K-spar

Rock type: 
Age: 
86 millions years

Россия, Хабаровский край, водораздел реки Подохоренок и Вторая Седьмая. Гранитный массив. Биотитовые двуслюдяные граниты - серые крупнозернистые и среднезернистые породы с гипидиоморфной структурой. Основными породообразующими минералами являются калиевый шпат (30-50%), плагиоклаз (10-35%), темноцветные минералы (5-10%) и кварц (20-35%). Акцессорные минералы представлены апатитом, цирконом и рудными минералами. Вторичные минералы - мусковит, хлорит и серицит. Спектральный анализ гранитов выявил следующие примесные элементы; Mn, Ni, Ti, V, Cr, Cu, Pb, реже Mo, Sn и Zr.

Rock type: 
Age: 
94 millions years

Russia, Khabarovsk Territory, river valley Ko. Grandiorite massif. Bachelazskiy complex. Granodiorites are medium-grained, gray. Consist: plagioclase - 37-54%, K-spar - 8-27%, quartz - 18-30%, biotite - 8-13%, hornblende - 4-12%. Accessory minerals: magnetite, apatite, ortit, zircon, monazite. Massive texture. Hypidiomorphic grain structure. Upper Cretaceous. Definitions of absolute age: 86-103 million years.

Rock type: 
Age: 
635 millions years

Russia, Komi Republic, Subpolar Ural, Big Lemva river. Pink-gray, fine-grained, subalkaline biotite granites. Lemvinsky granite massif. Consist: quartz - 29%, plagioclase - 23%, K-spar - 47%, biotite - 1%. Accesory: zircon, magnetite, sphen, apatite, ortit, ilmenite. Neoproterozoic.

Rock type: 
Age: 
635 millions years

Russia, Komi Republic, Subpolar Ural, Big Lemva river. Pink-gray, fine-grained, subalkaline biotite granites. Lemvinsky granite massif. Consist: quartz - 29%, plagioclase - 23%, K-spar - 47%, biotite - 1%. Accesory: zircon, magnetite, sphen, apatite, ortit, ilmenite. Neoproterozoic.

Rock type: 
Age: 
1200 millions years

Russia, Republic of Buryatia, Taksimo. Brownish-lilac and greenish large-pebble conglomerates with interbeds of sandstones. Pebbles and boulders in conglomerates up to 80 centimeters in size. Formed by sandstones, shales, granites and various effusive rocks. Sandy cement is metamorphosed to a saussurite-sericite aggregate, with feldspars, quartz, epidote and iron hydroxides. The interlayers of sandstones are green, greenish-gray, polymictic and quartz. Polymictic sandstones are formed by quartz, plagioclase and potassium feldspar. Mukhtunnaya series. Thickness 1300 meters.

Rock type: 
Age: 
57 millions years

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%.

Rock type: 
Age: 
87 millions years

Russia, Khabarovsk territory, Khekhtsir range. Korfovsky massif granodiorite porphyry. Gray, medium and coarse-grained rocks. Consist: plagioclase, K-spar, amphibole, pyroxene, biotite. Upper Cretaceous.

Rock type: 
Age: 
87 millions years

Russia, Khabarovsk territory, Khekhtsir range. Korfovsky massif granodiorite porphyry. Gray, medium and coarse-grained rocks. Consist: plagioclase, K-spar, amphibole, pyroxene, biotite. Upper Cretaceous.

Rock type: 
Age: 
122 millions years

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.

Rock type: 
Age: 
122 millions years

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.