Acta Geodynamica et Geomaterialia

Title: PETROPHYSICAL PROPERTIES OF THE PECHEN ROCKS OF THE DIFFERENT METAMORPHIC FACIES
Authors: Gorbatsevich Feliks F. and Trishina Ol'ga M.
DOI: 10.13168/AGG.2017.0022
Journal: Acta Geodynamica et Geomaterialia, Vol. 14, No. 4 (188), Prague 2017
Full Text: PDF file (1.6 MB)
Keywords: Pechenga complex, rocks, metamorphism, physical properties, anisotropy.
Abstract: Using rocks composing the Pechenga complex geologic and petrographic peculiarities, metamorphism and physical properties of rocks from prehnite-pumpellyite to amphibolite facies have been studied. The study showed that the rock densities increase from prehnite-pumpellyite to amphibolite facies (earth's surface). Rocks of epidote-amphibolite and amphibolite facies (earth's surface) showed the lowest velocities of compression waves. The values of velocity as well as density under depth conditions tend to increase from prehnite-pumpellyite to amphibolite facies. A new quantitative method – acoustopolariscopy was used to distinguish rocks of different facies of metamorphism.The data obtained (density, velocity characteristics, elastic moduli and Poisson's ratios) reflect the actual properties of the massif rocks and can be used for geophysical investigations and technical calculations in mining.