Whole-mantle convection and plate tectonics
نویسندگان
چکیده
منابع مشابه
The generation of plate tectonics from mantle convection
In the last decade, significant progress has been made toward understanding how plate tectonics is generated from mantle dynamics. A primary goal of plate-generation studies has been the development of models that allow the top cold thermal boundary layer of mantle convection, i.e. the lithosphere, to develop broad and strong plate-like segments separated by narrow, weak and rapidly deforming b...
متن کاملHow mantle slabs drive plate tectonics.
The gravitational pull of subducted slabs is thought to drive the motions of Earth's tectonic plates, but the coupling between slabs and plates is not well established. If a slab is mechanically attached to a subducting plate, it can exert a direct pull on the plate. Alternatively, a detached slab may drive a plate by exciting flow in the mantle that exerts a shear traction on the base of the p...
متن کاملPlate tectonics and convection in the Earth's mantle: toward a numerical simulation
Plate tectonics is a kinematic description of Earth that treats the outer shell of its mantle as a number of plates or rigid spherical caps that move with respect to each other (see the “Plate tectonics” sidebar). The mantle is the outer, solid 3,000-km-thick shell that overlies Earth’s fluid outer core. An enormous amount of geological and geophysical data has gone into determining the motion ...
متن کاملThe Quest for Self-Consistent Generation of Plate Tectonics in Mantle Convection Models
Plate tectonics and mantle convection are different aspects of the same, coupled system, yet mantle convection calculations do not exhibit plate tectonic behavior unless it is imposed by the modeler. This paper explores the quest for self-consistent incorporation of plate tectonics into mantle convection models, and presents new results and parameterizations. Simulations of convection with buoy...
متن کاملModels of Mantle Convection Incorporating Plate Tectonics: The Australian Region since the Cretaceous
We propose that the anomalous Cretaceous vertical motion of Australia and distinctive geochemistry and geophysics of the Australian-Antarctic Discordance (AAD) were caused by a subducted slab which migrated beneath the continent during the Cretaceous, stalled within the mantle transition zone, and is presently being drawn up by the Southeast Indian Ridge. During the Early Cretaceous the eastern...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 1977
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.1977.tb03717.x