Diorite (monzodiorite) (ID:049) GEOLOGICAL CLASSIFICATION (Genetic classification) Introductory This sample is an igneous rock. It is composed of quartz, feldspar and plagioclase and the definition (visu) crystal size ranges from 2 to 4mm. Petrologist's This sample is a diorite (monzodiorite). A coarse-grained igneous rock consisting of definition quartz, feldspar and plagioclase with accessory mica, pyroxene, amphibole and olivine. Crystal size lies between 2 and 4 mm and the most important kind of porosity is intercrysalline fissures. The presence of the orthoclase feldspar distinguishes this rock from a diorite and is termed as a monzodiorite. Commercial In the Natural Stone Industry, this rock is known as Verde Labrador definition (if any) GEOMECHANICAL CLASSIFICATION (Behavioural classification, Goodman, 1989) II. Clastic texture A. Stably cemented. DESCRIPTION OF LOCAL SAMPLE Geological Not available description of local sample Other information Not available about the outcrop Weathering grade of Not available sampling outcrop (ISRM, 1981) Location Not available ENGINEERING CLASSIFICATION OF INTACT ROCKS (General classification) ISRM classification R0 R1 R2 R3 R4 R5 R6 by strength. USC Extremely Very Weak Medium Strong Very Extremely (MPa) (ISRM, 1981) weak weak (5-25) strong (50-100) strong strong (0.25-1) (1-5) (25-50) (100- (>250) 250) Deere and Miller classification by strength and deformation properties (Deere and Miller, 1966) Mechanical General values Particular (local) properties (unaltered) values (if any) Young’s Modulus (E) Tangent modulus 30-70 (Ramírez 39.80 (Brotons et al, at 50% ultimate strength (GPa) Oyanguren & Alejano 2016) 2004) Poisson’s coefficient (ν) 0,12-0,25 (Ramírez Oyanguren & Alejano 2004) Uniaxial compression strength (MPa) 100-250 (Hoek 2007, 59.86 (Brotons et al, p) 2016) 120-280 (Oyanguren & Alejano 2004) P wave velocity (m/s) 5500-6000 4656 (Brotons et al, (Fourmaintraux, 1976 2016) in Goodman (1989) mi (Hoek and Brown criterion, 1980) 25 ± 5(Hoek, 2006) Basic friction angle (Φb) 50-55 (González de Vallejo et al., 2002) Physical properties Dry unit weight (kN/m3) 27-29 (Schön 2015 25.839 (Brotons et al, (unaltered) p116) 2016) 25-27.5 (Ramirez Oyanguren & Alejano 2004) Porosity (%) 0,1-2 (Oyanguren & 0,916 (Brotons et al, Alejano 2004) 2016) Engineering uses and It is an excellent building material. others Refences: • Brotons, V., Tomás, R., Ivorra, S. Grediaga, A. Martínez-Martínez, J., Benavente, D., Gómez-Heras, M. (2016): Improved correlation between the static and dynamic elastic modulus of different types of rocks. Mater Struct (2016) 49: 3021. https://doi.org/10.1617/s11527-015-0702-7 • Ramírez Oyanguren, P., & Alejano Monge, L. R. (2004). Mecánica de rocas: Fundamentos e ingeniería de taludes (No. 727). Red DESIR. • Schön JH (2015) Physical Properties of Rocks: Fundamentals and Principles of Petrophysics (2nd edition). Dev Pet Sci. doi: 10.1103/PhysRevE.67.016120 • Fourmaintraux, D., 1976. Characterization of rocks; laboratory tests, ChapterIV in La Mécanique des roches appliquée aux ouvrages du génie civil by Marc panet et al. École Nationale des Pnts et Chausées, Paris • Hoek, 2006. Practical rock engineering. Available in https://www.rocscience.com/learning/hoeks-corner • González de Vallejo, L.I., Ferrer, M., Ortuño, L., Oteo, C., 2002. Ingeniería Geológica. Prentice Hall. Madrid • Goodman, R.E., 1989. Introduction to Rock Mechanics, 2nd edition. John Wiley and Sons. New York • ISRM (1981) Rock characterization. In: Brown ET (ed) Testing and monitoring— ISRM suggested methods. Pergamon press, Oxford, p 211 Last update: 13/02/2019 .