Transform-normal extension in the Victoria Land Basin (Antarctica)

Translated title of the contribution: Transform-normal extension in the Victoria Land Basin (Antarctica)

Giacomo Spadini*, Zvi Ben-Avraham, Martina Busetti

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The Victoria Land Basin is the westernmost branch of the Ross Sea rift system. It runs parallel to the Transantarctic Mountains which experienced 5 km of uplift during the Cenozoic. Several subbasins, with more than 6 km of Cenozoic sedimentary fill, were formed along the Victoria Land Basin during the same period. The analysis of multichannel seismic profiles suggests that a large transcurrent system runs along the Lee Arch, at the center of the Victoria Land Basin, which separates the Discovery Graben from the eastern basins. As a result, large asymmetric basins have developed here. They are bounded on one side by the transcurrent fault system and on the other side by normal faults. This structural situation is similar to other large sedimentary basins along continental transforms where transrorm-normal extension takes place. Previous studies pointed out the strike-slip nature of the Victoria Land Basin. In the present study we propose the Transform-Normal Extension model as the best mechanism to explain the observed structural features and the reconstructed evolution.

Translated title of the contributionTransform-normal extension in the Victoria Land Basin (Antarctica)
Original languageEnglish
Pages (from-to)257-269
Number of pages13
JournalRendiconti Lincei
Issue number4
StatePublished - 1998


  • Antarctica
  • Strike-slip tectonics
  • Transform-normal extension


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