Finally, we discuss the likelihood that mantle convection has been going on through the entire life of the earth, beginning with the early formation of the core; this has obvious geological implications.doi:10.1029/JB084iB01p00147Elsasser, Walter M....
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...
Using the minera... M Obata - 《Journal of Petrology》 被引量: 14发表: 1980年 Transformation Kinetics in the Earth's Interior Transformations of mantle minerals have a great effect on the dynamics of the descending oceanic plate through metastable reactions and changes in the micr... Tomoaki,...
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...
Carbon in the upper mantle controls incipient melting of carbonated peridotite and so acts as a critical driver of plate tectonics. The carbon-rich melts that form control the rate of volatile outflux from the Earth’s interior, contributing to climate e
(2) mantle anomalies, and the mass excess of the deeper portions of plate convergent zones, expressed principally in coefficients of harmonic degrees 4 through 10; (3) upper mantle mass anomalies in the outer 600 km of the earth revealed by residual geoid anomalies from radar altimeter ...
Through numerical modeling, we tested the broad penetration, necking, lateral ponding, foundering and aborting of different plumes influenced by viscosity and density boundaries at ∼1000 km depth in the Earth's mantle to investigate the controlling factors of different slow-velocity anomalies near th...
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。[...
However, the thickness of the lithosphere did not decrease, and only the rate of lithospheric thinning decreased owing to the formation of the mushroom structure of the mantle. As a result, the lithospheric structure in the region is notably different from those in its surrounding regions. The ...
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。