 | | Report (issue) | | percent of rock and are composed of tabular plagioclase laths, stout prismatic clinopyroxene, and acicular...oxides. Holocrystalline groundmass of pilotaxitic plagioclase laths, intergranular pyroxene, and magnetite...feldspar filling interstices or as overgrowths on plagioclase laths. only in the southeast part of the quadrangle...(see Axelrod, 1956; Gilbert and Reynolds, 1973; Golia and Stewart, 1984) Tcv Coal Valley Formation of...(see Axelrod, 1956; Gilbert and Reynolds, 1973; Golia and Stewart, 1984). K-Ar age of 9.4 to 10.7 Ma (Gilbert |  | Koval', P. V., Ariunbileg, S., Libatorov, Yu. I., Maksimyuk, I. Ye. (1988) THE BAYANULA MOLYBDENUM-COPPER PORPHYRY PROSPECT, CENTRAL MONGOLIA, AND ITS RELATION TO MAGMATISM. International Geology Review, 30 (8) 900-911 doi:10.1080/00206818809466070 | Journal (article/letter/editorial) | | prospect, the first of its type in Central Mon golia, is a classic porphyry deposit, associated with...dike bodies; porphyritic pyroxenehornblende-plagioclase trachyandesites and trachyandesite-basalts predominate...chloritized biotite. The groundmass is com posed of plagioclase microlites, decomposed glass, biotite, amphibole...feldspar appears (often sanidine), while the plagioclase becomes more sodic. The phenocryst 902 903...the first field observations), which is due to plagioclase decomposing with the formation of phases difficult |  | Chernyshev, I. V., Prokof’ev, V. Yu., Bortnikov, N. S., Chugaev, A. V., Goltsman, Yu. V., Lebedev, V. A., Larionova, Yu. O., Zorina, L. D. (2014) Age of granodiorite porphyry and beresite from the Darasun gold field, eastern Transbaikal region, Russia. Geology of Ore Deposits, 56 (1) 1-14 doi:10.1134/s1075701514010036 | Journal (article/letter/editorial) | | granodiorite porphyry, monomineralic fractions of plagioclase, Kfeldspar, and biotite, as well as sericite...gabbro; small bodies of serpentinized pyroxenite, plagioclasebearing dunite and peridotite; troctolite, and...Okhotsk Chita 45° s Lena Irkutsk M on u golia Khabarovsk Vladivostok China (b) 1 14 3 2...abundant rocks in the Darasun stock, contain plagioclase (15–30%), Kfeldspar (5–10%), quartz (5–15%)...increase in quartz and Kfeldspar contents. Plagioclase phenocrysts correspond to oligoclase (An15–28) |  | | Journal (article/letter/editorial) | | Pedreira and Silva, 1996; Baltazar and Pedreira, 1996; Golia, 1997; Baltazar and Pedreira, 1998; Zucchetti and...delicate primary features, like fan texture and plagioclase with hollow cores in metabasalts (Zucchetti et...with greenschist facies retrograde metamorphism (Golia, 1997). The amphibolite facies minerals lie on the...dacites have a porphyritic texture, with euhedral plagioclase and less hornblende phenocrysts in a matrix of...of recrystallized quartz and plagioclase, and oriented sericite and chlorite (Zucchetti et al., 2000a) |  | | Report (issue) | | number 6), 7-cm-thick andesitic crystal tuff (plagioclase, clinopyroxene, and hornblende), near base of...Miocene sedimentary rocks in the Coal Valley area (Golia and Stewart, 1984), 120 km south of the Trinity...Bureau of Mines and Geology, Bulletin 91, 163 p. Golia, R.T., and Stewart, J.H., 1984, Depositional environments...brown andesite with 20 percent phenocrysts of plagioclase and biotite and (2) 30 percent pink dacite? with...with 20 percent phenocrysts of plagioclase and biotite. Most clasts are 1 to 10 cm in diameter, some |  | Donskaya, T. V., Gladkochub, D. P., Mazukabzov, A. M., Sklyarov, E. V., Lepekhina, E. N., Wang, Tao, Zeng, Lingsen, Guo, Lei (2014) Continuity of Late Paleozoic-Early Mesozoic magmatism in the Western Transbaikal region. Doklady Earth Sciences, 458 (1) 1067-1072 doi:10.1134/s1028334x14090268 | Journal (article/letter/editorial) | | composed (%) of K feldspar (40), quartz (30), plagioclase (28), biotite (1), ore mineral (1), and accessory...0.11; sum, 99.90. Monzonite consists (%) of plagioclase (38), K feldspar (35), hornblende (10), biotite...mian–Middle Triassic magmatism in the North Mon golia and Transbaikal segments of the Central Asian fold |  | Khromykh, S. V., Sokolova, E. N., Smirnov, S. Z., Travin, A. V., Annikova, I. Yu. (2014) Geochemistry and age of rare-metal dyke belts in eastern Kazakhstan. Doklady Earth Sciences, 459 (2) 1587-1591 doi:10.1134/s1028334x14120174 | Journal (article/letter/editorial) | | 52° Russia Ust'Kamenogorsk Mon 48° Kazakh stan golia China Irt y 1 2 3 4 78° sh R 84° 90° 96°...presented by potassic feldspar (PFS) and acid plagioclase which frequently occur in glomeroporhpyric aggregates |  | Kolesnik, Yu. N., Stepchenko, S. B., Bukhbinder, G. V., Androsenko, N. P., Tepikin, V. Ye. (1990) THE ORTHOPYROXENE-GARNET GEOBAROMETER FOR PERIDOTITES. International Geology Review, 32 (3) 228-243 doi:10.1080/00206819009465772 | Journal (article/letter/editorial) | | varieties of lherzolite (garnet, spinel, and plagioclase) is the basis for distinguishing peridotite depth...olivine, Cpx = clinopyroxene, Am = amphibole, Pl = plagioclase, Spl = spinel (aluminous), Cr-Spl = chromite...massif, ditto (spec. 160-4-8); III) southwestern Norway, Almklovdalen massif (spec. ESK 66), and others;...Almklov dalen and others on the west coast of Norway) usu ally is solved in the context of tectonic...of an ocean. At least for some of them (western Norway [26]), a Precambrian age of ig neous consolidation |  | | Journal (article/letter/editorial) | | 13—Maihan Uul. Number 6 is a large Bayan Obo REE golia. deposit in Inner Mongolia, China. Inset map shows...in a pluton graben associated with a prominent golia in the South Gobi Desert, ~60 km north of the Mongolian‐Chinese...composed of predominant K-feldspar and also of plagioclase, amphibole, clinopyroxene, nepheline, biotite...fromfrom peralkaline granitic complexes of Mongolia. golia. Normalizing values after [27]. (A) Ore‐bearing |  | | Journal (article/letter/editorial) | | magmatic cycle related to collision of the Tuva–Mon golia microcontinent with continental and islandarc ...rocks is stable (vol %): 23–25 quartz, 30–35 plagioclase, 5–10 Kfeldspar, and 18–20 biotite. Epidote...(30–40 vol %) that fills interstices between plagioclase crystals and of an insignificant amount of darkcol...variable amount of quartz (20–35 vol %). Two plagioclase varieties are distinguished: (1) tabular crystals...itized and albitized plagioclase. The finescaly sericite aggregates replace plagioclase crystals; muscovite |  | ZHU, XIAOQING, ZHANG, QIAN, HE, YULIANG, ZHU, CHAOHUI, HUANG, YAN (2006) Hydrothermal source rocks of the Meng'entaolegai Ag-Pb-Zn deposit in the granite batholith, Inner Mongolia, China: Constrained by isotopic geochemistry. GEOCHEMICAL JOURNAL, 40 (3) 265-275 doi:10.2343/geochemj.40.265 | Journal (article/letter/editorial) | | diorite vein that the rock consists of hornblende, plagioclase, with a little pyroxene and quartz. The E-W trending...0.2–0.3mm grain, followed by hand-picking of plagioclase under the microscope. The three Yanshanian biotite...way and orthoclase was separated. Two remnant plagioclase samples were selected from E-Wtrending diorite...radioactive elements. 206Pb/204Pb ratios in 6 plagioclase samples are within the range of 18.460–18.605...M-10 M-40 Biotite-plagioclase granite Biotite-plagioclase granite Biotite-plagioclase granite Muscovite-plagioclase |  | | Journal (article/letter/editorial) | | these formations is 135-152 Ma [ 2 ] . In Mon golia, these rocks form a zone mainly confined to the...pheno crysts of olivine (about 11%), basic plagioclase (4-6%), and clinopyroxene (4-5%), and a groundmass...volcanics and associated hypabyssal intrusions of Mon golia: Trudy sovmestn. Sov.-Mongol. geol. eksped., Issue |  | | Journal (article/letter/editorial) | | Monplexes have been investigated by normal geologi- golia) , a detailed description of which has been given...lithophile elements; 5 — gabbros and segregations of plagioclase; 6 — pyroxenites and pyroxene cumulates; 7 —...which deposition of the lighter, essentially plagioclase fraction took place in the upper 892 part of |  | | Journal (article/letter/editorial) | | in structures of this sort in the eastern Mon golia–Okhotsk Orogenic Belt. The Malomyr gold deposit...carbonate Corg Rockforming mineral Feldspar (plagioclase, K–Na feldspar) Quartz Mica Hydromica (sericite...from results of sampling. The 40Ar/39Ar age of plagioclase monomineralic fraction from the feldspar–carbonate–quartz |  | | Report (issue) | | tuff contains about 14 percent phenocrysts (plagioclase, sanidine, quartz, and biotite) and sparse...tuff composed of about 10 percent phenocrysts (plagioclase, sanidine, and quartz) and 15 percent rounded...the unit contains 7 to 22 percent phenocrysts (plagioclase, sanidine, and a trace of biotite and hornblende)...the Wassuic Group (Gilbert and Reynolds, 1973; Golia and Stewart, 1984) in Mineral County, Nevada, 110...Society of America Bulletin, v. 84, p. 2489-2510 Golia, R.T., and Stewart, J.H., 1984, Depositional environments |  | | Journal (article/letter/editorial) | | hornblende, hypersthene with or without diopside, plagioclase, potash feldspar, and quartz. Such rocks usually...1992): (1) hypersthene (hy) + diopside (di) + plagioclase (pl) ± hornblende (hb) +quartz (qtz); (2) hy...acidic granulites with a mineral paragenesis of plagioclase + quartz + hypersthene + clinopyroxene. The content... which is indi cated by the replacement of plagioclase by microcline. The Hengshan complex experi enced...mainly amphiboles replacing pyrox enes and plagioclase replacing garnets. The retrograded eclogites |  | | Journal (article/letter/editorial) | | 1956; Gilbert and Reynolds, 1973; Stewart, 1983; Golia and Stewart, 1984). The Wassuk Group approximately...have similar ages and depositional environments (Golia Downloaded by [Library Services City University...alaskite. Numerous black or green hornblende- and plagioclase-bearing dikes and sills cut the Wyman Formation...(1951), these are composed principally of altered plagioclase and hornblende, and were classified by him as...of the Mineral Ridge pluton. Hornblende- and plagioclase-bearing dikes (24 ± 1.6 Ma; Fig. 4) and undeformed |  | | Journal (article/letter/editorial) | | known distribution ratios of lithium between plagioclase and glass in dacites (Nagasawa and Schnetzler...content in potassium feldspar and mica and vs the plagioclase number (Dupuy, 1968; Philpotts and Schnetzler...rubidium between plagioclase and glass decreases with the content of anorthite minal in plagioclase, but the...Transbaykal (Antipin et a l . , 1969) and Mon golia (Antipin, 1975) we showed that the rubi dium content |  | | Journal (article/letter/editorial) | | Tsav, Urgen, Tushleg, and GurvanDzangal in Mon golia (Petrova et al., 1987; Zhamoitsina and Semushin...association with smectite mainly as pseudomorph after plagioclase in altered trachydacite. All other minerals commonly...plane light; (b) trachydacitic ignimbrite with plagioclase fragments (1) replaced by smectite and kaolinite...(e) argillized trachydacitic ignimbrite with plagioclase replaced by smectite (1), plane light; (f) lavsan...fissiontracks in matrix and their absence in smectitized plagioclase phenocrysts (flux of thermal neutron is ~1015) |  | | Report (chapter) | | complicated tectonic imbrication of amphibo- amphibole-plagioclase-rutile), epidote-rich lites, amphibole gneisses...enclosed in reworked eclogites (clinopyroxene-plagioclase-garnetamphibolite-facies rocks are diagnostic...extending from Plan~i stantial proportion of plagioclase, to felsic, in the SE to lQtvina in the NE, metagabbro...variable mineral composition (clinopyroxene-plagioclase-ilmenite detail by Crowley et aL (2002). -ap...(clinopyroxeneThe Maridnsk6 L~izn~ crystalline complex plagioclase-amphibole-ilmenit e-apatite) and consists of |  | | Journal (article/letter/editorial) | | composed dominantly of quartz, topaz, and sodic plagioclase,is mineralogically similar to ongonites described...predominantly of quartz, topaz, and albitic plagioclase,with variable mica (referred to as ongonite)...BURT: ONGONITE AND TOPAZITE DIKES of unaltered plagioclase,either as phenocrystsin the finegrained, qua...only quartz, topaz, and variable white mica; plagioclase is noticeably absent. In a transition zone exposed...between upper plagioclase-barrenand lower plagioclase-bearingdike rock, relict plagioclase grains are now |  | Liu, Jianchao, Wang, Chen, Liu, Yang, Zhang, Haidong, Ge, Jiakun (2019) Middle Permian Wuhaolai mafic complex in the northern North China Craton: Constraints on the subduction-related metasomatic mantle and tectonic implication. Geological Journal, 54 (4) 1834-1852 doi:10.1002/gj.3085 | Journal (article/letter/editorial) | | biotite; Cpx = clinopyroxene; Hb = hornblende; Pl = plagioclase [Colour figure can be viewed at wileyonlinelibrary...2–1 mm in length 11.63 SC‐6 (5 vol.%). The plagioclase is anhedral tabular without zonal texture 26...clinopyroxene (80 vol.%), hornblende (10 vol.%), and plagioclase 29.09 transitional. The pyroxenite with cumulate...minerals are 26.78 grained, mainly consisting of plagioclase (60 vol.%; coarse‐medium grained texture with...33.86 clinopyroxene, 30 vol.% of subhedral plagioclase (with obvious 34.30 grained texture. It contains |  | Chugaev, A. V., Chernyshev, I. V., Bortnikov, N. S., Kovalenker, V. A., Kiseleva, G. D., Prokof’ev, V. Yu. (2013) Lead isotope ore provinces of eastern Transbaikalia and their relationships to regional structures: Results of high-precision MC-ICP-MS study of Pb isotopes. Geology of Ore Deposits, 55 (4) 245-255 doi:10.1134/s107570151304003x | Journal (article/letter/editorial) | | data points of Pb iso topic composition of plagioclase from gabbroic rocks plotted in the 206Pb/204Pb...deposits. Crosses are Pb isotopic compositions of plagioclase from Paleozoic gabbroic rocks in the Darasun...poyasa (Geochemistry of granitoids in the Mon golia–Okhotsk Belt), Moscow: Nauka, 1980, pp. 5–13. Yarmolyuk |  | Sorokin, A. A., Kotov, A. B., Ponomarchuk, V. A., Sorokin, A. P., Kovach, V. P., Savatenkov, V. M. (2013) Aptian bimodal volcanic associations and granitoids in the northern margin of the Amur microcontinent: Age, sources of material, and geodynamic environments. Petrology, 21 (1) 66-84 doi:10.1134/s0869591113010050 | Journal (article/letter/editorial) | | comprise clinopyroxene, plagioclase–two pyroxene, and olivine varieties. The plagioclase– pyroxene varieties...contain 7–10% phenocrysts, which are predominantly plagioclase (andesine), clinopyrox ene (diopside), and biotite...medium porphyritic rocks with phenocrysts of plagioclase (oli goclase–andesine), quartz, biotite, and...of completely recrystallized glass with rare plagioclase laths and small quartz grains. Age estimates...granodiorites of the Talalinskii Massif consist of plagioclase (oligoclase, 55–60%), quartz (20%), K–Na feldspar |  | Cheng, Yinhang, Duan, Lianfeng, Wang, Shaoyi, Li, Ying, Teng, Xuejian, Zhang, Tianfu (2020) Termination of the Hegenshan Orogen in the Xing'an–Mongolian Orogenic Belt, North China: Geochemical and zircon U–Pb geochronological constraints from Early Permian mafic dykes. Geological Journal, 55 (1) 845-861 doi:10.1002/gj.3463 | Journal (article/letter/editorial) | | et al., 2014) argue that mafic–ultramafic com- golia. The Hegenshan Orogen was part of the XMOB from...crystallization and directive structure of the plagioclase, indicating the magma flow direction, which is...to NW. (e) Pyroxene filling the voids in the plagioclase microcrystal in the middle of the dyke. (f) Pyroxene...Pyroxene and magnetite filling the voids in the plagioclase microcrystal; components of multiple amygdules...experienced tectonic deformation. Py: pyroxene; Pl: plagioclase; Chl: chlorite; Cal: calcite; Qrz: quartz [Colour |
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