Oceanic crust: Age of hydro- thermal alteration. Geophys. Res. Lett., 5:1009-1012.Hart,SR,Staudigel,H.Oceanic crust: Age of hydrothermal alteration. Geophysical Research Letters . 1978Hart S R , Staudigel H. Oceanic crust : Age of hydrot her2 mal alteration[J ] . Geop hys Res Let ...
oceanic crust 听听怎么读 英[ˌəuʃiˈænik krʌst] 美[ˌoʃiˈænɪk krʌst] 是什么意思 释义 洋底壳; 英英释义 Oceanic crust Age of oceanic crust. The red is most recent, and blue is the oldest. 以上来源于:Wikipedia...
oceanic crust This, combined with the young age of theoceaniccrust, explains why few craters are likely to be found in the oceans. From theCambridge English Corpus The detached amphibolitizedoceaniccrustmay then return to shallow depths as a result of its positive buoyancy against the denser sur...
oceanic crust This, combined with the young age of the oceaniccrust, explains why few craters are likely to be found in the oceans. The detached amphibolitized oceaniccrust may then return to shallow depths as a result of its positive buoyancy against the denser surrounding mantle. The ba...
(the intrusive form of basalt) and ultramafic cumulates. The crust forms through partial melting of upwelling mantle beneath mid-ocean spreading centers; the layering results from differentiation of the basaltic magma produced by this melting. On Earth, the age of oceanic crust ranges from zero ...
Formation:Oceanic crust forms continuously at mid-ocean ridges through the upwelling of molten rock from the mantle. Features:Characterized by oceanic trenches, volcanic islands, and seamounts. Age:The oceanic crust is relatively young, with the oldest parts being about 200 million years old. ...
It has been widely accepted that upper crustal seismic velocities gradually increase from low values in the youngest crust to typical crustal velocities (5.2 km s1) over a period of 3040 million years, with a corresponding decrease in the observed heat flow deficiency caused by hydrothermal circulat...
Porosity in the oceanic crust is one of the most important factors influencing measured seismic velocities. Porosity is particularly important in the uppermost young crust, where rapid variations in velocities with depth and crustal age are observed. Knowledge of the concentration and aspect ratios of...
Oceanic crustis created asmagmarises to fill the gap between divergingtectonic platesand is consumed insubduction zones. It is geologically young, with a mean age of 60Ma, and is thin, averaging 6.5km in thickness. Oceanic crust consists almost exclusively of extrusivebasaltand its intrusive equiv...
Oceanic crust, the outermost layer of Earth’s lithosphere that is found under the oceans and formed at spreading centres on oceanic ridges, which occur at divergent plate boundaries. Oceanic crust is about 6 km (4 miles) thick. It is composed of several