Eucrites and diogenites are depleted in many volatile elements, but the depletions of many volatile siderophile elements are not well constrained. Although previous work indicated that the Vestan core equilibrated with its mantle in a global melting event, the possible contribution of core formation ...
In this paper, the distribution, abundance and occurrence states of U in mantle xenoliths are studied by ~(235)U fission track method, and the movement of mantle fluids is revealed by means of U-tracer, which is a representative of incompatible elements in the mantle. 在此基础上进一步把铀...
Within these constraints, the same equations for partial melting and crystallization which have been used to such advantage for trace elements may be used for major elements. Calculated MgO and FeO abundances in a mantle-melt system are used as an example of the modelling technique. Such ...
The mantle xenoliths in the Quaternary Changbaishan Volcano in southern Jilin Province contain spinel-facies lherzolites. The equilibration temperatures for these samples range from 902°C to 1064°C based on the two-pyroxene thermometer of Brey and Khler (1990), and using the oxybarometry of Nel...
The study of REE distribution in the clay fraction of sedimentary rocks from two coalfields made it possible to distinguish several types of REE distribution, which correlate with their mineral composition. It is shown that the REE fractionation was related to the mineral reconstruction of the prima...
Keep in mind, the elemental composition of the Earth's crust is not the same as the composition of the Earth. The mantle and core account for significantly more mass than the crust. The mantle is about 44.8% oxygen, 21.5% silicon, and 22.8% magnesium, with iron, aluminum, calcium, sodiu...
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Non-chondritic distri- bution of the highly siderophile elements in mantle sulphides. Nature 407, 891-894.Alard, O., Griffin, W. L., Lorand, J. -P., Jackson, S. E. & O'Reilly, S. Y. 2000. Non-chondritic distribution of the highly siderophile elements in mantle sulphides. Nature...
Glasses from DSDP Leg 24, site 238 (Indian Ocean) have a somewhat peculiar trace element pattern, but this is thought to reflect secondary processes operating at shallow depth, not an anomalous source region in the mantle. Our data rather indicate that heterogeneities in the mantle are confined...
Platinum-group elements (PGE) had long been considered as immobile elements, which is commonly used to trace the mantle source and the evolution of ultra-mafic and mafic magmas. However, increasing field observations and high-temperature and high-pressure experiments suggested that PGE might be mobi...