Physics of the Earth & Planetary InteriorsHama, J., Suito, K. (2001) Thermoelastic Models of Minerals and the Composition of the Earth’s Lower Mantle. Phys. Earth Planet. Inter. 125: pp. 147-166Hama J, Suito K (2001) Thermoelastic models of minerals and the composition of the Earth'...
The composition of the lower mantle—comprising 56% of Earth’s volume—remains poorly constrained. Among the major elements, Mg/Si ratios ranging from ∼0.9–1.1, such as in rocky Solar-System building blocks (or chondrites), to ∼1.2–1.3, such as in upper-mantle rocks (or pyrolite...
structure of the Earth comprises an upper and lower mantle of similar composition, an Fe Ni core having between 5% and 15% of a low-atomic-weight element, and a mantle which, when compared to CI carbonaceous chondrites, is depleted in Mg and Si relative to the refractory lithophile ...
RECENTLY, Birchreported data on the density and composition of the mantle and core. He wrote: ``The resulting densities in the lower mantle are found to be in good agreement with shock-wave measurements on rocks having FeO contents in the range 10 +/- 2% by weight ... except for iron ...
B. It is a layer with very low temperature. C. It is a semi - molten and ductile layer. D. It is mainly made of gas. 相关知识点: 试题来源: 解析 C。解析:软流圈(asthenosphere)是上地幔(upper mantle)的一部分,它不是完全固态和刚性的(A错误),它是一种半熔融、具有韧性的层,这里的物质...
The plate tectonic cycle produces chemically distinct mid-ocean ridge basalts and arc volcanics, with the latter enriched in elements such as Ba, Rb, Th, Sr and Pb and depleted in Nb owing to the water-rich flux from the subducted slab. Basalts from back
By continuing to browse the site you are agreeing to our use of cookies. Find out more. Search Advanced and citation search Within current journal Entire site Home > List of Issues > Table Of Contents > Book Review of Earth's Core and Lower Mantle, edited by C.A. Jones, A.M. ...
The structure of the Earth is divided into four major parts: that is the crust, then the mantle, next is the outer core, and then the inner core. Each of these layers has a unique chemical composition. The movement in the mantle is generally caused by variations in heat from the core ...
The chemical composition of the Earth, the Moon and chondritic meteorites Katherine H Joy and Tomoko Arai discuss the evidence from lunar meteorites about the shared history of Earth and the Moon. P Gast 被引量: 13发表: 1972年 The Mineral Composition of the Earth's Crust, Mantle, Meteorites...
E. The Earth’s Density (CRC, 1975). Ringwood, A. E. Composition and Petrology of the Earth’s Mantle (McGraw Hill, 1975). Ita, J. & Stixrude, L. Petrology, elasticity, and composition of the mantle transition zone. J. Geophys. Res. Solid Earth 97, 6849–6866 (1992). Article ...