A decade of GPS in Southeast Asia: Resolving Sundaland motion and boundaries
Identifieur interne : 002213 ( Istex/Curation ); précédent : 002212; suivant : 002214A decade of GPS in Southeast Asia: Resolving Sundaland motion and boundaries
Auteurs : W. J. F. Simons [Pays-Bas] ; A. Socquet [Pays-Bas, France] ; C. Vigny [France] ; B. A. C. Ambrosius [Pays-Bas] ; S. Haji Abu [Malaisie] ; Chaiwat Promthong [Thaïlande] ; C. Subarya [Indonésie] ; D. A. Sarsito [Indonésie] ; S. Matheussen [Pays-Bas] ; P. Morgan [Australie] ; W. Spakman [Pays-Bas]Source :
- Journal of Geophysical Research: Solid Earth [ 0148-0227 ] ; 2007-06.
Descripteurs français
English descriptors
- KwdEn :
- Active deformation, Active tectonics, Altamimi, Asia network, Asia region, Asian earth, Azimuth, Bako, Bellier, Black dots, Bock, Borneo, Borneo trench, Calais, Campaign sites, Central java, China block, Collision zone, Confidence level, Continental collision, Convergence, Crustal, Crustal deformation, Crustal motion, Curray, Daily solutions, Data analysis, Deformation, Deformation zone, Deforming, Earth planet, Eastern himalayan syntaxis, Eastern indonesia, Elastic deformation, Electronic supplement, Eurasia, Eurasian, Eurasian plate, Fernandes, Formal errors, Genrich, Geodetic, Geodyssea, Geodyssea project, Geol, Geophys, Great sumatran fault, High strain rates, Internal deformation, Interplate deformation, Iwakuni, Java, Java trench, Lett, Makassar, Makassar strait, Malaysia, Mangkalihat peninsula, Mccaffrey, Michel, Molnar, Myanmar, Northern sumatra, Oblique, Oblique plate convergence, Permanent stations, Plate boundaries, Plate boundary deformation, Plate convergence, Plate motions, Prawirodirdjo, Rangin, Reference frame, Relative motion, Relative vector, Residual, Residual vectors, Residual velocities, River fault, Rotation pole, Rotation vector, Sabah, Sagaing fault, Seismic, Seismic activity, Seismicity, Shear zone, Shen, Simon, Socquet, Southeastern part, Strain axis, Strain rates, Subarya, Subduction, Subduction zone, Sulawesi, Sumatra, Sumatran, Sunda, Sunda shelf, Sunda trench, Sundaland, Sundaland block, Sundaland block boundaries, Sundaland boundaries, Sundaland motion, System measurements, Tapponnier, Tectonic, Tectonics, Tensor, Thailand, Tibetan plateau, Time series, Trench, Undeformed, Undeformed sundaland block, Velocity estimates, Velocity field, Velocity vectors, Vigny, Wang.
- Teeft :
- Active deformation, Active tectonics, Altamimi, Asia network, Asia region, Asian earth, Azimuth, Bako, Bellier, Black dots, Bock, Borneo, Borneo trench, Calais, Campaign sites, Central java, China block, Collision zone, Confidence level, Continental collision, Convergence, Crustal, Crustal deformation, Crustal motion, Curray, Daily solutions, Data analysis, Deformation, Deformation zone, Deforming, Earth planet, Eastern himalayan syntaxis, Eastern indonesia, Elastic deformation, Electronic supplement, Eurasia, Eurasian, Eurasian plate, Fernandes, Formal errors, Genrich, Geodetic, Geodyssea, Geodyssea project, Geol, Geophys, Great sumatran fault, High strain rates, Internal deformation, Interplate deformation, Iwakuni, Java, Java trench, Lett, Makassar, Makassar strait, Malaysia, Mangkalihat peninsula, Mccaffrey, Michel, Molnar, Myanmar, Northern sumatra, Oblique, Oblique plate convergence, Permanent stations, Plate boundaries, Plate boundary deformation, Plate convergence, Plate motions, Prawirodirdjo, Rangin, Reference frame, Relative motion, Relative vector, Residual, Residual vectors, Residual velocities, River fault, Rotation pole, Rotation vector, Sabah, Sagaing fault, Seismic, Seismic activity, Seismicity, Shear zone, Shen, Simon, Socquet, Southeastern part, Strain axis, Strain rates, Subarya, Subduction, Subduction zone, Sulawesi, Sumatra, Sumatran, Sunda, Sunda shelf, Sunda trench, Sundaland, Sundaland block, Sundaland block boundaries, Sundaland boundaries, Sundaland motion, System measurements, Tapponnier, Tectonic, Tectonics, Tensor, Thailand, Tibetan plateau, Time series, Trench, Undeformed, Undeformed sundaland block, Velocity estimates, Velocity field, Velocity vectors, Vigny, Wang.
Abstract
A unique GPS velocity field that spans the entire Southeast Asia region is presented. It is based on 10 years (1994–2004) of GPS data at more than 100 sites in Indonesia, Malaysia, Thailand, Myanmar, the Philippines, and Vietnam. The majority of the horizontal velocity vectors have a demonstrated global accuracy of ∼1 mm/yr (at 95% confidence level). The results have been used to (better) characterize the Sundaland block boundaries and to derive a new geokinematic model for the region. The rotation pole of the undeformed core of the Sundaland block is located at 49.0°N–94.2°E, with a clockwise rotation rate of 0.34°/Myr. With respect to both geodetically and geophysically defined Eurasia plate models, Sundaland moves eastward at a velocity of 6 ± 1 to 10 ± 1 mm/yr from south to north, respectively. Contrary to previous studies, Sundaland is shown to move independently with respect to South China, the eastern part of Java, the island of Sulawesi, and the northern tip of Borneo. The Red River fault in South China and Vietnam is still active and accommodates a strike‐slip motion of ∼2 mm/yr. Although Sundaland internal deformation is general very small (less than 7 nanostrain/yr), important accumulation of elastic deformation occurs along its boundaries with fast‐moving neighboring plates. In particular in northern Sumatra and Malaysia, inland‐pointing trench‐perpendicular residual velocities were detected prior to the megathrust earthquake of 26 December 2004. Earlier studies in Sumatra already showed this but underestimated the extent of the deformation zone, which reaches more than 600 km away from the trench. This study shows that only a regional Southeast Asia network spanning thousands of kilometers can provide a reference frame solid enough to analyze intraplate and interplate deformation in detail.
Url:
DOI: 10.1029/2005JB003868
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J. F." last="Simons">W. J. F. Simons</name><affiliation wicri:level="1"><mods:affiliation>E-mail: wim.simons@lr.tudelft.nl</mods:affiliation><country wicri:rule="url">Pays-Bas</country></affiliation><affiliation wicri:level="1"><mods:affiliation>Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft, Netherlands</mods:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>E-mail: wim.simons@lr.tudelft.nl</mods:affiliation><country wicri:rule="url">Pays-Bas</country></affiliation></author><author><name sortKey="Socquet, A" sort="Socquet, A" uniqKey="Socquet A" first="A." last="Socquet">A. Socquet</name><affiliation wicri:level="1"><mods:affiliation>Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft, Netherlands</mods:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft</wicri:regionArea></affiliation><affiliation wicri:level="1"><mods:affiliation>Now at Institut de Physique du Globe de Paris (IPGP), Paris, France.</mods:affiliation><country xml:lang="fr">France</country><wicri:regionArea>Now at Institut de Physique du Globe de Paris (IPGP), Paris</wicri:regionArea></affiliation></author><author><name sortKey="Vigny, C" sort="Vigny, C" uniqKey="Vigny C" first="C." last="Vigny">C. 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Haji Abu</name><affiliation wicri:level="1"><mods:affiliation>Department of Survey and Mapping Malaysia (DSMM), Kuala Lumpur, Malaysia</mods:affiliation><country xml:lang="fr">Malaisie</country><wicri:regionArea>Department of Survey and Mapping Malaysia (DSMM), Kuala Lumpur</wicri:regionArea></affiliation></author><author><name sortKey="Promthong, Chaiwat" sort="Promthong, Chaiwat" uniqKey="Promthong C" first="Chaiwat" last="Promthong">Chaiwat Promthong</name><affiliation wicri:level="1"><mods:affiliation>Royal Thai Survey Department (RTSD), Bangkok, Thailand</mods:affiliation><country xml:lang="fr">Thaïlande</country><wicri:regionArea>Royal Thai Survey Department (RTSD), Bangkok</wicri:regionArea></affiliation></author><author><name sortKey="Subarya, C" sort="Subarya, C" uniqKey="Subarya C" first="C." last="Subarya">C. Subarya</name><affiliation wicri:level="1"><mods:affiliation>National Coordination Agency for Surveys and Mapping (BAKOSURTANAL), Cibinong, Indonesia</mods:affiliation><country xml:lang="fr">Indonésie</country><wicri:regionArea>National Coordination Agency for Surveys and Mapping (BAKOSURTANAL), Cibinong</wicri:regionArea></affiliation></author><author><name sortKey="Sarsito, D A" sort="Sarsito, D A" uniqKey="Sarsito D" first="D. A." last="Sarsito">D. A. Sarsito</name><affiliation wicri:level="1"><mods:affiliation>Institute of Technology Bandung (ITB), Bandung, Indonesia</mods:affiliation><country xml:lang="fr">Indonésie</country><wicri:regionArea>Institute of Technology Bandung (ITB), Bandung</wicri:regionArea></affiliation></author><author><name sortKey="Matheussen, S" sort="Matheussen, S" uniqKey="Matheussen S" first="S." last="Matheussen">S. Matheussen</name><affiliation wicri:level="1"><mods:affiliation>Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft, Netherlands</mods:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Delft Institute of Earth Observation and Space Systems (DEOS), Delft University of Technology, Delft</wicri:regionArea></affiliation></author><author><name sortKey="Morgan, P" sort="Morgan, P" uniqKey="Morgan P" first="P." last="Morgan">P. Morgan</name><affiliation wicri:level="1"><mods:affiliation>School of Computing, University of Canberra, Canberra, ACT, Australia</mods:affiliation><country xml:lang="fr">Australie</country><wicri:regionArea>School of Computing, University of Canberra, Canberra, ACT</wicri:regionArea></affiliation></author><author><name sortKey="Spakman, W" sort="Spakman, W" uniqKey="Spakman W" first="W." last="Spakman">W. Spakman</name><affiliation wicri:level="1"><mods:affiliation>Faculty of Earth Sciences, University of Utrecht, Utrecht, Netherlands</mods:affiliation><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Faculty of Earth Sciences, University of Utrecht, Utrecht</wicri:regionArea></affiliation></author></analytic><monogr></monogr><series><title level="j" type="main">Journal of Geophysical Research: Solid Earth</title><title level="j" type="alt">JOURNAL OF GEOPHYSICAL RESEARCH: SOLID EARTH</title><idno type="ISSN">0148-0227</idno><idno type="eISSN">2156-2202</idno><imprint><biblScope unit="vol">112</biblScope><biblScope unit="issue">B6</biblScope><biblScope unit="page-count">20</biblScope><date type="published" when="2007-06">2007-06</date></imprint><idno type="ISSN">0148-0227</idno></series></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0148-0227</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Active deformation</term><term>Active tectonics</term><term>Altamimi</term><term>Asia network</term><term>Asia region</term><term>Asian earth</term><term>Azimuth</term><term>Bako</term><term>Bellier</term><term>Black dots</term><term>Bock</term><term>Borneo</term><term>Borneo trench</term><term>Calais</term><term>Campaign sites</term><term>Central java</term><term>China block</term><term>Collision zone</term><term>Confidence level</term><term>Continental collision</term><term>Convergence</term><term>Crustal</term><term>Crustal deformation</term><term>Crustal motion</term><term>Curray</term><term>Daily solutions</term><term>Data analysis</term><term>Deformation</term><term>Deformation zone</term><term>Deforming</term><term>Earth planet</term><term>Eastern himalayan syntaxis</term><term>Eastern indonesia</term><term>Elastic deformation</term><term>Electronic supplement</term><term>Eurasia</term><term>Eurasian</term><term>Eurasian plate</term><term>Fernandes</term><term>Formal errors</term><term>Genrich</term><term>Geodetic</term><term>Geodyssea</term><term>Geodyssea project</term><term>Geol</term><term>Geophys</term><term>Great sumatran fault</term><term>High strain rates</term><term>Internal deformation</term><term>Interplate deformation</term><term>Iwakuni</term><term>Java</term><term>Java trench</term><term>Lett</term><term>Makassar</term><term>Makassar strait</term><term>Malaysia</term><term>Mangkalihat peninsula</term><term>Mccaffrey</term><term>Michel</term><term>Molnar</term><term>Myanmar</term><term>Northern sumatra</term><term>Oblique</term><term>Oblique plate convergence</term><term>Permanent stations</term><term>Plate boundaries</term><term>Plate boundary deformation</term><term>Plate convergence</term><term>Plate motions</term><term>Prawirodirdjo</term><term>Rangin</term><term>Reference frame</term><term>Relative motion</term><term>Relative vector</term><term>Residual</term><term>Residual vectors</term><term>Residual velocities</term><term>River fault</term><term>Rotation pole</term><term>Rotation vector</term><term>Sabah</term><term>Sagaing fault</term><term>Seismic</term><term>Seismic activity</term><term>Seismicity</term><term>Shear zone</term><term>Shen</term><term>Simon</term><term>Socquet</term><term>Southeastern part</term><term>Strain axis</term><term>Strain rates</term><term>Subarya</term><term>Subduction</term><term>Subduction zone</term><term>Sulawesi</term><term>Sumatra</term><term>Sumatran</term><term>Sunda</term><term>Sunda shelf</term><term>Sunda trench</term><term>Sundaland</term><term>Sundaland block</term><term>Sundaland block boundaries</term><term>Sundaland boundaries</term><term>Sundaland motion</term><term>System measurements</term><term>Tapponnier</term><term>Tectonic</term><term>Tectonics</term><term>Tensor</term><term>Thailand</term><term>Tibetan plateau</term><term>Time series</term><term>Trench</term><term>Undeformed</term><term>Undeformed sundaland block</term><term>Velocity estimates</term><term>Velocity field</term><term>Velocity vectors</term><term>Vigny</term><term>Wang</term></keywords><keywords scheme="Teeft" xml:lang="en"><term>Active deformation</term><term>Active tectonics</term><term>Altamimi</term><term>Asia network</term><term>Asia region</term><term>Asian earth</term><term>Azimuth</term><term>Bako</term><term>Bellier</term><term>Black dots</term><term>Bock</term><term>Borneo</term><term>Borneo trench</term><term>Calais</term><term>Campaign sites</term><term>Central java</term><term>China block</term><term>Collision zone</term><term>Confidence level</term><term>Continental collision</term><term>Convergence</term><term>Crustal</term><term>Crustal deformation</term><term>Crustal motion</term><term>Curray</term><term>Daily solutions</term><term>Data analysis</term><term>Deformation</term><term>Deformation zone</term><term>Deforming</term><term>Earth planet</term><term>Eastern himalayan syntaxis</term><term>Eastern indonesia</term><term>Elastic deformation</term><term>Electronic supplement</term><term>Eurasia</term><term>Eurasian</term><term>Eurasian plate</term><term>Fernandes</term><term>Formal errors</term><term>Genrich</term><term>Geodetic</term><term>Geodyssea</term><term>Geodyssea project</term><term>Geol</term><term>Geophys</term><term>Great sumatran fault</term><term>High strain rates</term><term>Internal deformation</term><term>Interplate deformation</term><term>Iwakuni</term><term>Java</term><term>Java trench</term><term>Lett</term><term>Makassar</term><term>Makassar strait</term><term>Malaysia</term><term>Mangkalihat peninsula</term><term>Mccaffrey</term><term>Michel</term><term>Molnar</term><term>Myanmar</term><term>Northern sumatra</term><term>Oblique</term><term>Oblique plate convergence</term><term>Permanent stations</term><term>Plate boundaries</term><term>Plate boundary deformation</term><term>Plate convergence</term><term>Plate motions</term><term>Prawirodirdjo</term><term>Rangin</term><term>Reference frame</term><term>Relative motion</term><term>Relative vector</term><term>Residual</term><term>Residual vectors</term><term>Residual velocities</term><term>River fault</term><term>Rotation pole</term><term>Rotation vector</term><term>Sabah</term><term>Sagaing fault</term><term>Seismic</term><term>Seismic activity</term><term>Seismicity</term><term>Shear zone</term><term>Shen</term><term>Simon</term><term>Socquet</term><term>Southeastern part</term><term>Strain axis</term><term>Strain rates</term><term>Subarya</term><term>Subduction</term><term>Subduction zone</term><term>Sulawesi</term><term>Sumatra</term><term>Sumatran</term><term>Sunda</term><term>Sunda shelf</term><term>Sunda trench</term><term>Sundaland</term><term>Sundaland block</term><term>Sundaland block boundaries</term><term>Sundaland boundaries</term><term>Sundaland motion</term><term>System measurements</term><term>Tapponnier</term><term>Tectonic</term><term>Tectonics</term><term>Tensor</term><term>Thailand</term><term>Tibetan plateau</term><term>Time series</term><term>Trench</term><term>Undeformed</term><term>Undeformed sundaland block</term><term>Velocity estimates</term><term>Velocity field</term><term>Velocity vectors</term><term>Vigny</term><term>Wang</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Malaisie</term><term>Birmanie</term><term>Thaïlande</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Bornéo</term><term>Java</term><term>Sulawesi</term><term>Sumatra</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract">A unique GPS velocity field that spans the entire Southeast Asia region is presented. It is based on 10 years (1994–2004) of GPS data at more than 100 sites in Indonesia, Malaysia, Thailand, Myanmar, the Philippines, and Vietnam. The majority of the horizontal velocity vectors have a demonstrated global accuracy of ∼1 mm/yr (at 95% confidence level). The results have been used to (better) characterize the Sundaland block boundaries and to derive a new geokinematic model for the region. The rotation pole of the undeformed core of the Sundaland block is located at 49.0°N–94.2°E, with a clockwise rotation rate of 0.34°/Myr. With respect to both geodetically and geophysically defined Eurasia plate models, Sundaland moves eastward at a velocity of 6 ± 1 to 10 ± 1 mm/yr from south to north, respectively. Contrary to previous studies, Sundaland is shown to move independently with respect to South China, the eastern part of Java, the island of Sulawesi, and the northern tip of Borneo. The Red River fault in South China and Vietnam is still active and accommodates a strike‐slip motion of ∼2 mm/yr. Although Sundaland internal deformation is general very small (less than 7 nanostrain/yr), important accumulation of elastic deformation occurs along its boundaries with fast‐moving neighboring plates. In particular in northern Sumatra and Malaysia, inland‐pointing trench‐perpendicular residual velocities were detected prior to the megathrust earthquake of 26 December 2004. Earlier studies in Sumatra already showed this but underestimated the extent of the deformation zone, which reaches more than 600 km away from the trench. This study shows that only a regional Southeast Asia network spanning thousands of kilometers can provide a reference frame solid enough to analyze intraplate and interplate deformation in detail.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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