Correlation of core and downhole seismic velocities in high-pressure metamorphic rocks: a case study for the COSC-1 borehole, Sweden
Felix Kästner et al.
COSC-1 operational report - Operational data sets (V. 1.2)H. Lorenz, J.-E. Rosberg, C. Juhlin, L. Bjelm, B. Almqvist, T. Berthet, R. Conze, D. G. Gee, I. Klonowska, C. Pascal, K. Pedersen, N. Roberts, and C. Tsang https://doi.org/10.5880/ICDP.5054.002
Knowledge about physical properties at depth is crucial to image and understand structures linked with orogenic processes. We examined seismic velocities from core and downhole data from the COSC-1 borehole, Sweden, and calibrated our results with laboratory measurements on core samples. Despite a strong mismatch between the core and downhole velocities due to microcracks, mafic units are resolved at all scales, while at sample scale, strong seismic anisotropy correlates with the rock foliation.
Knowledge about physical properties at depth is crucial to image and understand structures...