Greenland geothermal heat flux distribution and estimated Curie Depths, links to gridded files ...

• Main Author: Martos, Yasmina M
• Format: Dataset
• Language: English
• Published: PANGAEA 2018
• Subjects: File content; File name; File format; File size; Uniform resource locator/link to file; Greenland; Ice Sheet; Iceland
• Online Access: https://dx.doi.org/10.1594/pangaea.892973; https://doi.pangaea.de/10.1594/PANGAEA.892973

Curie depths beneath Greenland are revealed by spectral analysis of data from the World Digital Magnetic Anomaly Map2. 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 ... : Gridded data at 15 km. X and Y geographic coordinates are in UTM23N projection. ...