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<title lang=en>West Timor: a key for the eastern Indonesian geodynamic evolution</title>
<creator>Villeneuve, Michel</creator>
<creator>Bellon, Hervé</creator>
<creator>Martini, Rossana</creator>
<creator>Harsolumakso, Agus</creator>
<creator>Cornee, Jean-Jacques</creator>
<contributor>Centre de sédimentologie-paléontologie ; Université de Provence - Aix-Marseille 1 - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Domaines Océaniques (LDO) ; Centre National de la Recherche Scientifique (CNRS) - Institut d'écologie et environnement - Observatoire des Sciences de l'Univers - Université de Brest (UBO) - Institut national des sciences de l'Univers (INSU - CNRS)</contributor>
<contributor>Department of Geology and Palaeontology - UNIGE ; Université de Genève (UNIGE)</contributor>
<contributor>Institute Technology Bandung ; Institut Teknologi Bandung (ITB)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>Bulletin Société Géologique de France</source>
<identifier>insu-00933548</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00933548</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-00933548</source>
<source>Bulletin Société Géologique de France, 2013, 184 (6), pp.569-582. 〈10.2113/gssgfbull.184.6.569〉</source>
<identifier>DOI : 10.2113/gssgfbull.184.6.569</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.2113/gssgfbull.184.6.569</relation>
<language>en</language>
<subject lang=en>Indonesia</subject>
<subject lang=en>Timor</subject>
<subject lang=en>Sulawesi</subject>
<subject lang=en>Sumba</subject>
<subject lang=en>Tectonic nappes</subject>
<subject lang=en>Overthrusts</subject>
<subject lang=en>Eocene</subject>
<subject lang=en>Oligocene and Pliocene collisions</subject>
<subject lang=en>Neogene events</subject>
<subject lang=en>Palaeogeographic reconstructions</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<subject>[SDE.MCG] Environmental Sciences/Global Changes</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Timor Island was at time considered as an example of "accretionary prism" linked to the collision between the Australian block and the Banda arc. However, its geological evolution is more complex. Five main superimposed structural units are distinguished in West Timor. The today structure is the result of three main tectonic events that occurred during the Late Oligocene, Late Early Pliocene and Late Pliocene-Early Pleistocene times, respectively. Our field investigations in the 1990 to 2000 decade completed with geochemical analyses and K-Ar datings (Jurassic and Miocene ages) of magmatism allow to precise the geodynamic evolution of Timor that can be summarized as follows: a first block was detached from Gondwana (unit 2) and drifted to the Asiatic margin until the Late Oligocene when it collided with the Asiatic active margin (unit 3). Then, the new block formed by both 2 and 3 units drifted to the south during the Miocene and the Early Pliocene until it collided with the Australian margin (ASM), by the Late Early Pliocene. Then, the Australian and Timor blocks moved together towards the North-North East during the Late Pliocene until they collided with the Banda fore-arc (unit 4). Later on (Pleistocene), Timor island was capped by the "autochthon" (unit 5) and then on (Quaternary?) by the Banda volcanic arc northward thrusted over the South Banda basin. Taking in consideration its close relationships with both the Australian plate and the Eurasian one. Timor may be considered as a key area for building this geodynamical scenario of Indonesia.</description>
<date>2013-12-02</date>
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