Is there a hidden plume shaping Greenland's geology? Using broadband seismic data, this study uncovers an abnormal mantle transition zone (MTZ) structure beneath Greenland. Analysis reveals depressed 410 and 660 km discontinuities in central and eastern Greenland, indicating a significant thermal anomaly suggestive of an underlying plume. Variations in MTZ thickness across Greenland suggest a tilted plume within the MTZ. The findings support geodynamic models of interactions between post-garnet phase transitions and upwelling plumes. This study corroborates geodynamic models, elucidating the interaction between post‐garnet phase transitions and upwelling plumes. The results shed light on the origin of the enigmatic Icelandic hotspot track and its influence on the thermal and lithospheric structures beneath Greenland. This research provides crucial insights into the complex geological history of the North Atlantic region, improving our understanding of mantle dynamics and the interplay between deep Earth processes and surface features.
This research aligns well with Geophysical Research Letters, a journal dedicated to timely publication of concise reports on original research spanning all aspects of the Earth, planetary, and space sciences. The findings contribute to understanding Earth's mantle dynamics and its impact on surface geological features.