The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach
SUMMARY Greenland’s tectonic history is complex, and the resulting lithospheric structure is, although extensively researched, not well constrained. In this study, we model the lithospheric structure of Greenland in a consistent, integrated framework with three steps. First, we build a lithospheric...
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Oxford University Press (OUP)
2024
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Online Access: | http://dx.doi.org/10.1093/gji/ggae183 https://academic.oup.com/gji/advance-article-pdf/doi/10.1093/gji/ggae183/57830248/ggae183.pdf https://academic.oup.com/gji/article-pdf/238/2/719/58175247/ggae183.pdf |
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croxfordunivpr:10.1093/gji/ggae183 2024-06-23T07:53:12+00:00 The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach Wansing, A Ebbing, J Moorkamp, M Deutsche Forschungsgemeinschaft 2024 http://dx.doi.org/10.1093/gji/ggae183 https://academic.oup.com/gji/advance-article-pdf/doi/10.1093/gji/ggae183/57830248/ggae183.pdf https://academic.oup.com/gji/article-pdf/238/2/719/58175247/ggae183.pdf en eng Oxford University Press (OUP) https://creativecommons.org/licenses/by/4.0/ Geophysical Journal International volume 238, issue 2, page 719-741 ISSN 0956-540X 1365-246X journal-article 2024 croxfordunivpr https://doi.org/10.1093/gji/ggae183 2024-06-11T04:17:20Z SUMMARY Greenland’s tectonic history is complex, and the resulting lithospheric structure is, although extensively researched, not well constrained. In this study, we model the lithospheric structure of Greenland in a consistent, integrated framework with three steps. First, we build a lithospheric background model by forward modelling, adjusted to gravity gradient data and shear wave velocities from a regional tomography model. Subsequently, we jointly invert for the upper crustal density and susceptibility structure by minimizing the gravity residuals and magnetic total field anomaly misfit. The last modelling step searches for upper crustal thermal parameters to fit our model to the most recent geothermal heat flow predictions for Greenland. Finally, we present 3-D models of the density, temperature and velocity structure for the lithosphere as well as thermal parameters and susceptibilities for the upper crust. Our model also includes the depth of the Moho and LAB in Greenland. A comparison between inverted crustal parameters and surface geology shows a clear correlation. The novelty of our model is that all these results are consistent with each other and simultaneously explain a wide range of observed data. Article in Journal/Newspaper Greenland Oxford University Press Greenland Geophysical Journal International 238 2 719 741 |
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Open Polar |
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Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
description |
SUMMARY Greenland’s tectonic history is complex, and the resulting lithospheric structure is, although extensively researched, not well constrained. In this study, we model the lithospheric structure of Greenland in a consistent, integrated framework with three steps. First, we build a lithospheric background model by forward modelling, adjusted to gravity gradient data and shear wave velocities from a regional tomography model. Subsequently, we jointly invert for the upper crustal density and susceptibility structure by minimizing the gravity residuals and magnetic total field anomaly misfit. The last modelling step searches for upper crustal thermal parameters to fit our model to the most recent geothermal heat flow predictions for Greenland. Finally, we present 3-D models of the density, temperature and velocity structure for the lithosphere as well as thermal parameters and susceptibilities for the upper crust. Our model also includes the depth of the Moho and LAB in Greenland. A comparison between inverted crustal parameters and surface geology shows a clear correlation. The novelty of our model is that all these results are consistent with each other and simultaneously explain a wide range of observed data. |
author2 |
Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Wansing, A Ebbing, J Moorkamp, M |
spellingShingle |
Wansing, A Ebbing, J Moorkamp, M The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach |
author_facet |
Wansing, A Ebbing, J Moorkamp, M |
author_sort |
Wansing, A |
title |
The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach |
title_short |
The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach |
title_full |
The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach |
title_fullStr |
The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach |
title_full_unstemmed |
The lithospheric structure of Greenland from a stepwise forward and inverse modelling approach |
title_sort |
lithospheric structure of greenland from a stepwise forward and inverse modelling approach |
publisher |
Oxford University Press (OUP) |
publishDate |
2024 |
url |
http://dx.doi.org/10.1093/gji/ggae183 https://academic.oup.com/gji/advance-article-pdf/doi/10.1093/gji/ggae183/57830248/ggae183.pdf https://academic.oup.com/gji/article-pdf/238/2/719/58175247/ggae183.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland |
genre_facet |
Greenland |
op_source |
Geophysical Journal International volume 238, issue 2, page 719-741 ISSN 0956-540X 1365-246X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1093/gji/ggae183 |
container_title |
Geophysical Journal International |
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238 |
container_issue |
2 |
container_start_page |
719 |
op_container_end_page |
741 |
_version_ |
1802644741587730432 |