biotite

Russia, Primorsky Territory, Mount Falaza. Granodiorite massif. The massif has the shape of an oval elongated in a sub-latitudinal direction. Area 80 km square. Contacts with host rocks - 60-90 degrees. Granodiorites biotite-hornblende, gray, dark gray, medium-grained, fine-grained. Consist: plagioclase 50-60%, quartz 10-15%, orthoclase up to 10%, biotite 10-12%, hornblende 5-15%. Accessory: apatite, zircon, rarely orthite. Upper Cretaceous.

Portugal, Sintra, Castelo dos Mouros. The Sintra Massif or batholith is a circular intrusion. Biotite Granites. Upper Cretaceous.

Portugal, Sintra, Parque e Palácio Nacional da Pena. The Sintra Massif or batholith is a circular intrusion. Biotite Granites. Upper Cretaceous.

Portugal, Sintra, Castelo dos Mouros. The Sintra Massif or batholith is a circular intrusion. Biotite Granites. Upper Cretaceous.

Russia, Khabarovsk Territory, Tordoki-Yani Mountain. Biotite granites containing cordierite. Medium grained, coarse grained. Form batholith. Consist: oligoclase or andesine - 25-60%, K-spar - 10-45%, quartz - 18-32%, biotite - 8-25%. Accesory: apatite, zircon, sphen, monazite, garnet, tourmaline, ortit. Characterized by the presence of cordierite. Low Cretaceous.

Russia, Khabarovsk territory, Sikhote-Alin range, Tordoki-Yani mountain. Biotite granites containing cordierite. Medium grained, coarse grained. Form batholith. Consist: oligoclase or andesine - 25-60%, K-spar - 10-45%, quartz - 18-32%, biotite - 8-25%. Accesory: apatite, zircon, sphen, monazite, garnet, tourmaline, ortit. Characterized by the presence of cordierite. Low Cretaceous.

Gray dacites. Forms an extensive cover. Phenocrysts: oligoclase, orthoclase, sanidin, quartz, biotite. Phenocrystal sizes: 0.1 - 2 mm, rarely 3-4 mm. Upper Cretaceous - Low Paleocen. Thickness: 500-600 metres.

Migmatized quartz-biotite schists. Srednegudzhal'skaya series. Thickness - 1200-1400 metres. Absolute definition of age - no. Fossil - no. Pr₁gd_2.

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.

Medium fine-grained biotite-pyroxene gabbro-diorite. Pluton. Sikhote-Alin series of Eocene subintrusions. Eocene. Massive texture. Consist: plagioclase 60-65%, clinopyroxene - 15–20%, hornblende - 1-5%, biotite - 10-15%. Accessory: apatite. νδ₽₂