oligoclase

Россия, Приморский край, юго-западное окончание бухты "Трехозерка". Гранитный массив горы Черный Куст. В строении массива принимают участие биотитовые средне-крупнозернистые граниты, редко порфировидные граниты, гранит-порфиры, гранатсодержащие граниты, роговообманково-биотитовые и мусковитовые лейкократовые и аляскитовые граниты, гранодиориты, кварцевые диориты и диориты.

Russia, Khabarovsk Territory. Dyke alaskite granite. Paleocene. Consist: quartz 30-38%, K-spar 40-55%, plagioclase 15-25%, biotite up to 3%. Plagioclase - oligoclase, rare - oligoclase-albite, albite. Accessory: magnetite, zircon, apatite, monazite. Silicate analysis: SiO₂ 74-77%, TiO₂ 0.1-0.2%, Al₂O₃ 13-14%, Fe₂O₃ 0.3-0.5%, FeO 0.7-1.6%, MnO 0.01-0.04%, MgO 0.1-0.3%, CaO 0.2-0.5%, Na₂O 2.7-3.4%, K₂O 4%, SO₃ 0%, P₂O₅ 0-0.03%, CO₃ 0-0.4%.

Russia, Khabarovsk Territory, Yagdynya river. Biotite Granites. Form an massif of 850 square kilometers. Consist: oligolclase - 24-32%, microcline - 24-45%, quartz - 15-29%, biotite - 4-11%. Plagioclase forms sericite and albite (auto-metasomatism). Chlorite is formed by biotite. Accessory: sphene, zircon, apatite. Definitions of absolute age (K): 207, 230, 235 million years. Upper Triassic.

Russia, Khabarovsk Territory, Yagdynya river. Biotite Granites. Form an massif of 850 square kilometers. Consist: oligolclase - 24-32%, microcline - 24-45%, quartz - 15-29%, biotite - 4-11%. Plagioclase forms sericite and albite (auto-metasomatism). Chlorite is formed by biotite. Accessory: sphene, zircon, apatite. Definitions of absolute age (K): 207, 230, 235 million years. Upper Triassic.

Russia, Khabarovsk Territory, Yagdynya river. Biotite Granites. Form an massif of 850 square kilometers. Consist: oligolclase - 24-32%, microcline - 24-45%, quartz - 15-29%, biotite - 4-11%. Plagioclase forms sericite and albite (auto-metasomatism). Chlorite is formed by biotite. Accessory: sphene, zircon, apatite. Definitions of absolute age (K): 207, 230, 235 million years. Upper Triassic.

Russia, Khabarovsk Territory, Yagdynya river. Biotite Granites. Form an massif of 850 square kilometers. Consist: oligolclase - 24-32%, microcline - 24-45%, quartz - 15-29%, biotite - 4-11%. Plagioclase forms sericite and albite (auto-metasomatism). Chlorite is formed by biotite. Accessory: sphene, zircon, apatite. Definitions of absolute age (K): 207, 230, 235 million years. Upper Triassic.

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.

Sardinia, Spiaggia della Torre. Micaschists and paragneisses with garnet-oligoclase paragenesis. Paleozoic? Micaschists and paragneisses with garnet-oligoclase paragenesis. With quartz veins and lenses. Paleozoic?