Core of the Earth - - Iron-Nickel Alloydoi:10.1080/00357529.1965.11765788Taylor & FrancisRocks & Minerals
WE have searched for silicon in the metal phase of several iron meteorites in an attempt to test those Earth models which assume that silicon occurs as a major component in the core of the Earth 1,2 . The experimental technique was activation analysis, based on the fast neutron reaction 28...
Seismological studies, suggest that there is 3-4% anisotropy of P-waves in the Earth's inner core. Hexagonal closed-packed solid iron has been proposed to be the major constituent of the inner core, but a lack of knowledge about the elastic properties of this phase at inner-core pressures...
The Earth's core is mainly composed of _. A. Iron and nickel B. Silicon and oxygen C. Aluminum and magnesium D. Calcium and potassium 相关知识点: 试题来源: 解析 A。解析:地球的核心主要由铁和镍组成。选项A正确。选项B中的硅和氧是地壳中较为常见的元素组成。选项C中的铝和镁不是地核的主...
An iron core-type earthing structure of a big pie and a core column of a reactor comprises an upper big pie, a lower big pie, an iron core pie, a core column ground screen, a core column ground screenearthing lead wire and a coil. The structure is characterized in that an opening ...
The inner core of the Earth is mainly composed of _. A. molten rock B. solid iron and nickel C. gas D. water 相关知识点: 试题来源: 解析 B。解析:地球的内核主要由固态的铁和镍组成。选项A,熔融的岩石主要存在于地幔中,而非内核;选项C,地球内核不是由气体组成的;选项D,水不可能是地球内核的...
A new model explains how the newly born Earth's iron core formed as dribs and drabs of iron percolated inward from the planet's lower mantle.
According to the study, the "snow" in the Earth's core is made of tiny particles of iron -- much heavier than any snowflake on the planet's surface -- that fall from the molten outer core and pile on top of the inner core, creating layers up to 320 km thick that cover the inner...
The Earth's core is mainly made up of ___. A. silicon and oxygen B. iron and nickel C. magnesium and iron 相关知识点: 试题来源: 解析 B。解析:地球的地核主要由铁和镍组成。硅和氧是地壳中含量较多的元素,镁和铁不是地核主要的组成成分。反馈...
(1998) The viscosity of liquid iron at the physical conditions of the Earth's core, Nature 392, 805-807.G. A. de Wijs, G. Kresse, L. Vocˇadlo et al., "The viscosity of liquid iron at the physical conditions of the Earth's core," Nature, vol. 392, no. 6678, pp. 805-807,...