The Banda Arc (main arc, Inner, and Outer) is a dual chain of islands in eastern Indonesia that is around 2,300 km long. It is the result of the collision of a continent and an intra-oceanic island arc.
The presently active volcanic arc is mounted on stretched continental and oceanic crust whereas the associated subduction trench is underlain by continental crust, which has subducted deep enough to contaminate the volcanic arc with continental melts.[1] The island of Timor is notable for the lack of volcanic activity. This is due to the island representing the zone of fore-arc and continental collision which prevents volcanic activity from occurring.[2]
The convergence of the Indo-Australian plates and Eurasia resulted in the formation of the Sunda and Banda island arcs. The transitional zone between the arcs is located south of Flores Island and is characterized by the change in the tectonic regime along the boundary in the Timor Region.[3][4]
- ^ D. J. Whitford; P. A. Jezek (1979). "Origin of late-cenozoic lavas from the Banda arc, Indonesia: Trace element and Sr isotope evidence". Contributions to Mineralogy and Petrology. 68 (2): 141–150. Bibcode:1979CoMP...68..141W. doi:10.1007/BF00371896. S2CID 128805460.
- ^ Audley-Charles, M.G. "Tectonic post-collision processes in Timor".
- ^ Harris, R. A. "The Nature of the Banda Arc-Continent Collision". Arc-Continent Collision. doi:10.1007/978-3-540-88558-0_7.
- ^ A. Shulgin; H. Kopp; C. Mueller; E. Lueschen; L. Planert; M. Engels; E. R. Flueh; A. Krabbenhoeft & Y. Djajadihardja (May 27, 2009). "Sunda-Banda arc transition, Incipient continent-island arc collision (northwest Australia)". Geophysical Research Letters. 36 (10): L10304. Bibcode:2009GeoRL..3610304S. doi:10.1029/2009gl037533.