Depth of the upper mantle discontinuities beneath the East Pacific Rise, Geophys. Res. Lett., 23, 3369-3372.Lee, D.-K., and S. Grand (1996), Depth of upper mantle discontinuities beneath the East Pacific Rise, Geophys. Res. Lett., 23, 3369 - 3372....
A transport mechanism for these minerals is suggested via dunite channels along a mantle adiabat in the focused convective flow below the spreading centre. This mechanism brought these deep mantle phases into the ultramafic part of the NOC. These observations suggest that some part of the mantle ...
The depth extents of both regional and plate-scale processes within the upper mantle can be assessed by using the 410 and the 660 discontinuities to determine if these processes extend to the base of the upper mantle. Plate-scale processes have been proposed to extend to the core-mantle bounda...
The strong control that the endothermic phase change from spinel to perovskite and magnesiowüstite at a depth of 660 km has on mantle convection is discussed. The phase transition determines the morphology and length scales of upflow and downflow structures and, through retardation of sinking slabs...
in the depth of 听听怎么读 英[in ðə depθ ɔv] 美[ɪn ði dɛpθ ʌv] 是什么意思 释义 在…里面; 学习怎么用 权威例句 Subduction and the depth of convection in the Mediterranean mantle Systematic variation in the depths of slabs beneath arc volcanoes...
1. The top depth of upper mantle and deep tectonic characteritics in Northeastern China is studied in this paper by means of the Bouguer gravity anomaly map With the ratio of one to a million. 利用1/100万布格重力异常图,进行了东北地区上地幔顶部深度及其深部构造特征的研究。
Finite element numerical modeling has been carried out in order to investigate the effect of the depth- and temperature-dependent viscosity on the thermal convection occurring in the Earth's mantle. Calculations were made in a 2D spherical shell domain applying Boussinesq approximation. It was establi...
Variation of Icelandic and Hawaiian magmatism: evidence for co-pulsation of mantle plumes? Based on published estimates of areal extent, thickness and dating of igneous rocks related to formation of the North Atlantic Volcanic Province, we calcul... R Mjelde,JI Faleide - 《Marine Geophysical Resea...
Considering the various plume behaviors at this proposed boundary, we show that Earth's mantle is likely heterogeneously stratified at ∼1000 km depth, with regional viscosity and/or density changes of different lateral scales and vertical gradients. We speculate that this boundary separates the ...
aThe depth of low-velocity layers of Songliao basin ranges from 20 to 40 km in the crust, and 60 to 90 km in the upper mantle. A minimum depth is found in Qiqihar-Harbin area. 松辽盆地低速度层的深度从20到40公里和60到90公里在外壳在上地幔范围。 极小的深度在Qiqihar哈尔滨地区被找到。[...