scholarly journals An elastic plate model for interseismic deformation in subduction zones

2010 ◽  
Vol 115 (B3) ◽  
Author(s):  
Ravi V. S. Kanda ◽  
Mark Simons
Keyword(s):  
Elastic Plate ◽  
Subduction Zones ◽  
Plate Model ◽  
Interseismic Deformation

scholarly journals Coupling between the ocean and an ice shelf

1991 ◽  
Vol 15 ◽  
pp. 101-108 ◽  
Author(s):  
Colin Fox ◽  
Vernon A. Squire
Keyword(s):  
Elastic Plate ◽  
Velocity Potential ◽  
Open Water ◽  
Ocean Waves ◽  
Ocean Wave ◽  
Single Frequency ◽  
Plate Model ◽  
Ice Shelf ◽  
Long Period ◽  
Set Up

The possibility of long-period ocean waves coupling to an ice shelf is investigated. A thick elastic plate model is used for the ice shelf with comparisons made to the simpler thin-plate model. The strain set up on the ice shelf by a normally incident single frequency ocean wave is calculated by completely solving the equations governing the velocity potential for such a system. In the absence of measurements on an ice shelf, existing measurements of long-period strain on an ice tongue are used to estimate the required incident amplitude in the open water to induce the observed oscillations. It is found that the height of seas required indicates that ocean wave driving is a plausible forcing mechanism for observed oscillations.

scholarly journals Modelling and analysis of acoustic field in a rectangular enclosure bounded by elastic plates under the excitation of different point force

2017 ◽  
Vol 36 (1) ◽  
pp. 43-55 ◽  
Author(s):  
Huaifeng Cui ◽  
Rufu Hu ◽  
Nan Chen
Keyword(s):  
Acoustic Field ◽  
Elastic Plate ◽  
Acoustic Mode ◽  
Plate Model ◽  
Elastic Plates ◽  
Analysis Method ◽  
Energy Resonance ◽  
Acoustic Coupling ◽  
The One ◽  
Structural Mode

The coupled acoustic field of fully elastic plate model is described by the modal analysis method. The acoustic potential energy resonance peaks of the fully elastic plate model are significantly more than that of the one elastic plate model due to the influence of the vibration of multi elastic plates. The acoustic field characteristics of the fully elastic plate model are analyzed when the primary excitation source is applied on the different elastic plates. The results show that the coupled acoustic field of the fully elastic plate model is dominated by the structural mode of the elastic plate with primary excitation, and the acoustic mode of the enclosure, and the structural-acoustic coupling between the plate and the enclosure; the structure modes of the other elastic plates have less effects on the acoustic field in the enclosure except the first ones of them.

A non-linear elastic plate model of moderate thickness: Existence, uniquenness and duality

1996 ◽  
Vol 42 (3) ◽  
pp. 243-273 ◽  
Author(s):  
W?odzimierz Robert Bielski ◽  
J�zef Joachim Telega
Keyword(s):  
Elastic Plate ◽  
Plate Model ◽  
Linear Elastic ◽  
Non Linear

scholarly journals The Cretaceous and Cenozoic tectonic evolution of Southeast Asia

Solid Earth ◽  
2014 ◽  
Vol 5 (1) ◽  
pp. 227-273 ◽  
Author(s):  
S. Zahirovic ◽  
M. Seton ◽  
R. D. Müller
Keyword(s):  
South China Sea ◽  
Southeast Asia ◽  
Subduction Zone ◽  
South China ◽  
Subduction Zones ◽  
The South China Sea ◽  
Plate Boundaries ◽  
Plate Model ◽  
The South ◽  
China Sea

Abstract. Tectonic reconstructions of Southeast Asia have given rise to numerous controversies that include the accretionary history of Sundaland and the enigmatic tectonic origin of the proto-South China Sea. We assimilate a diversity of geological and geophysical observations into a new regional plate model, coupled to a global model, to address these debates. Our approach takes into account terrane suturing and accretion histories, the location of subducted slabs imaged in mantle tomography in order to constrain the evolution of regional subduction zones, as well as plausible absolute and relative plate velocities and tectonic driving mechanisms. We propose a scenario of rifting from northern Gondwana in the latest Jurassic, driven by northward slab pull from north-dipping subduction of Tethyan crust beneath Eurasia, to detach East Java, Mangkalihat, southeast Borneo and West Sulawesi blocks that collided with a Tethyan intra-oceanic subduction zone in the mid-Cretaceous and subsequently accreted to the Sunda margin (i.e., southwest Borneo core) in the Late Cretaceous. In accounting for the evolution of plate boundaries, we propose that the Philippine Sea plate originated on the periphery of Tethyan crust forming this northward conveyor. We implement a revised model for the Tethyan intra-oceanic subduction zones to reconcile convergence rates, changes in volcanism and the obduction of ophiolites. In our model the northward margin of Greater India collides with the Kohistan–Ladakh intra-oceanic arc at ∼53 Ma, followed by continent–continent collision closing the Shyok and Indus–Tsangpo suture zones between ∼42 and 34 Ma. We also account for the back-arc opening of the proto-South China Sea from ∼65 Ma, consistent with extension along east Asia and the formation of supra-subduction zone ophiolites presently found on the island of Mindoro. The related rifting likely detached the Semitau continental fragment from South China, which accreted to northern Borneo in the mid-Eocene, to account for the Sarawak Orogeny. Rifting then re-initiated along southeast China by 37 Ma to open the South China Sea, resulting in the complete consumption of proto-South China Sea by ∼17 Ma when the collision of the Dangerous Grounds and northern Palawan blocks with northern Borneo choked the subduction zone to result in the Sabah Orogeny and the obduction of ophiolites in Palawan and Mindoro. We conclude that the counterclockwise rotation of Borneo was accommodated by oroclinal bending consistent with paleomagnetic constraints, the curved lithospheric lineaments observed in gravity anomalies of the Java Sea and the curvature of the Cretaceous Natuna paleo-subduction zone. We complete our model by constructing a time-dependent network of topological plate boundaries and gridded paleo-ages of oceanic basins, allowing us to compare our plate model evolution to seismic tomography. In particular, slabs observed at depths shallower than ∼1000 km beneath northern Borneo and the South China Sea are likely to be remnants of the proto-South China Sea basin.

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