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<identifier>oai:HAL:hal-01261614v1</identifier>
<datestamp>2018-01-11</datestamp>
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<setSpec>subject:sdu</setSpec>
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<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>Genetic relations between the central and southern Philippine Trench and the Sangihe Trench</title>
<creator>E. Lallemand, Serge</creator>
<creator>Popoff, Michel</creator>
<creator>Cadet, Jean-Paul</creator>
<creator>Bader, Anne-Gaëlle</creator>
<creator>Pubellier, Manuel</creator>
<creator>Rangin, Claude</creator>
<creator>Deffontaines, Benoit</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>
<description>International audience</description>
<source>ISSN: 2169-9275</source>
<source>EISSN: 2169-9291</source>
<source>Journal of Geophysical Research. Oceans</source>
<publisher>Wiley-Blackwell</publisher>
<identifier>hal-01261614</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01261614</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01261614/document</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01261614/file/lallemandJGR1998.pdf</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01261614</source>
<source>Journal of Geophysical Research. Oceans, Wiley-Blackwell, 1998, 103 (B1), pp.933-950</source>
<language>en</language>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We surveyed the junction between the central and southern Philippine Trench and the Sangihe Trench near 6øN using swath bathymetry, gravity, and magnetics. These data, along with seismicity, allow us to discuss the genetic relations between these trenches and the forces acting on converging plates. Our final model favors the northern extension of the Halmahera Arc up to 8øN, with three segments offset left-laterally along NW-SE transform faults. Accretion of the northern segment to Mindanao Island 4 to 5 m.y. ago resulted in the failure within the Philippine Sea Plate east of the arc. Initiation of the Philippine Trench between 7øN and 10øN agrees with the maximum recorded depth of the Philippine Trench floor (10,000 m below sea-level) and Philippine Sea slab (200 km). South of 6øN (trench junction), another segment of the arc is being subducted beneath the Sangihe margin, while south of 3øN, the southern segment of the Halmahera Arc is still active. The rapid southward shallowing of the trench floor along the southern Philippine Trench, the type of faulting affecting both sides of the trench, the lack of significant interplate seismicity, and the concentration of the seismicity beneath the Miangas-Talaud Ridge are interpreted as a slowing down of the subduction along this branch of the Philippine Trench compared with the rest of the subduction zone. The Sangihe deformation front has been recognized up to 7øN but seems active only south of 6øN.</description>
<date>1998</date>
</dc>
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