2021-10-25
Some geophysical parameters of the Earth's mantle
The mantle is the part of the Earth (geosphere) located directly below the crust and above the core. The mantle is located in the range from 30 to 2900 km from the earth's surface and occupies about 80% of the entire volume of our planet.
The reference table presents the geophysical data of oxides that make up the Earth's mantle in percentage terms. Only those substances are indicated, the occurrence of which is more than 1%.
| Oxides name | SiO2 | MgO | FeO | Fe2O3 | Al2O3 | CaO |
| Mass fraction,% | 45.5 | 38.35 | 4.37 | 4.15 | 3.67 | 2.28 |
| ε | 3.9 | 9.65 | ~ 14 | ~ 100 | 9.5 | 11.8 |
| μ | ~1 | - | - | - | 1.8 | ~1 |
| ρ, Ohm*m | 1011 -1013 | 1012 -1013 | 1011 -1013 | 1011 -1013 | 1010 -1018 | 1015 -1018 |
| Density, g/cm3 | 2.2-2.6 | 3.58 | 5.745 | 5.242 | 3.99 | 3.37 |
In this table: ε - is the relative dielectric constant, μ - relative magnetic permeability, ρ - specific electrical volume resistance.
Materials used
- O.G. Sorokhtin, S.A. Ushakov. Development of the Earth. M: Publishing house of Moscow State University, 2002. 506 p.
- B.P. Nikolsky. Chemist's Handbook (in 7 volumes). 1966.
- A.M. Abyzov. Aluminum oxide and alumina ceramics. Part 1. 2019.
- O.V. Styazhkin. A simple mechanism for generating a geomagnetic field. 2011.
- Dielectric constant of solids. Table 3.9.3 .
- Dielectric Constant Values | dixonvalve.com. [PDF] | [PDF].