Abstract
The initiation and evolution of marginal seas, especially those developing under a convergent setting, is one of the more enigmatic aspects of plate tectonics. Here, we report the presence of slab relics in the mid-mantle of the Woodlark rift in the southwestern Pacific based on a new map of the topography of the mantle discontinuities from a receiver function analysis and evidence from body-wave tomography. the widespread mantle transition-zone thickening rules out active mantle upwelling, and the revealed slab relics in both the upper and middle mantle may hydrate the upper mantle, which can be expected to further weaken the overlying lithosphere. Such a process can then promote initial continental rifting when this lithosphere is exposed to tensional stress like slab-pull stretching originating from the nearby active subduction.
Recommended Citation
Y. Yu et al., "Insights into Initial Continental Rifting of Marginal Seas from Seismic Evidence for Slab Relics in the Mid-Mantle of the Woodlark Rift, Southwestern Pacific," Geology, vol. 51, no. 12, pp. 1117 - 1121, Geological Society of America, Jan 2023.
The definitive version is available at https://doi.org/10.1130/G51528.1
Department(s)
Geosciences and Geological and Petroleum Engineering
International Standard Serial Number (ISSN)
1943-2682; 0091-7613
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2025 Geological Society of America, All rights reserved.
Publication Date
01 Jan 2023
Comments
Alexander von Humboldt-Stiftung, Grant 42074052