Tehostekuva

1g. Paleomagnetism of the Karoo basalts - Antarctica

Participating scientists

  • E. Piispa (post doc, Michigan Tech, USA)
  • L.J. Pesonen, prof. (emeritus)
  • A. Luttinen (Finnish Museum of Natural History, University of Helsinki)

Project goals

The goal is to define the pre-breakup position of Grunehogna craton (Antarctica) relative to the Kalahari (Africa) craton and test the Pangaea reconstructions. Other aims are to form detailed magnetostratigraphies with the help of AMS -measurements and geochemistry to outline the history of the Karoo lavas and dykes from Dronning Maud Land, Antarctica. Methods include detailed rock magnetic, petrophysical and geochemical measurements coupled with paleomagnetic analysis of the natural remanent magnetization.

Highlights

Pictures A and B
(A) Reconstruction of E. Africa and Antarctica at ~180 Ma ago, based on compilation of the new paleomagnetic results (this work) and previous results. (B) Regional magnetic stratigraphy correlations between two nunataks, Plogen and Basen, showing also the different lavatypes.

Recent publications

  • Piispa, E.J., Pesonen, L.J., Luttinen, A.V. 2005. Antarctica - Kalahari reconstruction at 180 Ma - new paleomagnetic data. 5th International dyke conference, IDC5, 31.7. - 3.8.2005, Rovaniemi, Finland, p.38.