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

Villeneuve, Michel
Cornée, Jean-Jacques
Harsolumakso, Agus
Published in Eclogae Geologicae Helvetiae. 2005, vol. 98, no. 2, p. 297-310
Abstract Since the past few decades, numerous stratigraphic scales have been proposed for Timor Island because of its strong tectonic complexity as well as its facies variability. From the first studies, several stratigraphic series have been distinguished that correspond to three major litho-structural units: allochthonous, sub-autochthonous and autochthonous units respectively. Our recent stratigraphic and geodynamic data show that Timor Island comprises six units, each linked with one key episode of the geological history of the island. This evolution starts at the Jurassic time with the break-up of a block from the Gondwanan continent (para-allochthonous unit) and its successive collision with the Asiatic volcanic arc during the Oligo-Miocene (allochthonous and sub-autochthonous units). Then, by the Late Miocene, this assemblage of blocks separates from the Asia continent during the South Banda Sea opening (sub-autochthonous unit) and finally collides with the North Australian margin during the Middle Pliocene (Australian platform and Kolbano Group). Since then, Timor Island is a part of the Australian northern margin (autochthonous unit). This works presents the various stratigraphic scales of each unit as well as some propositions for their correlation. The nearby Sumba and Sulawesi Islands are also compared in order to develop a new model for the geodynamic evolution of Timor.
Keywords TimorIndonesiaPaleozoicMesozoicCainozoicNeogenestratigraphic scale
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Research group Sedimentology, Biostratigraphy and Micropaleontology
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VILLENEUVE, Michel et al. Révision stratigraphique de l'Ile de Timor (Indonésie orientale). In: Eclogae Geologicae Helvetiae, 2005, vol. 98, n° 2, p. 297-310. doi: 10.1007/s00015-005-1155-8 https://archive-ouverte.unige.ch/unige:4139

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Deposited on : 2009-11-27

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