Struktur Internal Bumi , Pergerakan lempeng Tektonik dan Vulkanik

1. Struktur Internal Bumi, PergerakanlempengTektonikdanVulkanik Selasa 8 September 2009 GeografiLingkungan Kelompok 3

2. Kelompok 3 RikiOktapiana 15106049 Boy Dwitama 15106038 Mochtar 15107015 Yanes David 15107029 OkxyIsdityo 15107047 SyarifHidayat 15107079 NiksonNadeak 15107083

3. Content Struktur Internal Bumi TeoriPergerakanLempengTektonik SejarahPergerakanLempeng Vulkanik Peran-peranilmukebumian Studikasus :GempaTasik 2 September 2009

4. Struktur Internal Bumi • Strukturbumiadalahsebagaiberikut • Intibumi • Inner Core • Outer Core • Mantel Bumi • Asthenosphere (hot but stronger than due to high preassure) • Lithosphere (cool, rigid, brittle) • Mesosphere(hot,weak ,plastik) • KerakBumi

7. Bagaimana Model Internal Bumidibuat?

8. GelombangSeismik Gelombangseismikadalahrambatanenergi yang disebabkankarenaadanyagangguandidalamkerakbumi, misalnyaadanyapatahanatauadanyaledakan. Energiiniakanmerambatkeseluruhbagianbumidandapatterekamolehseismometer.

9. 1950an -1960an

11. Perbandingan Model Bumi Bullen, 1942 danDziewonski, 1981

14. Conditions in the mantle • Heat is flowing into the mantle from the core • Hotter mantle material is less dense (because of temperature) and circulates upward • Cooler mantle material is more dense (b/c of temp) and circulates downward. • This circulation is called CONVECTION

15. Convection Currents Cool Cool HOT Heat Source

16. 02_03

18. TeoriPergerakanLempeng • Teoriinipertama kali dikemukakanoleh Alfred Lothar Wegener (1880-1930) • Berdasarkan • Kesamaan fossil di America Selatan dan Africa • Apparently contiguous mountain ranges • KesamaanbentukgarispantaiantaraAmerika Selatan dengan Africa

21. Kesamaan Fossil tersebut

24. Masukin video darijurrasic ->gondwana->pangea->kesekarang`

25. BatasanLempeng • TipeBatasanLempeng • Divergent Boundary – moving apart • Convergent Boundary – moving together • Transform Fault Boundary – moving sideaways past each other

26. CONVERGENT BOUNDARY In a convergent boundary , the plates are coming together.

27. Oceanic-Oceanic Convergent Boundaries

28. Oceanic-Continental Convergent Boundaries

29. Continental-Continental Convergent Boundaries

30. Continental-Continental Convergent Boundaries

31. DIVERGENT BOUNDARY • In a divergent boundary , the plates are moving apart.

33. TRANSFORM BOUNDARY • A transform boundary occurs when two plates slide past each other.

34. PatahanLempeng

35. 02_04a

37. How does the internal structure of the Earth and plate tectonics effect how we live? • Hazards – Earthquakes, Tsunamis, Volcanoes, Landslides • Climate – atmospheric/ocean circulation • Natural Resources • Landscape • River Systems- Drainage Patterns

38. 02_08a

39. 02_08c

40. HotSpot of Vulkanik

42. Earthquake Terjadikarenapelepasanenergiantara 2 benda( lempengbumi) StudikasusGempaTasik : 2 September 2009 D:\Office\semester 7 2009\geolink\onePAGER.pdf

43. PerananIlmuilmuKebumianTerhadapPergerakanlempengtersebut Geodesy Geology->kesamaanfosil Volcanology-> tentanggunung-gunungberapi Seismology

44. Geodetic observation. To all the traditional lines of evidence, we must now add direct measurement of plate velocities by geodesy (VLBI and GPS).

45. THE END SekiandanTerimaKasih Semogabermanfaat