Great sumatran fault system
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Study of the strike slip fault that characterizes the Indonesian area. Specific analysis of kinematic, seismic activity and geodynamic implications.
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hematic appreciation test is a psychological assessment tool used to measure an individual's appreciation and understanding of specific themes or topics. This test helps to evaluate an individual's ability to connect different ideas and concepts within a given theme, as well as their overall comprehension and interpretation skills. The results of the test can provide valuable insights into an individual's cognitive abilities, creativity, and critical thinking skillsMicronuclei test.M.sc.zoology.fisheries.
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Exposé invité Journées Nationales du GDR GPL 2024
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Disclaimer: No one is perfect, so please mind that there might be mistakes and typos.
dtubbenhauer@gmail.com
Corrected slides: dtubbenhauer.com/talks.html
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https://ashpc.eu/
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Great sumatran fault system
- 1. Features of the Great Sumatran Fault system, Indonesia The Great Sumatran Fault system Adriano Vangone
- 2. 28/06/2017The Great Sumatran Fault System Pagina 2 Great Sumatran fault system • Strike-slip fault parallel to subduction • Extension of 1900 km • Highly segmented (19 segments) (http://www.tectonics.caltech.edu/sumatra/images/sum_fault/JGR2002Plate1lg.jpg)
- 3. 28/06/2017The Great Sumatran Fault System Pagina 3 Geodynamic setting • Oblique convergence between Australian/Indian and Sunda plates • Sunda subduction zone (McCaffrey, 2009) http://www.nature.com/nature/journal/v435/n7043/images/nature435756a-f1.2.jpg
- 4. 28/06/2017The Great Sumatran Fault System Pagina 4 Fault’s geometry Sinusoidal shape Equatorial biforcation Concavity to SW and NE
- 5. 28/06/2017The Great Sumatran Fault System Pagina 5 Fault’s fragmentation • 19 segments from NW to SE (K. Sieh et al., 2000)
- 6. Linked structures 28/06/2017The Great Sumatran Fault System Pagina 6 Batee fault Toru fold and thrust belt http://www.terrachroma-inc.com/images/geology/0812a1_fold_thrust_belt_sg_v1.jpg
- 7. Formation of Great Sumatran fault system Plio-Pleistocenic extension 28/06/2017The Great Sumatran Fault System Pagina 7
- 8. Great Sumatran Fault system – volcanic arc 28/06/2017The Great Sumatran Fault System Pagina 8 http://bagatin.altervista.org/scienze14/domandaottouno.png http://upload.wikimedia.org/wikipedia/commons/6/61/Sumatra_Volca noes.png https://mesmerizejourneys.files.wordpress.com/2011/03/ bromo-tengger-semeru.jpg
- 9. Seismicity from 1822 to today 28/06/2017The Great Sumatran Fault System Pagina 9 http://www.siaga.org/uploads/images/sumatran-fault-en.jpg
- 10. Padang Panjang earthquake, 6 March 2007 28/06/2017The Great Sumatran Fault System Pagina 10 • Pull- apart basin between Sumani e Sianok segments • Two earthquakes with Mw = 6,4 (Nakano et al., 2010)
- 11. Padang Panjang earthquake, 2007 28/06/2017The Great Sumatran Fault System Pagina 11 • Stress increasing between segments in both cosismic and intersismic periods • Mohr-Coloumb failure criterion / Pore pressure • ΔCFF = Δσs + μ(Δp − Δσn )
- 12. Slip partitioning 28/06/2017The Great Sumatran Fault System Pagina 12 http://geosphere.gsapubs.org/content/6/4/444/F3.large.jpg http://upload.wikimedia.org/wikipedia/en/thumb/9/94/Obconv2.jpeg/500px-Obconv2.jpeg McCaffrey, 2007
- 13. Conclusions 28/06/2017The Great Sumatran Fault System Pagina 13 • To the South disappears in the Strait of Sunda • Accommodates the oblique movement between the Australian-Indian and Euro- Asian plates • To the north it connects to the transform faults of the Andaman extensional basin • Earthquake magnitude between 6.5 and 7.6 • Highly segmented • Slip rate of 20 mm/yr in the central region and 10 mm/yr in the South (P. Huchon, X. Le Pichon, 1984)
- 14. References 28/06/2017The Great Sumatran Fault System Pagina 14 • Kerry Sieh, D. Natawidjaja (2000) - Neotectonic of the Sumatran fault, Indonesia - Journal of Geophysical Research vol.105, n. B12, pp 28,295-28,326 • M. Nakano et al. - Source model of an earthquake doublet that occurred in a pull-apart basin along the Sumatran fault, Indonesia - Geophys. J. Int. (2010) 181, 141–153 • Robert McCaffrey (2009) - The Tectonic Framework of the Sumatran Subduction Zone - Annu. Rev. Earth Planet. Sci. 2009. 37:345–66 • P. Huchon, X. Le Pichon (1984) - Sunda Strait and Central Sumatra fault - GEOLOGY, v. 12, p. 668- 672