driving stresses, such that tidal traction on the faults results in a difference in the magnitudes of peak strike slip and delays the first peak in fault motion following peak tidal stress. The simulated double-peaked and asymmetric strike-slip motion of the tiger stripes is consistent with diurnal variations in jet activity inferred from Cassini spacecraft images of plume brightness. The spatial distribution of strike-slip motion also matches Cassini infrared observations of heat flow. We hypothesize that strike-slip motion can extend transtensional bends (for example, pull-apart structures) along geometric irregularities over the tiger stripes and thus modulate jet activity. Tidally driven fault motion may also influence longer term tectonic evolution near the South Pole of the satellite. © The Author(s), under exclusive licence to Springer Nature Limited 2024. This research was supported by the Future Investigators in NASA Earth and Space Science and Technology (FINESST) Program (80NSSC22K1318)(A.B., M.S.). We thank the Keck Institute for Space Studies (KISS) at the California Institute of Technology for organizing two workshops about ‘Next-Generation Planetary Geodesy’ which provided insight, expertise and discussions that inspired this research. We also thank M. Knepley, B. Aagaard and C. Williams for providing valuable advice on how to modify PyLith for our simulations. A portion of this research was supported by a Strategic Research and ... Article in Journal/Newspaper South pole Caltech Authors (California Institute of Technology) Nature Geoscience 17 5 385 391 |
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English |
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At Saturn’s moon Enceladus, jets along four distinct fractures called ‘tiger stripes’ erupt ice crystals into a broad plume above the South Pole. The tiger stripes experience variations in tidally driven shear and normal traction as Enceladus orbits Saturn. Here, we use numerical finite-element modelling of a spherical ice shell subjected to tidal forces to show that this traction may produce quasi-periodic strike-slip motion in the Enceladus crust with two peaks in activity during each orbit. We suggest that friction modulates the response of tiger stripes to driving stresses, such that tidal traction on the faults results in a difference in the magnitudes of peak strike slip and delays the first peak in fault motion following peak tidal stress. The simulated double-peaked and asymmetric strike-slip motion of the tiger stripes is consistent with diurnal variations in jet activity inferred from Cassini spacecraft images of plume brightness. The spatial distribution of strike-slip motion also matches Cassini infrared observations of heat flow. We hypothesize that strike-slip motion can extend transtensional bends (for example, pull-apart structures) along geometric irregularities over the tiger stripes and thus modulate jet activity. Tidally driven fault motion may also influence longer term tectonic evolution near the South Pole of the satellite. © The Author(s), under exclusive licence to Springer Nature Limited 2024. This research was supported by the Future Investigators in NASA Earth and Space Science and Technology (FINESST) Program (80NSSC22K1318)(A.B., M.S.). We thank the Keck Institute for Space Studies (KISS) at the California Institute of Technology for organizing two workshops about ‘Next-Generation Planetary Geodesy’ which provided insight, expertise and discussions that inspired this research. We also thank M. Knepley, B. Aagaard and C. Williams for providing valuable advice on how to modify PyLith for our simulations. A portion of this research was supported by a Strategic Research and ... |
format |
Article in Journal/Newspaper |
author |
Berne, Alexander Simons, Mark Keane, James T. Leonard, Erin J. Park, Ryan S. |
spellingShingle |
Berne, Alexander Simons, Mark Keane, James T. Leonard, Erin J. Park, Ryan S. Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes |
author_facet |
Berne, Alexander Simons, Mark Keane, James T. Leonard, Erin J. Park, Ryan S. |
author_sort |
Berne, Alexander |
title |
Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes |
title_short |
Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes |
title_full |
Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes |
title_fullStr |
Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes |
title_full_unstemmed |
Jet activity on Enceladus linked to tidally driven strike-slip motion along tiger stripes |
title_sort |
jet activity on enceladus linked to tidally driven strike-slip motion along tiger stripes |
publisher |
Nature Publishing Group |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41561-024-01418-0 https://rdcu.be/dGjUE |
genre |
South pole |
genre_facet |
South pole |
op_source |
Nature Geoscience, (2024-04-29) |
op_relation |
https://www.caltech.edu/about/news/enceladus-spills-its-guts-through-strikeslip-motion https://doi.org/10.1038/s41561-024-01418-0 oai:authors.library.caltech.edu:c6kkn-bbd63 issn:1752-0908 https://rdcu.be/dGjUE |
op_rights |
info:eu-repo/semantics/openAccess No commercial reproduction, distribution, display or performance rights in this work are provided. |
op_doi |
https://doi.org/10.1038/s41561-024-01418-0 |
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Nature Geoscience |
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17 |
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5 |
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385 |
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391 |
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