New Concepts in Ophiolites, Oceanic Lithosphere and Podiform Chromites - ScienceDirectPlate tectonics is the most spectacular geodynamic event on Earth, and is fundamentally related to large-scale volcanic activity and earthquake, sea-land changes, tremendous orogeny and plateau formation. Ophiolites are...
However, the data also revealed many features that the theory did not anticipate – mid-ocean ridges that propagated into old, thick oceanic lithosphere; spreading centers that overlapped (sometimes forming microplates that rotate rapidly between larger plates for a few million years); and a very ...
Typical continental arcs occur at the western margin of the North and South American, and the Sunda arc in the northeastern margin of the Indian Ocean, where oceanic lithosphere is subducted beneath continental lithosphere without a marine basin behind the volcanic arc; rather, the arc is built ...
is created independently of indirect proxy records and far-field sea-level records. This allows us to investigate two of the most contentious problems when assessing past ice sheet configuration and sea level. First, our reconstruction can achieve the sea-level lowstand observed in many far-field ...
while the lithosphere thickness and upper mantle viscosity are the same as used in the NAICE North America reconstruction13. The lower mantle viscosity is compatible with a best-fitting solution in far-field regions31, but is higher than values used in prior North American GIA-based ice sheet ...
Geodynamics of oceanic plateau and plume head accretion and their role in Phanerozoic orogenic systems of China[J]. Geoscience Frontiers, 2015, 6(1): 49-59. DOI: 10.1016/j.gsf.2014.07.002 [10] Michael Brown. The contribution of metamorphic petrology to understanding lithosphere evolution and ...
The present-day structure of the crust, completed by the structure of the lithosphere, e.g. with the 3-D seismic tomography visualization, allows to verify the region's geodynamic evolution. The 3-D visualization (and the correlation with the heat flow thematic layer) reconfirms the preferred...
region is increasing, new concepts and integrated data sets have to be employed for modelling its tectonic evolution. In particular, mantle-lithosphere connections may hold some of the keys to deciphering the timing and mechanisms of opening and closing oceanic basins for the last 200 million years...
(z,∞) is the equilibrium lithosphere temperature after thermal perturbation; tc is initial crust thickness;ρw is seawater density;ρc is crust density;ρm is mantle density; α is the coefficient of thermal expansion; Tm is the temperature at the bottom of the lithosphere; β is a crustal...
Reheating of old oceanic lithosphere: deductions from observations Earth Planet. Sci. Lett. (1996) D.W. Forsyth The evolution of the upper mantle beneath mid-ocean ridges Tectonophysics (1977) B.J. Wood et al. The role of lithospheric phase transitions on seafloor flattening at old ages Earth...