Attenuation in fine-grained marine sediments: extension of the biot-stoll model by the 'etffective grain model' (DEGM)

摘要

It is postulated that the presence of swelling caly minerals in unconsolidated fine-grained saturated ma- ring sediments leads to deviations from the normally as- sumed ideal elasticity of the solid phase. In the proposed "effective grain model" (EGM), the elastic grain ma- terial is consequently replaced by an effective medium made up of a homogeneous elastic mineral phase that is isotropically intersperse with cylindrical, "penny- shaped" inclusions of low aspect ratio representing the intracrystalline water layers in the swelling clay minerals.