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High Vp/Vs ratio: Saturated cracks or anisotropy effects?

Wang, X-Q; Schubnel, Alexandre; Fortin, Jerome; David, Emmanuel; Gueguen, Yves; Ge, H-K


We measured Vp/Vs ratios of thermally cracked Westerly granite, thermally cracked Carrara marble and 4% porosity Fontainebleau sandstone, for an effective mean pressure ranging from 2 to 95 MPa. Samples were fluid-saturated alternatively with argon gas and water (5 MPa constant pore pressure). The experimental results show that at ultrasonic frequencies, Vp/Vs ratio of water saturated specimen never exceeded 2.15, even at effective mean pressure as low as 2 MPa, or for a lithology for which the...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Geophysical Research Letters
DOI: 10.1029/2012GL051742


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