Révision stratigraphique de l’Ile de Timor (Indonésie orientale)

Carbonate pelagites in the post-Gondwana succession (Cretaceous – Neogene) of East Timor

“…Audley-Charles (2004) suggested that subduction of the continental margin in the region of an active Banda Trench took place from 12 Ma. The interpretation of the Kolbano Megasequence as a deposit on an Australian continental terrace analogous to Exmouth Plateau and not associated with units of the Banda Terrane gives no support to the rifted Australianderived microcontinent -Banda Arc collision theory outlined by Richardson and Blundell (1996) and Villeneuve et al (2005), although terrane collisions cannot be dismissed for components now placed in the Banda Terrane. However, the continental terrace interpretation is similar to ideas put forward, for example, by Snyder et al (1996 p. 63) that the thick crust under Timor may have been inherited from a former 'promontory on the Australian shelf margin.'…”

“…Based on the geological complexity found in these studies, a view emerged that the main tectonostratigraphic units in Timor ( Figure 2) include: (i) the Permian to Middle Jurassic Gondwana Megasequence deposited in an intracratonic setting; (ii) the Late Jurassic to Neogene Kolbano Megasequence deposited on the Australian continental margin; (iii) the Banda Terrane of Asian affinity emplaced in the collision zone during the late Neogene; (iv) the Bobonaro Mélange including block-in-clay mélange, broken formation, and mud-injection facies, that formed during the late Neogene collision; and (v) a relatively undeformed Viqueque Megasequence that records the emergence of present-day Timor (Carter et al 1976;Barber et al 1977Barber et al , 1986Harris et al 1998Harris et al , 2000Audley-Charles 2004;Harris 2006). From a different viewpoint, Villeneuve et al (2005) recognised a para-autochthonous unit of the Australian margin (equivalent to the Kolbano Megasequence); a para-allochthonous unit representing a Gondwanan block, detached during the Jurassic, that collided with Asia during the Oligocene; an allochthonous unit equivalent, in part, to the Banda Terrane; a subautochthonous unit associated with the opening of the Banda Sea and formation of the Banda Arc; and a PlioPleistocene autochthonous unit deposited in the vicinity of present-day Timor.…”

Re-evaluation of the Cablac Limestone at its type area, East Timor: Revision of the Miocene stratigraphy of Timor

“…This name, widely used in Timor (Charlton, 2002;Audley-Charles, 2004;Villeneuve et al, 2005;Harris, 2006), is now confused because the Bahaman-type limestones that form most of Cablac Mountain ( Fig. 3; Carter et al, 1976, fig.…”

Deformation of the Cablac Mountain Range, East Timor: An overthrust stack derived from an Australian continental terrace

“…1), which represents the northern part of the broader Exmouth Plateau, the pelagite succession rests on lowest Cretaceous belemnite-rich sandstone and chalk that lies unconformably above a Triassic Gondwana succession (Exon et al, 1992). This appears to mirror the stratigraphic relationships reconstructed for Timor (Charlton and Wall, 1994;Harris et al, 2000;Charlton, 2002;Villeneuve et al, 2005).…”

“…Haig et al (2008) concluded that the name ''Cablac Formation" should be abandoned. This is supported by the present study of the type area of the formation, which has not located a lithostratigraphic unit that fits the concept of the formation as used widely in the recent geological literature on Timor (e.g., Charlton, 2002;Audley-Charles, 2004;Villeneuve et al, 2005;Harris, 2006).…”