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- W2368975495 abstract "On the basis of a study of the occurance and genetic patterns of germanium in theLate Carboniferous,Early Permian and Jurassic coal formations of a certain area,it isproved that germanium in coal is of inhomogeneous distribution.In coal beds of thesame horizon with negligible changes of thickness and structure as well as types of coalpetropraphy,the horizontal variation of germanium content within the whole mining dis-trict is not significant.But vertically the germanium often concentrate in the subseamsnear the top and foot walls of the formation.Going down from the top and up fromthe bottom,however,the germanium content in coal becomes progressively reduced.Thegermanium content in seams at the upper and lower parts of the coal formation is higheras compared with these in the middle section.The germanium content in coals of dif-ferent petrographical species is found to be decreasing in the following order:shing coal——semi-shing coal——semi-dull coal——dull coal.The germanium in coal is associatedwith pyrite,but appears mostly in the organic portions,mainly in vitrains,and both thehand sorted and heavy-fluid separated vitrains are noted by their high germanium con-tent.Germanium is easily extracted with humic acids by oxidation with 20% H_2O_2,andextraction with 5% KOH.It is suggested that germanium in the organic matters of coalusually assumes an adsorped state of occurance.From the variation of germanium con-tent in coal beds of different geological ages,and upon the study of the original coal-forming materials,it is deduced that the germanium occurance in coal is the result of in-tensive absorption of germanium by the primitive plants on the one hand,and is alsoto be related to the weathering denudation on the other hand.The patterns of ger-manium concentration in coal are chiefly controlled by the oscillative movement of theearth crust and the subsequent changes in the accumulative conditions of coal-formingmaterials as well as the environmental changes." @default.
- W2368975495 created "2016-06-24" @default.
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- W2368975495 date "1965-01-01" @default.
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- W2368975495 title "SOME GENETIC PATTERNS OF GERMANIUM IN A COAL-BEARING DISTRICT" @default.
- W2368975495 hasPublicationYear "1965" @default.
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