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Antarctic Peninsula Path since Breakup: Review for James Ross Basin Development

Examine tectonic models for Antarctic Peninsula path and its implications on James Ross Basin development through plotted reconstructions. Includes comparisons with SAM movement and synthetic isochrons from rotated C34 picks.

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Antarctic Peninsula Path since Breakup: Review for James Ross Basin Development

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  1. Antarctic Peninsula path since breakup: review and implications for James Ross Basin developmentMarta E. GhidellaInstituto Antártico Argentino

  2. Introduction • Examine of the Antactic Peninsula path for four tectonic models: Ghidella et al (2002) Lawver et al (1999) Livermore – Nankivell – Eagles (1996, 1997, 2000) Jokat et al (2003) • Examine the relationship of the AP path with James Ross Basin development

  3. James Ross Basin

  4. Reconstructions • We are going to show reconstructions for the SAM movement, ANT kept fixed • We are not including the reconstruction of the Scotia plate • The plots include synthetic isochrons, calculated from rotated C34 picks. • The path of one point of the tip of the Antarctic Peninsula will be displayed for each epoch

  5. Ghidella et al Reconstructions begin ... Next:

  6. Ghi - 160 - SAM fixed Ghi – 160 - SAM fixed

  7. Ghi-147-SAM fixed

  8. Ghi –131 - SAM fixed

  9. Ghi – 118 - SAM fixed

  10. Ghi – 90 - SAM fixed

  11. Ghi – 83 - SAM fixed

  12. Ghi – 66 - SAM fixed

  13. Ghi – 33 - SAM fixed

  14. Ghi - 26 - SAM fixed

  15. Ghi – 0 – SAM fixed back

  16. Lawver et al Reconstructions continue ... Next:

  17. Law – 160 – SAM fixed

  18. Law – 147 – SAM fixed

  19. Law – 131 – SAM fixed

  20. Law – 118 – SAM fixed

  21. Law – 90 – SAM fixed

  22. Law – 83 – SAM fixed

  23. Law – 66 – SAM fixed

  24. Law – 33 – SAM fixed

  25. Law – 26 – SAM fixed

  26. Law – 0 – SAM fixed back

  27. Jokat et al Reconstructions continue ... Next:

  28. Jo – 159 – SAM fixed

  29. Jo – 147 – SAM fixed

  30. Jo – 131 – SAM fixed

  31. Jo – 118 – SAM fixed

  32. Jo – 90 – SAM fixed

  33. Jo – 83 – SAM fixed

  34. Jo – 66 – SAM fixed

  35. Jo – 33 – SAM fixed

  36. Jo – 26 – SAM fixed

  37. Jo – 0 – SAM fixed back

  38. Livermore – Nankivell - Eagles Reconstructions continue ... Next:

  39. Liv – 165 – SAM fixed

  40. Liv – 150 – SAM fixed

  41. Liv – 132 – SAM fixed

  42. Liv – 119 – SAM fixed

  43. Liv – 93 – SAM fixed

  44. Liv – 83 – SAM fixed

  45. Liv – 66 – SAM fixed

  46. Liv – 33 – SAM fixed

  47. Liv – 26 – SAM fixed

  48. Liv – 0 – SAM fixed back

  49. End of reconstructions

  50. All paths at present Lawver Ghidella Jokat Livermore

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