plagioclase

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.

Russia, Amur region, Kolbachi Creek Valley. Contact granodiorites (light) and lamproite dike (dark). Porphyry biotite-hornblende granodiorites. Granodiorites form a large Haiktinsky massif. A characteristic feature of granodiorites is the greenish color of plagioclase and the rocks themselves, due to the processes of chlorination, epidotization and carbonatization, accompanied by co-securitization and seritization of plagioclase. Pozdnestanovoy complex. Paleoproterozoic. Lamproite dike - the third phase of the Amujikan complex. Upper Jurassic.

Russia, Amur region, Haikta river valley. Porphyry biotite-hornblende granodiorites. Granodiorites form a large Haiktinsky massif. A characteristic feature of granodiorites is the greenish color of plagioclase and the rocks themselves, due to the processes of chlorination, epidotization and carbonatization, accompanied by co-securitization and seritization of plagioclase. Pozdnestanovoy complex. Paleoproterozoic.

Russia, Karachay-Cherkess Republic, Honey waterfalls. Pink biotite granites. Consist: plagioclase, microcline, quartz, biotite, muscovite. Malinskiy granite complex. Carboniferous.

Russia, Amur region, Haikta river valley, Berezite gold mine. Porphyry biotite-hornblende granodiorites. Granodiorites form a large Haiktinsky massif. A characteristic feature of granodiorites is the greenish color of plagioclase and the rocks themselves, due to the processes of chlorination, epidotization and carbonatization, accompanied by co-securitization and seritization of plagioclase. Pozdnestanovoy complex. Paleoproterozoic.

Russia, Caucasus, Kabardino-Balkarian Republic, Harbas river valley. Pink biotite granites. Massif. Consist: plagioclase, microcline, quartz, biotite, muscovite. Malinskiy granite complex. Carboniferous.

Russia, Khabarovsk Territory. Quartz diorite porphyry. Upper Cretaceous. Consist: quartz 10-15%, plagioclase 60-65%, hornblende 15-25%, biotite up to 5%. Plagioclase - andesine or labrador-andesine. Accessory: magnetite, apatite, sphene.

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, Karachay-Cherkess Republic, Honey waterfalls. Layered dolomitic limestones with siliceous nodules containing horizon. In limestones, a large number of bryozoans, brachiopods and pelecipods. Jurassic. Tithonian.

At the bottom of the cliff - granites. Pink biotite granites. Consist: plagioclase, microcline, quartz, biotite, muscovite. Malinskiy granite complex. Carboniferous.

Russia, Khabarovsk Territory. Stock diorite porphyrites. Butakano-Churkinsky complex. Greenish-gray and dark gray with a greenish tint porphyry rocks with a different number of plagioclase phenocrysts in the microcrystalline bulk consisting of a plagioclase sheet, chlorinated biotite flakes and hornblende. Plagioclase phenocrysts are represented by zonal andesine tablets, sometimes albitized along cracks. The hornblende, also present in phenocrysts, is represented by idiomorphic grains 1 × 4 mm in size.