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<identifier>oai:HAL:hal-00420898v1</identifier>
<datestamp>2018-01-11</datestamp>
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<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>Coeval blueschist exhumation along thousands of kilometers: Implications for subduction channel processes</title>
<creator>Monie, Patrick</creator>
<creator>Agard, Philippe</creator>
<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>Institut des Sciences de la Terre de Paris (iSTeP) ; Université Pierre et Marie Curie - Paris 6 (UPMC) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 1525-2027</source>
<source>EISSN: 1525-2027</source>
<source>Geochemistry, Geophysics, Geosystems</source>
<publisher>AGU and the Geochemical Society</publisher>
<identifier>hal-00420898</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-00420898</identifier>
<source>https://hal.archives-ouvertes.fr/hal-00420898</source>
<source>Geochemistry, Geophysics, Geosystems, AGU and the Geochemical Society, 2009, 10, pp.Q07002. 〈10.1029/2009GC002428〉</source>
<identifier>DOI : 10.1029/2009GC002428</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1029/2009GC002428</relation>
<language>en</language>
<subject lang=en>exhumation</subject>
<subject lang=en>subduction channel processes</subject>
<subject lang=en>interplate coupling</subject>
<subject lang=en>Neotethys</subject>
<subject lang=en>geochronology</subject>
<subject>[SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We herein focus on understanding what controls the detachment and migration of oceanic crustal slices along subduction zones. We provide evidence for the coeval Middle to Late Cretaceous exhumation of oceanic blueschists in the same Neotethyan subduction zone, across more than 3000 km, from depths around 30-40 km, over a short time interval (similar to 25 Ma) compared to the duration of subduction (>100 Ma). We stress the importance of such a geodynamic process and suggest that this exhumation was promoted by a regional-scale change in the long-term interplate mechanical coupling. On the basis of geological and geophysical evidence, we propose that the upward migration of oceanic fragments in subduction zones is normally inhibited and only occurs discontinuously, as the subduction channel opens up in response to a major change in plate geodynamics, slab geometry and dynamics, mantle wedge and slab hydration, or a combination of these.</description>
<date>2009</date>
</dc>
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