Deformation beneath Gakkel Ridge, Arctic Ocean: From mantle flow to mantle shear in a sparsely magmatic spreading zone

Deformation beneath Gakkel Ridge, Arctic Ocean: From mantle flow to mantle shear in a sparsely magmatic spreading zone

Mantle deformation processes leading to seafloor spreading are often difficult to infer due to the highly serpentinized and weathered state of most abyssal peridotites. We investigated the development of high-temperature crystal-plastic deformation and lower temperature mylonitization processes in r...

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Veröffentlicht in:Tectonophysics 2022-01, Vol.822, p.229186, Article 229186
Hauptverfasser: Harigane, Yumiko, Michibayashi, Katsuyoshi, Morishita, Tomoaki, Tamura, Akihiro, Hashimoto, Satoshi, Snow, Jonathan E.
Format: Artikel
Sprache:eng
Schlagworte:
Abyssal zone
Crystal preferred orientation
Deformation
Gakkel Ridge
Grain size
Heterogeneous mantle
High temperature
Low temperature
Microstructure
Mineral chemistry
Ocean floor
Olivine
Peridotite
Plagioclase
Plastic deformation
Rift valleys
Sea floor spreading
Seafloor spreading
Serpentine
Shear zone
Strain localization
Temperature
Trace elements
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Zusammenfassung:Mantle deformation processes leading to seafloor spreading are often difficult to infer due to the highly serpentinized and weathered state of most abyssal peridotites. We investigated the development of high-temperature crystal-plastic deformation and lower temperature mylonitization processes in relatively fresh (
ISSN:0040-1951
1879-3266
DOI:10.1016/j.tecto.2021.229186