zircon

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: 
485 millions years

Russia, Komi Republic, Subpolar Ural, upper reaches of the Little Lemva river. Gray-green siltstones. Consist: quartz, feldspar, sericite, chlorite. Accesory: hematite, magnetite, leicocsen, zircon, epidote. Fossil: Aristocystites (?) sp., Fascicrinus cf. foliacens Mil sp. nov., Pentagonocyclicus cf. concentricus Yelt., Veryhachium trisulcum Downie Baltisphaeridium longispinosum Ets. Pogureyskaya series. Cambrian (Furongian) - Lower Ordovican (Tremadocian).

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: 
485 millions years

Russia, Khanty-Mansiysk autonomous okrug, Subpolar Ural, Petravozh creek. Gray-green siltstones, sandstones with dykes gabbro. Sedimentary rocks consist: quartz, feldspar, sericite, chlorite. Accesory: hematite, magnetite, leicocsen, zircon, epidote. Fossil: Aristocystites (?) sp., Fascicrinus cf. foliacens Mil sp. nov., Pentagonocyclicus cf. concentricus Yelt., Veryhachium trisulcum Downie Baltisphaeridium longispinosum Ets. Pogureyskaya series. Cambrian (Furongian) - Lower Ordovican (Tremadocian). Dykes gabbro: Upper Ordovican - Lower Silurian.

Rock type: 
Age: 
485 millions years

Russia, Komi Republic, Subpolar Ural, upper reaches of the Little Lemva river. Gray-green siltstones. Consist: quartz, feldspar, sericite, chlorite. Accesory: hematite, magnetite, leicocsen, zircon, epidote. Fossil: Aristocystites (?) sp., Fascicrinus cf. foliacens Mil sp. nov., Pentagonocyclicus cf. concentricus Yelt., Veryhachium trisulcum Downie Baltisphaeridium longispinosum Ets. Pogureyskaya series. Cambrian (Furongian) - Lower Ordovican (Tremadocian).

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: 
230 millions years

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.

Rock type: 
Age: 
230 millions years

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.