Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland
Abstract Curie depths beneath Greenland are revealed by spectral analysis of data from the World Digital Magnetic Anomaly Map 2. A thermal model of the lithosphere then provides a corresponding geothermal heat flux map. This new map exhibits significantly higher frequency but lower amplitude variati...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2018-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2018GL078289 |
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| author | Yasmina M. Martos Tom A. Jordan Manuel Catalán Thomas M. Jordan Jonathan L. Bamber David G. Vaughan |
| author_facet | Yasmina M. Martos Tom A. Jordan Manuel Catalán Thomas M. Jordan Jonathan L. Bamber David G. Vaughan |
| author_sort | Yasmina M. Martos |
| collection | DOAJ |
| description | Abstract Curie depths beneath Greenland are revealed by spectral analysis of data from the World Digital Magnetic Anomaly Map 2. A thermal model of the lithosphere then provides a corresponding geothermal heat flux map. This new map exhibits significantly higher frequency but lower amplitude variation than earlier heat flux maps and provides an important boundary condition for numerical ice‐sheet models and interpretation of borehole temperature profiles. In addition, it reveals new geologically significant features. Notably, we identify a prominent quasi‐linear elevated geothermal heat flux anomaly running northwest–southeast across Greenland. We interpret this feature to be the relic of the passage of the Iceland hotspot from 80 to 50 Ma. The expected partial melting of the lithosphere and magmatic underplating or intrusion into the lower crust is compatible with models of observed satellite gravity data and recent seismic observations. Our geological interpretation has potentially significant implications for the geodynamic evolution of Greenland. |
| format | Article |
| id | doaj-art-7976c6bdf50645fab5322975deb28522 |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2018-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-7976c6bdf50645fab5322975deb285222025-08-20T02:46:20ZengWileyGeophysical Research Letters0094-82761944-80072018-08-0145168214822210.1029/2018GL078289Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath GreenlandYasmina M. Martos0Tom A. Jordan1Manuel Catalán2Thomas M. Jordan3Jonathan L. Bamber4David G. Vaughan5British Antarctic Survey, NERC Cambridge UKBritish Antarctic Survey, NERC Cambridge UKRoyal Observatory of the Spanish Navy Cádiz SpainBristol Glaciology Centre, School of Geographical Sciences University of Bristol Bristol UKBristol Glaciology Centre, School of Geographical Sciences University of Bristol Bristol UKBritish Antarctic Survey, NERC Cambridge UKAbstract Curie depths beneath Greenland are revealed by spectral analysis of data from the World Digital Magnetic Anomaly Map 2. A thermal model of the lithosphere then provides a corresponding geothermal heat flux map. This new map exhibits significantly higher frequency but lower amplitude variation than earlier heat flux maps and provides an important boundary condition for numerical ice‐sheet models and interpretation of borehole temperature profiles. In addition, it reveals new geologically significant features. Notably, we identify a prominent quasi‐linear elevated geothermal heat flux anomaly running northwest–southeast across Greenland. We interpret this feature to be the relic of the passage of the Iceland hotspot from 80 to 50 Ma. The expected partial melting of the lithosphere and magmatic underplating or intrusion into the lower crust is compatible with models of observed satellite gravity data and recent seismic observations. Our geological interpretation has potentially significant implications for the geodynamic evolution of Greenland.https://doi.org/10.1029/2018GL078289geothermal heat fluxBouguer gravity anomalyIceland hotspot trackborehole temperature profiles |
| spellingShingle | Yasmina M. Martos Tom A. Jordan Manuel Catalán Thomas M. Jordan Jonathan L. Bamber David G. Vaughan Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland Geophysical Research Letters geothermal heat flux Bouguer gravity anomaly Iceland hotspot track borehole temperature profiles |
| title | Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland |
| title_full | Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland |
| title_fullStr | Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland |
| title_full_unstemmed | Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland |
| title_short | Geothermal Heat Flux Reveals the Iceland Hotspot Track Underneath Greenland |
| title_sort | geothermal heat flux reveals the iceland hotspot track underneath greenland |
| topic | geothermal heat flux Bouguer gravity anomaly Iceland hotspot track borehole temperature profiles |
| url | https://doi.org/10.1029/2018GL078289 |
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