Paleomagnetism and tectonics of the South Shetland Islands and the northern Antarctic Peninsula - Archive ouverte HAL Access content directly
Journal Articles Earth and Planetary Science Letters Year : 2011

Paleomagnetism and tectonics of the South Shetland Islands and the northern Antarctic Peninsula

, , (1) , ,
1
F. Poblete
  • Function : Author
César Arriagada
  • Function : Author
Pierrick Roperch
N. Astudillo
  • Function : Author
Et Al.
  • Function : Author

Abstract

New paleomagnetic data presented here from 61 sites in Paleozoic, Mesozoic and Cenozoic igneous and sedimentary rocks from the Antarctic Peninsula and the South Shetland Islands constrain the relative motion of the Antarctic Peninsula since the mid-Cretaceous and allow the quantification of tectonic rotation between the different blocks recognized within the area. Paleozoic and Jurassic results failed the fold test and suggest an important remagnetization in the area. The similarity between these results and those obtained from Cretaceous intrusives indicates a mid-Cretaceous age for the remagnetization. The paleopoles obtained for the different blocks and for different ages suggest that there is no relative rotation among them. These combined results allow us to obtain a Cretaceous (90 Ma) and Paleocene (60 Ma) paleopole. These paleopoles document a very low apparent polar wandering of the Antarctic Peninsula for the last 100 Ma.
Not file

Dates and versions

insu-00669922 , version 1 (14-02-2012)

Identifiers

Cite

F. Poblete, César Arriagada, Pierrick Roperch, N. Astudillo, Et Al.. Paleomagnetism and tectonics of the South Shetland Islands and the northern Antarctic Peninsula. Earth and Planetary Science Letters, 2011, 302 (-3-4), pp.299-313. ⟨10.1016/j.epsl.2010.12.019⟩. ⟨insu-00669922⟩
72 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More