 | | Journal (article/letter/editorial) | | A/. D. A fonso Henriques, 41-4: D. 1000 Lisboa, Portugal Z. C. G. Silva Depto de Geologia, Fac. de Ci&ncias...CODEX, Portugal, Centro de Geologia do IICT, A/. D. Afonso Henriques, 41-40: D. 1000 Lisboa, Portugal Yves...are green hornblende, more commonly, followed by biotite containing hematite impregnations. Apatite is observed...beds with SW-NE strike and 25"SE maximum dip (Monforte 1960). Dykes or sills of basic and granitoid rocks...comprise basic rocks and granitoids. According to Monforte (1960) and Rodrigues and Pereira (1973), based |  | | Journal (article/letter/editorial) | | with analysed phengite crystals from the Costa Monforte phengite marble. Dashed lines in (b) contour three...samples are from a phengite-rich layer of the Costa Monforte marble, which crops out about 1.5 km NNE of the...Fig. 3 in Compagnoni & Rolfo, 2003). The Costa Monforte phengite marble is characterized by a weak foliation... Si content (apfu) of phengite from the Costa Monforte phengite marble. The inset shows key to symbols...order to obtain complete information on the Costa Monforte phengite, TEM-AEM investigations were performed |  | | Journal (article/letter/editorial) | | location of the studied samples from the Costa Monforte marble lens. The inset shows location of the BIU...800 m long and 70 m thick, is exposed at Costa Monforte (NNE of the Brossasco Village, Fig. 1). It is...Rolfo, 2003; Compagnoni et al., 2004). The Costa Monforte marble lens consists of both calcite- and dolomite-rich...clinopyroxene, epidote, Ca-amphibole, chlorite, biotite and accessory K-feldspar, titanite, rutile and...silicate-rich domains commonly found at the Costa Monforte marble quarry (Compagnoni et al., 2004), where |  | | Journal (article/letter/editorial) | | Universidade de Évora, Apt. 94, 7002-554 Evora, Portugal Unidad de Geocronología (CAI de Ciencias de la...microphotograph showing zoned plagioclase, amphibole, biotite and quartz. 3. Results In this study, a set of...of quartz, albite, K-feldspar, amphibole, and biotite, sometimes reaching 3 mm in diameter and forming...sericite and opaque minerals, whereas amphibole and biotite phenocrysts are partially replaced by chlorite...texture, and plagioclase, amphibole, quartz and biotite are identified; it is classified as a quartz dioritic |  | de Oliveira, D. P. S., Robb, L. J., Inverno, C. M. C., Charlesworth, E. G. (2007) Metallogenesis of the São Martinho and Mosteiros Gold Deposits, Tomar Cordoba Shear Zone, Portugal. International Geology Review, 49 (10) 907-930 doi:10.2747/0020-6814.49.10.907 | Journal (article/letter/editorial) | | Mosteiros Gold Deposits, Tomar Cordoba Shear Zone, Portugal a a b D. P. S. de Oliveira , L. J. Robb , C...Mosteiros Gold Deposits, Tomar Cordoba Shear Zone, Portugal, International Geology Review, 49:10, 907-930...Mosteiros Gold Deposits, Tomar Cordoba Shear Zone, Portugal D. P. S. DE OLIVEIRA,1 L. J. ROBB, Economic Geology...Mineiro, Apartado 7586, 2721-866 Alfragide (Lisbon), Portugal and CREMINER, Faculdade Ciências, Univ. Lisboa...Lisboa, Edifício C6, Campo Grande, 1749-016 Lisboa, Portugal AND E. G. CHARLESWORTH School of Geosciences |  | Ferrando, Simona, Groppo, Chiara, Frezzotti, Maria Luce, Castelli, Daniele, Proyer, Alexander (2017) Dissolving dolomite in a stable UHP mineral assemblage: Evidence from Cal-Dol marbles of the Dora-Maira Massif (Italian Western Alps) American Mineralogist, 102 (1) 42-60 doi:10.2138/am-2017-5761 | Journal (article/letter/editorial) | | Mg-hornblende, diopside+plagioclase symplectites, biotite, titanite, quartz are recognized in calcite marbles...marble lenses in the BIU, i.e., those of Costa Monforte (Castelli et al. 2007) and Isasca (Fig. 1a), both... Locality Costa Monforte Costa Monforte Costa Monforte Costa Monforte Costa Monforte Isasca Isasca Dol... Chl, Amp Dol, Cc, Amp, Chl Costa Monforte Isasca Costa Monforte (N)CFM(A)S-COH system DM1631 DM1649...ata.html). 1 Costa Monforte Isasca Isasca Isasca Costa Monforte Costa Monforte Phase diagrams computation |  | | Journal (article/letter/editorial) | | of Porto, Rua do Campo Alegre, 4169-007 Porto, Portugal a r t i c l e i n f o Article history: Received...Aguiar and the Águas Frias-Chaves porphyritic biotite granite plutons. Both plutons occur independently...post-orogenic felsic Variscan granites in northern Portugal (NW Iberian Peninsula). The U–Pb zircon analyses...Central Iberian Zone and consequently in Northern Portugal. Based on several ⁎ Corresponding author. Tel...located in the Central Iberian Zone, Northern Portugal, (Farias et al., 1987), was controlled by the |  | DI VINCENZO, GIANFRANCO, TONARINI, SONIA, LOMBARDO, BRUNO, CASTELLI, DANIELE, OTTOLINI, LUISA (2006) Comparison of 40Ar–39Ar and Rb–Sr Data on Phengites from the UHP Brossasco–Isasca Unit (Dora Maira Massif, Italy): Implications for Dating White Mica. Journal of Petrology, 47 (7) 1439-1465 doi:10.1093/petrology/egl018 | Journal (article/letter/editorial) | | Ferraris et al. (2005) and was collected in the Costa Monforte marble lens (Fig. 1), a body of 800 m length...enclosed in metasedimentary schists. The Costa Monforte marble is generally medium grained and is locally...epidotes, feldspars, Ca-amphiboles, chlorite and biotite. Accessory minerals include zircon, titanite and...nano-scale features of white mica from the Costa Monforte marble arose from the following growth sequence:...Published 40Ar–39Ar ages in white mica (WM) and biotite (Bt) from different lithologies of the UHP (BIU) |  | | Journal (article/letter/editorial) | | Navarros (H), Aguilbn (A), Belchite (B), L~cera (L), Monforte de Moyuela (M), and Nogueras (N). Ba = Bb.denas...cubic-meter-sized block in the area of the SSW rim east of Monforte de Moyuela. The breccia is "polygenetic" in the...deformation in this pressure range is biotite. Kinking of biotite starts at about 1 GPa [38]. Whereas biotites...Approximately 70-80% of all biotite grains show kink bands. However, kink bands in biotite are not diagnostic...the m a n u s c r i p t . Fig. 11. Kink bands in biotite from the matrix of the polymict breccia near Nogueras |  | KIENAST, J. R., LOMBARDO, B., BIINO, C., PINARDON, J. L. (1991) Petrology of very-high-pressure eclogitic rocks from the Brossasco-Isasca Complex, Dora-Maira Massif, Italian Western Alps. Journal of Metamorphic Geology, 9 (1) 19-34 doi:10.1111/j.1525-1314.1991.tb00502.x | Journal (article/letter/editorial) | | (1907), in a later study of marble from Costa Monforte, N of Brossasco, and by Michard (1967, pp. 69-74)...seen to derive from banded, coarse-grained garnet-biotite gneiss H I G H - P ECLOGITES, B R O S S A S C...expense of a Ti-rich pre-eclogitic phase, probably biotite or, less likely, brown hornblende. Deformed porphyroblasts...are: (A) Casale Faggeri, (B) Bric Voli, (C) Costa Monforte, (D) Meira Sottana (Isasca), (E) Case Ramello...Brossasco Brossasco Brossasco Brossasco Costa Monforte Isasca Martiniana Martiniana Casale Faggeri Bric |  | | Journal (article/letter/editorial) | | ŽDias and Leterrier, 1994. plutons in northern Portugal and the Puentedeume ŽCourrioux, 1983. and Laza... 1.. The massif is basically a meta-aluminous biotite granodiorite pluton intruded into metamorphic rocks...from east to west the Vilacha´ anticline, the Monforte syncline and the Gundibos anticline. They are...The petrographic study of samples reveals that biotite is the main paramagnetic contributor. Therefore...variation of K m ŽFig. 3. mainly reflects the biotite content, and directional measurements of ASM Žmagnetic |  | | Report (chapter) | | 2015 Global Heritage Stone: Estremoz Marbles, Portugal LUÍS LOPES1,2* & RUBEN MARTINS1 1 University...Évora, Portugal 2 Geophysics Centre of Évora, Rua Romão Ramalho, 59, 7002 554 Évora, Portugal *Corresponding...(Southern Branch of the European Variscides in Portugal). This 40 km NW–SE structure presents outcrop...can be said that, virtually, there is no city in Portugal where Estremoz Marble has not, somehow, been used...indicator of the marble’s importance in the history of Portugal and certifies its value as a Global Heritage Stone |  | | Journal (article/letter/editorial) | | chronological constraints on syn‑ and post‑Variscan biotite porphyroblasts from the Iberian Chains, NE Spain...Abstract We perform a multidisciplinary study of biotite porphyroblasts and veinlet infills hosted in Cambrian...microstructural crosscutting features indicate that a biotite isograd runs parallel to the southeastern transects...Westphalian–to–Guadalupian (285.82 ± 23.75 Ma) for metamorphic biotite porphyroblasts affected by diffusion loss of Ar...and (ii) Early Triassic (246.87 ± 5.36 Ma) for biotite occlusion in post–Variscan veinlets. The Iberian |  | | Report (chapter) | | the margins of the lowand medium-grade garnet-biotite-bearing metapelite fragments indicate partial assimilation...xenolith assimilation processes developed by means of biotite dehydrationmelting reactions (Clemens & Vielzeuf...other nearby outcrops in the Aragonese Branch (Monforte de Moyuela, Vistabella and Codos). The modal composition...to their characteristic mineral assemblages: 9 biotite + quartz + plagioclase + alkali feldspar + garnet...(Alm7o~0) + muscovite _+ ilmenite _+ rutile; 9 biotite + spinel (hercynite) + corundum + muscovite + plagioclase |  | | Book | | sses. 3. Geology-Spain-Congresses. 4. Geology-Portugal-Congresses. I. Dallmeyer, R. D., 1944- . II. Martinez-Garcia...zonation of the Lower Carboniferous of Spain and Portugal. Int Symp Belgian Micropal limits from Emsian...y estratigrafia del Carbonifero de Espana NW y Portugal N. Estud Geol 15 (41-44): 393-420 Wagner RH (1971)...V (1987) El lineamiento tectonico Nazare (W de Portugal)-Luarca (NW de Espana) y su implicacion metalogenetica...zonation of the lower Carboniferous of Spain and Portugal. Int Symp Belgian Micropaleontological limits |  | Puelles, P., Gil Ibarguchi, J.I., García de Madinabeitia, S., Sarrionandia, F., Carracedo-Sánchez, M., Fernández-Armas, S. (2019) Granulite-facies gneisses and meta-igneous xenoliths from the Campo de Calatrava volcanic field (Spain): Implications for the tectonics of the Variscan lower crust. Lithos, 342. 114-134 doi:10.1016/j.lithos.2019.05.031 | Journal (article/letter/editorial) | | (oligoclase-andesine), quartz, sillimanite, garnet, rutile and biotite conform the mineral assemblage in the aluminous...perthitic microcline and the lack of sillimanite and biotite. The presence of significant fabrics in the constituent...plagioclase (19%), quartz (19%), sillimanite (6%), RI biotite (3%), rutile (1%) and minor zircon and opaque minerals...SC with domains richer in garnet, sillimanite, biotite and rutile (Fig. 4a). The clear macroscopic NU...a clear shape-preferred orientation (Fig. 4f). Biotite reaches a grain size of 1 mm and runs parallel |  | | Report (chapter) | | 10 -5 and a few 10 -4 SI, is mainly carried by biotite and possibly amphibole (paramagnetic minerals)...pole of the basal plane of the phyllosilicates (biotite, chlorite and iron-bearing muscovite) and the minimum...AMS axes and the preferred orientation axes of biotite and magnetite (Launeau 1990; Arbaret et al. 1995;...sample, it represents the mean orientation of biotite basal planes usually related to the rock fabric...J. L. 1995. Magnetic fabric vs. magnetite and biotite shape fabrics of the magnetite-bearing granite |  | | Journal (volume) | | . . . 389 Accessory Mineralogy of the Ririwai Biotite Granite, Nigeria, and its Albitized and Greisenized...quartz (20 per cent), hornblende (15 per cent). and biotite (5 per cent). The granite is corn posed of 35 per...quartz. 25-30 per cent plagioclase. 10 per cent biotite , and ore minerals J per cent. The granite phenocrysts...by Cahen and Snelling. (1966) on hornblende and biotite respectively from the post-Kavirondian Maragoli...Amphibole-rich rocks containing hornblende and biotite are restricted to the contact zone of the Migori |  | | Book (volume) | | Madrid, Spain José Tomás Oliveira LNEG Amadora, Portugal ISSN 2364-6438 ISSN 2364-6446 (electronic) Regional...by Late Triassic red beds, Telheiro beach, SW Portugal. Photographed with a drone by JC Kullberg This...Energia e Geologia, former Geological Survey of Portugal, where he acted also as head of the departments...concentrated in regional geological mapping in Portugal and Mozambique, with particular interest in stratigraphy...and basin analysis. Professor at universities of Portugal and Angola, author and editor of several geological |  | | Journal (issue) | | and also as clouds of minute dust-like grains. Biotite microlites were found to occur only rarely. T h...they were armoured by diamond. C.M.B.H. 230 MONFORTE (A.) A tectônica lineamentar e a repartiçào espacial |  | | Book | | dark mica ("biotite mafurite", Holmes 1942) and is confined to a few ejected blocks. One biotite mafurite...Series) Holmes considered olivine, biotite (titaniferous phlogopite-biotite) and pyroxene (clinopyroxene)...olivine, between 20 and 30 Kbar = clinopyroxene; M biotite mafurite liquidus; liquidus phase = olivine; U...made on an unusual variant of this composition, biotite mafurite (see above) and may therefore be of restricted...pressures (C, Fig. 3; Edgar, this volume). In biotite mafurite, a slightly more Ca-rich and highly potassic |  | | Report (issue) | | fro1n silljn1a11ite + K-feldsp,u· up to grn·net-biotite. The shear I low precipitation low erosion rates...an1ounts of tounnaline. garnet, 1nuscovite, and biotite, and minor amounts of sillin1anite, cordierite...2000). Ten1peratures of 800- 900 °C rnay result in biotite dehydration melting reactions occun-ing at present...1989. 1990). (2) a massive precollisional 1-type biotite and hornblende dio1ite. granodio1ite, and granite...pluton, the Baltoro plutonic unit, co1nprising biotite 1nonzogranite to gan1et two-nlica leucogranite |  | | Book | | Coexisting with garnet, many minerals such as biotite, clinopyroxene, cordierite, hornblende, chlorite...21 (13):2568–2570 10. Kashyout AB, Aricò AS, Monforte G, Crea F, Antonucci V, Giordano N (1995) Electrochemical...units Microcline– pyrochlore Carbonate– pyrochlore Biotite–columbite– pyrochlore Nb2O5 P2O5 Pcl Clb Mi...Pcl pyrochlore, Clb columbite, Mi microcline, Bi biotite, Crb carbonates, Py + Po pyrite + pyrrhotite Three...Bolshetagninskoe deposit: microcline–pyrochlore (MP), biotite– columbite–pyrochlore (BCP), and carbonate–pyrochlore |  | | Book (volume) | | instances: that of Great Britain, in 1825, between Portugal and Brazil; of France, in 1849-1850, when differences...only in France, but for the nobility of Poland, Portugal and other countries who took their fashions and...During the last years of the reign of King of Portugal and Mary Tudor. Despite the failure of his mission...oxides, &c.; the spots may be due to aggregation of biotite or of quartz, but often differ little in composition...of iron oxides or graphite, with chlorite and biotite. Still closer to the granite a development of crystals |  | | Book (volume) | | them from England, Scotland, Italy, Spain and Portugal. Such a motley throng of competent men had never...and France on the one hand and Great Britain and Portugal on the other, signed at Paris in February 1763...States (New York, 1900). loul£, a town of southern Portugal, in the district of Faro (formerly the province...possessions take some 40% of the import trade, Portugal, Germany, Norway, Sweden and America coming next...import for local consumption is cheap wine from Portugal, bought by the Kaffirs to the extent of over £500 |
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