Mantle plume and rift-related volcanism during the evolution of the Rio Grande Rise

Hoyer P, Haase K, Regelous M, O'Connor J, Homrighausen S, Geissler W, Jokat W (2022)

Publication Type: Journal article

Publication year: 2022

Journal

Communications Earth & Environment Springer Nature Limited

Book Volume: 3

Article Number: 18

Issue: 1

DOI: 10.1038/s43247-022-00349-1

Abstract

The Rio Grande Rise in the western South Atlantic Ocean has been interpreted as either an oceanic plateau related to the Tristan-Gough mantle plume, or a fragment of detached continental crust. Here we present new major and trace element data for volcanic rocks from the western and eastern Rio Grande Rise and the adjacent Jean Charcot Seamount Chain. The eastern Rio Grande Rise and older parts of the western Rio Grande Rise are comprised of tholeiitic basalt with moderately enriched trace element compositions and likely formed above the Tristan-Gough mantle plume close to the southern Mid-Atlantic Ridge. Younger alkalic lavas from the western Rio Grande Rise and the Jean Charcot Seamount Chain were formed by lower degrees of melting beneath thicker lithosphere in an intraplate setting possibly during rifting of the plateau. There is no clear geochemical evidence that remnants of continental crust are present beneath the Rio Grande Rise.

Authors with CRIS profile

Patrick Hoyer Lehrstuhl für Endogene Geodynamik Karsten Haase Lehrstuhl für Endogene Geodynamik Marcel Regelous Geozentrum Nordbayern

Related research project(s)

Rio Grande Rise: Ein neuer Typ einer extremen Hotspot-Spur, eine propagierende Scherzone, oder beides? March 1, 2022 - Feb. 29, 2024

Involved external institutions

Alfred-Wegener-Institut Helmholtz-Zentrum für Polar- und Meeresforschung (AWI) DE Germany (DE) GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel DE Germany (DE)

How to cite

APA:

Hoyer, P., Haase, K., Regelous, M., O'Connor, J., Homrighausen, S., Geissler, W., & Jokat, W. (2022). Mantle plume and rift-related volcanism during the evolution of the Rio Grande Rise. Communications Earth & Environment, 3. https://dx.doi.org/10.1038/s43247-022-00349-1

MLA:

Hoyer, Patrick, et al. "Mantle plume and rift-related volcanism during the evolution of the Rio Grande Rise." Communications Earth & Environment 3 (2022).

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