Japan Geoscience Union Meeting 2015

Presentation information

Oral

Symbol S (Solid Earth Sciences) » S-CG Complex & General

[S-CG64] Ocean Floor Geoscience

Thu. May 28, 2015 9:00 AM - 10:45 AM A05 (APA HOTEL&RESORT TOKYO BAY MAKUHARI)

Convener:*Kyoko Okino(Ocean Research Institute, University of Tokyo), Keiichi Tadokoro(Research Center for Seismology, Volcanology and Earthquake and Volcano Research Center, Nagoya University), Osamu Ishizuka(Geological Survey of Japan, AIST), Tomohiro Toki(Faculty of Science, University of the Ryukyus), Narumi Takahashi(Research and Development Center for Earthquake and Tsunami, Japan Agency for Marine-Earth Science and Technology), Chair:Hiroshi Sato(School of Business Administration, Senshu University), Takehi Isse(Earthquake Research Institute)

9:00 AM - 9:15 AM

[SCG64-16] Paleoshape of Antarctica and Australia

Yusuke TAGAMI1, *Yasushi HARADA1 (1.School of Marine Science and Technology, Tokai University)

Keywords:GPS, Antarctica, Australia, deformation

Using 20 years GPS data, we reconstructed the paleo shapes of Antarctica and Australia continents by extrapolating smooth-surfaced vector field of the GPS data to check how far we can extrapolate the GPS data toward the past.

Figure below shows that about 90Ma shapes of the two continents (left) fit better each oher than current shapes of the continents (right). black lines are coast lines, green and red lines are 3000m depth contours of Antarctica and Australia respectively. This result implies that 20 years of GPS data include deformation of continents for the time scale of tens of million years.