Granodiorite porphyry

Dyke granodiorite porphyry. Sikhote-Alin series of Eocene subintrusions. Eocene. The dyke has a length of about 800 m. The maximum thickness is 150 m. It has a submeridional strike (Az. 350 degrees). Az pad. 80 degrees. Angle of 70-80 degrees. Wedges out on both flanks splitting into several small bodies. Pledged by a series of faults, traceable after wedging out of the dyke in siltstones. In the upper part, granodiorites are intensively weathered to a completely disintegrated weathering crust. The weathering crust is clayey, loamy sediments at depths of about 8-10 m, passing into arty and sand and then gradually into undisturbed rocks. The weathering crust is developed to a depth of 30-35 m. Next comes the oxidation zone in granodiorite-porphyry, which is developed to a depth of 50 m. This sample is from a depth of 70 meters. Massive texture. Porphyry structure. Consist: phenocrysts 30-35% - plagioclase; the bulk 65-70% - plagioclase 30-35%, K-spar 5-10%, quartz 15-20%, biotite 1-5%. Accessory: apatite, sphene, zircon.