Evolution of the Source Mineralogy and Lithospheric Controls on Magmatism During the Northeast Atlantic Continental Breakup
Abstrak
Abstract The mid‐Norwegian Margin, part of the North Atlantic Igneous Province (NAIP), is a well‐studied volcanic rifted margin formed during the breakup between Greenland and Eurasia ∼56 Ma, with the largest accumulation of magmatic material hosted by the Vøring Margin section. Despite extensive study in the area, the main controls on magmatic productivity during continental breakup remain debated. To constrain the drivers of breakup magmatism, we developed an inverse Monte Carlo statistical melting model that infers source mineralogy from basalt chemistry. When applied to basalts recently recovered on the Vøring Margin, our results reveal a clear shift in source mineralogy during rifting, with peak magmatism coinciding with clinopyroxene enrichment, despite mantle potential temperatures likely being capped below 1500°C. We also establish that, while the proto‐Iceland mantle plume played a role during the emplacement of the NAIP, the main driver for the continental breakup magmatism is lithospheric thinning as a consequence of continent breakup. This study provides new insights into the magmatic and geodynamic evolution of the mid‐Norwegian Margin, emphasizing the role of lithospheric refertilization in driving breakup magmatism.
Topik & Kata Kunci
Penulis (25)
Emily H. Cunningham
Sarah Lambart
Pengyuan Guo
Sayantani Chatterjee
Christian Tegner
Autumn Hartley
Ashley M. Morris
Sverre Planke
Christian Berndt
Carlos A. Alvarez Zarikian
Peter Betlem
Henk Brinkhuis
Marialena Christopoulou
Eric C. Ferré
Irina Y. Filina
Joost Frieling
Dustin T. Harper
Morgan T. Jones
Jack Longman
John M. Millett
Geoffroy T. F. Mohn
Reed P. Scherer
Natalia Varela
Weimu Xu
Stacy L. Yager
Akses Cepat
- Tahun Terbit
- 2026
- Sumber Database
- DOAJ
- DOI
- 10.1029/2025GC012556
- Akses
- Open Access ✓