Abstract
To advance our comprehension of the complex geological history and mantle dynamics in the north atlantic region, we employ all available broadband seismic data recorded in greenland to reveal an abnormal mantle transition zone (mtz) structure. Central and eastern greenland exhibits depressed 410 and 660 km discontinuities (d410 and d660, respectively) bordering the mtz, indicative of a substantial thermal anomaly associated with an underlying plume, surpassing the 1,800°c threshold for post-garnet phase transitions at the d660. Variations in mtz thickness across greenland stem from differing temperature anomalies at the d410 and d660, possibly linked to a tilted plume within the mtz. These findings corroborate 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.
Recommended Citation
D. Wang et al., "A Tilted Broad Plume Underneath the Greenland Cratonic Keels," Geophysical Research Letters, vol. 51, no. 8, article no. e2023GL107360, Wiley Open Access; American Geophysical Union, Apr 2024.
The definitive version is available at https://doi.org/10.1029/2023GL107360
Department(s)
Geosciences and Geological and Petroleum Engineering
Publication Status
Open Access
Keywords and Phrases
Greenland; mantle dynamics; mantle plume; receiver function; volcanism
International Standard Serial Number (ISSN)
1944-8007; 0094-8276
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2024 The Authors, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
28 Apr 2024
Comments
Division of Earth Sciences, Grant 1830644