Indonesian Region – Earthquake Hypocenters (since 1973) Epicenter for M=9.0 event Dec 26, 2004
INDONESIAN REGION TECTONIC ELEMENTS & PORPHYRY DEPOSITS 30 o 40 o 55 o 65 o >70 o EQ <300km EQ >600km Toba Krakatoa Martabe Slab topologies confirmed by tomographic imaging
Roo Rise 55 o 65 o 500 km (Modified from McCaffrey, 1988) 2 - 3 mm/yr E-W extension on strike-slip faults. Hypocenter depths < 30 km N15 o E subduction at 7 cm/yr. BANDA ARC, INDONESIA EARTHQUAKE FAULT PLANE SOLUTIONS Batu Hijau Elang
Simplified Geology of Sumbawa Differential Exhumation Elang Hu’ u Soripesa Most uplifted Western block Central block Eastern block Least uplifted
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