Dynamic and static compressibility of glasses and the increase of density with depth in the earth’s interior |
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| Authors: | P Moser W Kuhn H J Kuhn |
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| Institution: | 1. Physical Chemistry Institute, University of Basel, Basel, Switzerland
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| Abstract: | It is shown, using an organic and an inorganic glass, that, in a relaxing material, the compressibility consists of two parts, an instantaneous (dynamic) part and a delayed part. The instantaneous part amounts to about 2/3 of the total (static) compressibility. From consideration of relaxation times it is seen that, in the mantle of the earth, the density has to be calculated using the static compressibility, while seismic velocity curves give the dynamic value. Density curves are calculated on the basis of an essentially homogeneous earth interior derived from hot solar material. |
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