Hotspot magmatism and volcanic hazard at Cape Verde through the lens of shipborne surveying and dredging

Abstract

The Cape Verde archipelago is a long‐lived volcanic ocean island chain formed by a mantle plume in the Atlantic Ocean. The archipelago is characterized by ten subaerial islands with complex age relationships, abundant submarine volcanism and variable volcanic hazards. Numerous studies of the subaerial volcanism have shown extensive diversity in rock types, although comparatively few have focused on submarine volcanism and its relationship to plume evolution. Here, we share preliminary results and new observations from R/V Roger Revelle cruise RR2510, which conducted high‐resolution multibeam bathymetry, sub‐bottom profile surveys and targeted dredging of submarine seamounts. Dredging enabled sampling of young volcanic cones formed atop debris fans and bathymetry confirmed the absence of substantial volcanic edifices within the ring of islands. This suggests that melt generation is confined to the islands and not within the Cape Verde swell. Preliminary results from RR2510 demonstrate the critical role of shipboard research in understanding ocean island systems, integrating monogenic volcanism with broader volcanic hazards and advancing early career‐led marine geosciences and international collaborations.

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Cite

BibTeX RIS

BibTeX

@article{oller2026hotspot,
  title = {{Hotspot magmatism and volcanic hazard at Cape Verde through the lens of shipborne surveying and dredging}},
  author = {Brian Oller and Hunter R Edwards and Yash Srivastava and Abigail K Barker and Alex Kovalick and Giovanni Lima and Cornelia Nilsson and Marine Paquet and Easton Satin‐shaw and Isaias Teixeira and M. Jeff Buxton and Noah Desrosiers and Mason Schettig and James M D Day},
  journal = {Geology Today},
  year = {2026},
  month = jul,
  doi = {10.1111/gto.70028},
  url = {https://hal.science/hal-05794233v1},
  note = {CC BY 4.0},
}

RIS

TY  - JOUR
TI  - Hotspot magmatism and volcanic hazard at Cape Verde through the lens of shipborne surveying and dredging
AU  - Brian Oller
AU  - Hunter R Edwards
AU  - Yash Srivastava
AU  - Abigail K Barker
AU  - Alex Kovalick
AU  - Giovanni Lima
AU  - Cornelia Nilsson
AU  - Marine Paquet
AU  - Easton Satin‐shaw
AU  - Isaias Teixeira
AU  - M. Jeff Buxton
AU  - Noah Desrosiers
AU  - Mason Schettig
AU  - James M D Day
PY  - 2026
DA  - 2026/07/30
JO  - Geology Today
DO  - 10.1111/gto.70028
UR  - https://hal.science/hal-05794233v1
AB  - The Cape Verde archipelago is a long‐lived volcanic ocean island chain formed by a mantle plume in the Atlantic Ocean. The archipelago is characterized by ten subaerial islands with complex age relationships, abundant submarine volcanism and variable volcanic hazards. Numerous studies of the subaerial volcanism have shown extensive diversity in rock types, although comparatively few have focused on submarine volcanism and its relationship to plume evolution. Here, we share preliminary results and new observations from R/V Roger Revelle cruise RR2510, which conducted high‐resolution multibeam bathymetry, sub‐bottom profile surveys and targeted dredging of submarine seamounts. Dredging enabled sampling of young volcanic cones formed atop debris fans and bathymetry confirmed the absence of substantial volcanic edifices within the ring of islands. This suggests that melt generation is confined to the islands and not within the Cape Verde swell. Preliminary results from RR2510 demonstrate the critical role of shipboard research in understanding ocean island systems, integrating monogenic volcanism with broader volcanic hazards and advancing early career‐led marine geosciences and international collaborations.
SN  - 0266-6979
SN  - 1365-2451
ER  -

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