The Subantarctic lithospheric mantle - Archive ouverte HAL Access content directly
Book Sections Year : 2021

The Subantarctic lithospheric mantle

Guillaume Delpech
  • Function : Author
  • PersonId : 857634
  • IdHAL : gdelpech
James M Scott
  • Function : Author
Michel Grégoire
Bertrand N. Moine
Dongxu Li
  • Function : Author
Jingao Liu
  • Function : Author
D. Graham Graham Pearson
  • Function : Author
Quinten H A van Der Meer
  • Function : Author
Tod E Waight
  • Function : Author
Suzanne y O'Reilly
  • Function : Author


We present a summary of peridotite in the Subantarctic (46 to 60°S) surrounding the Antarctic Plate. Peridotite xenoliths occur on Kerguelen and Auckland islands. Kerguelen islands are underlain by a plume whereas the Auckland Islands are part of continental Zealandia, which is a Gondwana-rifted fragment. Small amounts of serpentinised peridotite has been dredged from fracture zones on the Southeast Indian, Southwest Indian, and Pacific Antarctic Ridge, and represents upwelled asthenosphere accreted to form lithosphere. Supra-subduction zone peridotite has been collected from two locations on the Sandwich Plate. Peridotites from most Subantarctic occurrences are moderately to highly depleted, and many show signs of subsequent metasomatic enrichment. Os isotopes indicate that the Subantarctic continental and oceanic lithospheric mantle contains ancient fragments that underwent depletion long before formation of the overlying crust.
Fichier principal
Vignette du fichier
Geol_SocL_2021.pdf (2.22 Mo) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

hal-03266963 , version 1 (22-06-2021)



Guillaume Delpech, James M Scott, Michel Grégoire, Bertrand N. Moine, Dongxu Li, et al.. The Subantarctic lithospheric mantle. The Geochemistry and Geophysics of the Antarctic Mantle, pp.M56-2020-13, 2021, ⟨10.1144/M56-2020-13⟩. ⟨hal-03266963⟩
63 View
131 Download



Gmail Facebook X LinkedIn More