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<title lang=en>Paleoproterozoic tectonic evolution of the Trans-North China Orogen: toward a comprehensive model.</title>
<creator>Trap, Pierre</creator>
<creator>Faure, Michel</creator>
<creator>Lin, Wei</creator>
<creator>Le Breton, Nicole</creator>
<creator>Monié, Patrick</creator>
<contributor>Laboratoire Chrono-environnement (LCE) ; Université Bourgogne Franche-Comté (UBFC) - Université de Franche-Comté (UFC) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut des Sciences de la Terre d'Orléans (ISTO) ; Institut national des sciences de l'Univers (INSU - CNRS) - Université d'Orléans (UO) - Université François Rabelais - Tours - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>State Key Laboratory of Lithospheric Evolution ; Institute of Geology and Geophysics, Chinese Academy of Sciences</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>
<contributor>National Science Foundation of China Grant N° 40472116</contributor>
<description>International audience</description>
<source>ISSN: 0301-9268</source>
<source>Precambrian Research</source>
<publisher>Elsevier</publisher>
<identifier>insu-00628119</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00628119</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00628119/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-00628119/file/Trap-PrecambrianResearch-2011.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-00628119</source>
<source>Precambrian Research, Elsevier, 2012, 222-223, pp.191-211. 〈10.1016/j.precamres.2011.09.008〉</source>
<identifier>DOI : 10.1016/j.precamres.2011.09.008</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.precamres.2011.09.008</relation>
<language>en</language>
<subject lang=en>Trans-North China Orogen</subject>
<subject lang=en>Paleoproterozoic</subject>
<subject lang=en>Collision</subject>
<subject lang=en>Pseudosection</subject>
<subject lang=en>40Ar/39Ar dating</subject>
<subject lang=en>North China Craton</subject>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</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>In this contribution we present a reconstruction of the overall lithotectonic architecture, from inner zones to external ones, of the Paleoproterozoic Trans North China Orogen, within the North China Craton. Moreover, forward thermobarometrical modeling on a kyanite-bearing gneiss yields a reliable prograde P-T-t-D path. In addition, 40Ar/39Ar dating on rocks from distinct litho-tectonic units helps us to distinguish several tectono-metamorphic events during the orogenic development. Considering these results, we propose a geodynamic model involving three cratonic blocks, namely the Western, Fuping and Eastern Blocks, separated by two oceans, the Lüliang and Taihang Oceans. The opening of oceanic basins occurred around 2.2-2.3 Ga. After the westward subductions of oceanic lithosphere, the Trans-North-China Orogen was built up through a polyphase tectonic evolution within the period 1900-1800 Ma. The first event (D1) corresponded to the emplacement of lower and upper nappes herein called the Orthogneiss-and-Volcanites Unit (OVU) and the Low-Grade-and-Mafic Unit (LGMU), respectively. The syn-metamorphic D1 deformation (1880 ± 10 Ma) is characterized by a NW-SE stretching and mineral lineation with a top-to-the SE sense of shear. During ongoing compression of the thickening orogenic crust, a second deformation event D2 (1850 ± 10 Ma) was responsible for (1) syn-anatectic lateral flow and exhumation of the orogenic root and (2) folding of the middle and upper parts of the orogenic wedge that consequently acquired a fan-type geometry. The late D3 (1830 ± 10 Ma) and D4 (1810 ± 10 Ma) events are related to late-orogenic normal and strike-slip shearing, respectively. In our present state of knowledge, the Paleoproterozoic Trans-North China Orogen might be regarded as the assemblage of two continent-continent collisional belts, both of which are characterized by nappe stacking accommodated by top-to-the E/SE ductile shearing. Continental subduction, crustal thickening, partial melting of overthickened crust, exhumation of HP rocks and deposition of syn-orogenic detrital basins are typical features of modern collisional-type orogens.</description>
<date>2012</date>
<rights>info:eu-repo/semantics/OpenAccess</rights>
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