Age: Younger:Oceanic crust is generallyyounger than continental crust. The oldest oceanic crust is about200 million years old, found in the western Pacific Ocean, whereas some parts of the continental crust are over 4 billion years old. Lifespan:Oceanic crust iscontinuously renewed, preventing the...
A combination of methods and datasets were used to map and reconstruct preserved and subducted oceanic regions. A wealth of geophysical datasets (seismic profiles, magnetic anomalies and gravity anomaly derived from satellite altimetry) were used to derive the age of oceanic crust, spreading rates, ...
R. Age, spreading rates, and spreading asymmetry of the world’s ocean crust. Geochem. Geophys. Geosyst. 9, Q04006 (2008). Google Scholar Parsons, B. & Sclater, J. G. An analysis of the variation of ocean floor bathymetry and heat flow with age. J. Geophys. Res. 82, 803–827...
While it is important to recognize the influence of other palaeogeographic features, such as the Central Pangaean Mountains (Fig.1a), on continental weathering, constructing a fully integrated Earth system model is beyond the scope of our study. Consequently, our estimated phosphorus fluxes for this...
Retreating subduction zones such as the Lesser Antilles, Gibraltar and Scotia have been migrating towards the Atlantic Ocean by cutting their way through the oceanic crust. This spontaneously retreating subduction is enabled by the development of faults at the edges of the slab, but the physical mec...
(FAB) type tholeiitic melt parental to the crustal lithologies was extracted from the upwelling asthenospheric mantle at SSZ fore-arc extensional regime thereby rendering a refractory re- sidual upper mantle; (ii) the crust and upper mantle of the SSZ fore arc were progressively refertilised ...
Watkins, N. D., McDougall, I., and Nougier, J., 1975, Paleomagnetism and potassium–argon age of St. Paul Island, southeastern Indian Ocean: contrasts in geomagnetic secular variation during the Brunhes epoch,Earth Sci. Planet. Lett, 24, p. 337–459. ...
(1) determining the age of the normal oceanic crust in the northern Caroline Plateau, and revealing the location and shape of the Caroline-Pacific plate boundary; (2) establishing stratigraphic time frame based on seismic stratigraphy in combination with drilling, and identifying the occurrence time...
We identified concordant Archaean xenocrystic zircons ranging in age between 2.5 and 3.0 Ga within a trachyte plug that crosscuts Older Series plume-related basalts of Mauritius. Our results demonstrate the existence of ancient continental crust beneath Mauritius; based on the entire spectrum of U...
As proposed in this study, petit-spot hydrothermal activity has the potential to be habitable zones for chemosynthetic bacteria on old and cold oceanic crust and should form the deepest example of a hydrothermal field known to date. Because presently active petit-spot hydrothermal fields have not ...