 | | Journal (article/letter/editorial) | | native copper and supergene enrichment in the Vista Alegre district, Paraná basaltic province, southernmost...Grande do Sul , Porto Alegre, Brazil b CPRM – Geological Survey of Brazil , Porto Alegre, Brazil Published...native copper and supergene enrichment in the Vista Alegre district, Paraná basaltic province, southernmost...native copper and supergene enrichment in the Vista Alegre district, Paraná basaltic province, southernmost...Grande do Sul, Porto Alegre, Brazil; b CPRM – Geological Survey of Brazil, Porto Alegre, Brazil (Accepted |  | | Report (volume) | | Formation......_-_-----__________-----.-_____ Vista Alegre Formation....__-___--_-_________.__-__._.__...Formation in the southern part of the quadrangle. VISTA ALEGRE FORMATION Bedded pyroxene-rich tuff extends...Cretaceous age, are here named the Vista Alegre Formation from Cerro Vista Alegre in the southern part of the...exposures are along the road northwest of Cerro Vista Alegre in the southeast corner of the quadrangle, between...of the. road' Vereda Las Cruces west of Cerro Vista Alegre, Several good exposures of andesite lava can |  | | Report (volume) | | Formation______-_______________-_______________-______ Vista Alegre Formation_______________________________________...Cotorra Tuff and mafic volcanic rock lenses in the Vista Alegre Formation. They are also similar in lithology...de Punta area may include parts or all of the Vista Alegre and Tetuan Formations, as it is overlain in...probable westward decrease in the pyroclastic Vista Alegre component prevented further division of the...the eastern half of the area it underlies the Vista Alegre Formation and Cotorra Tuff. BIO CONTRIBUTIONS |  | Crósta, A.P., Reimold, W.U., Vasconcelos, M.A.R., Hauser, N., Oliveira, G.J.G., Maziviero, M.V., Góes, A.M. (2019) Impact cratering: The South American record – Part 1. Geochemistry, 79 (1) 1-61 doi:10.1016/j.chemer.2018.06.001 | Journal (article/letter/editorial) | | access and disseminate it among the geoscientific community. We aim to present a summary of the current knowledge...space exploration, when the planetary science community realized its importance as an essential process...the same discovery in the K-Pg layer exposed in Spain (Smit and Hertogen, 1980). These authors postulated...Ma. An intense debate ensued in the geoscience community and under widespread interest by the public, related...years amongst the South American geoscientific community. Conferences and conference symposia, such as |  | MAGLAMBAYAN, Victor B., ISHIYAMA, Daizo, MIZUTA, Toshio, MATSUBAYA, Osamu, ISHIKAWA, Yohei (2001) Oxygen and Carbon Isotope Study of Calcite and Dolomite in the Disseminated Au-Ag Telluride Bulawan Deposit, Negros Island, Philippines. Resource Geology, 51 (2) 107-116 doi:10.1111/j.1751-3928.2001.tb00085.x | Journal (article/letter/editorial) | | 107–116, 2001 Oxygen and Carbon Isotope Study of Calcite and Dolomite in the Disseminated Au-Ag Telluride... pyrite, chalcopyrite, galena and tennantite. Calcite, quartz and rare dolomite are the principal gangue...fault zones. The δ18O and δ13C compositions of calcite and dolomite in propylite zone and ore-stage dacite...porphyry breccia were determined. The δ18O values of calcite in propylitized andesite range from +12.2 to +14...range from –6.1 to –1.0 ‰. The δ18O values of calcite and dolomite in sericite- and carbonate-altered |  | Baggio, Sérgio Benjamin, Hartmann, Léo Afraneo, Lazarov, Marina, Massonne, Hans-Joachim, Opitz, Joachim, Theye, Thomas, Viefhaus, Tillmann (2018) Origin of native copper in the Paraná volcanic province, Brazil, integrating Cu stable isotopes in a multi-analytical approach. Mineralium Deposita, 53 (3) 417-434 doi:10.1007/s00126-017-0748-2 | Journal (article/letter/editorial) | | Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil 2 Leibniz Universität...titano-magnetite. The existence of copper in the Vista Alegre region, near the town of Frederico Westphalen...native copper with supergene enrichment in the Vista Alegre region based on the H1, H2, and H3 hydrothermal...malachite, and azurite, resembling those in the Vista Alegre district (Pinto et al. 2011b). In Santa Catarina...copper, in spatial association with zeolite and calcite, fills the central part of cavities Fig. 2 Field |  | Pittarello, Lidia, Nestola, Fabrizio, Viti, Cecilia, Crósta, Alvaro Penteado, Koeberl, Christian (2015) Melting and cataclastic features in shatter cones in basalt from the Vista Alegre impact structure, Brazil. Meteoritics & Planetary Science, 50 (7) 1228-1243 doi:10.1111/maps.12466 | Journal (article/letter/editorial) | | features in shatter cones in basalt from the Vista Alegre impact structure, Brazil 5 Lidia PITTARELLO1...the observed features. Shatter cones’ from the Vista Alegre impact structure, Brazil, formed in fine-grained...striated surface. These shatter cones formed in the Vista Alegre impact structure, Brazil, in the basalt of the...the Serra Geral Formation. As the Vista Alegre impact structure is relatively small (9.5 km in diameter)...GEOLOGICAL SETTING AND SAMPLE DESCRIPTION The Vista Alegre structure, Brazil, is a 9.5 km diameter circular |  | CRÓSTA, Alvaro P., KAZZUO-VIEIRA, César, PITARELLO, Lidia, KOEBERL, Christian, KENKMANN, Thomas (2012) Geology and impact features of Vargeão Dome, southern Brazil. Meteoritics & Planetary Science, 47 (1) 51-71 doi:10.1111/j.1945-5100.2011.01312.x | Journal (article/letter/editorial) | | interior of the structure. Vargeão, as well as Vista Alegre and the possible Cerro do Jarau structure, were...Dome (40 km diameter), Vargeão Dome (12.4 km), Vista Alegre (9.5 km), Serra da Cangalha (13.7 km), and Riachão...Crósta et al. 2010a). Araguainha, Vargeão, Vista Alegre, and Cerro do Jarau are located in the Paraná...2007). Thus, Lonar, together with Vargeão Dome, Vista Alegre, and possibly Cerro do Jarau, are the few meteorite...decreasing abundance, quartz, plagioclase, and calcite. The shape of the fragments in the matrix is generally |  | Arena, K.R., Hartmann, L.A., Baggio, S.B. (2014) Geological controls of copper, gold and silver in the Serra Geral Group, Realeza region, Paraná, Brazil. Ore Geology Reviews, 63. 178-200 doi:10.1016/j.oregeorev.2014.05.005 | Journal (article/letter/editorial) | | Avenida Bento Gonçalves, 9500; 91501-970 Porto Alegre, Rio Grande do Sul, Brazil ED E-mail addresses:...Avenida Bento ED Gonçalves, 9500; 91501-970 Porto Alegre, Rio Grande do Sul, Brazil ABSTRACT PT The Serra...region of Tenente Portela (20 km to the west of Vista Alegre), Rio Grande do Sul, 85 occurrences of native...Jacutinga, CE Paraná (few kilometers northeast of Boa Vista da Aparecida). This was the only sample of panning...occurrences RI P T (native copper, quartz, calcite and others) filling vesicles and interfragmental |  | MAGLAMBAYAN, Victor B., ISHIYAMA, Daizo, MIZUTA, Toshio, IMAI, Akira, ISHIKAWA, Yohei (1998) Geology, Mineralogy, and Formation Environment of the Disseminated Gold-Silver Telluride Bulawan Deposit, Negros Occidental, Philippines. Resource Geology, 48 (2) 87-104 doi:10.1111/j.1751-3928.1998.tb00009.x | Journal (article/letter/editorial) | | mostly with calcite and dolomite-ankerite minerals. Fluid inclusions in quartz and calcite in clasts of...300° to 400°C while fluid inclusions in quartz, calcite and sphalerite within the dacite porphyry breccia...breccias also occur as thin to the NE-trending Vista Alegre Fault Zone (Bobis and (5 cm) veins and 30–50...polished sections of rocks and ores collected from the mine workings and drill cores were examined under the...5 Alteration map of sampled areas in the Bulawan mine workings. The contact between andesites and quartz |  | | Journal (article/letter/editorial) | | accepted by a large majority of the impact research community knowing that none of these models is able to account...shatter cones in the polymict breccia from the Vista Alegre structure of Brazil (e.g., Cr osta et al. 2010;... 1393 2012; Yokoyama et al. 2015) and the Vista Alegre structure (Pittarello et al. 2015). There may...known are considered a result of replacement of calcite by silica. The cones are developed perpendicular...Granitoid, Metasediment Sandstone, Quartzite Calcite Schist, Granite Limestone Sedimentary rock Breccia |  | | Journal (article/letter/editorial) | | Federal do Rio Grande do Sul , 91501-970 , Porto Alegre , Rio Grande do Sul , Brazil Published online:...Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil Downloaded by [Selcuk...and filling of cavities with silica minerals and calcite. Careful field observations were integrated with...studied region is located 50 km north of Porto Alegre, in the state of Rio Grande do Sul, Brazil, in...salmon calcite and late white calcite. A fracture surface in a sand dike is covered by calcite, so the |  | Hartmann, Léo Afraneo, da Cunha Duarte, Lauren, Massonne, Hans-Joachim, Michelin, Cassiana, Rosenstengel, Leonardo Manara, Bergmann, Magda, Theye, Thomas, Pertille, Juliana, Arena, Karine Rosa, Duarte, Sandro Kucera, Pinto, Viter Magalhães, Barboza, Eduardo Guimarães, Rosa, Maria Luiza C.C., Wildner, Wilson (2012) Sequential opening and filling of cavities forming vesicles, amygdales and giant amethyst geodes in lavas from the southern Paraná volcanic province, Brazil and Uruguay. International Geology Review, 54 (1) 1-14 doi:10.1080/00206814.2010.496253 | Journal (article/letter/editorial) | | Rio Grande do Sul, Avenida Bento Gonçalves, Porto Alegre, Rio Grande do Sul, Brazil b Departamento de Materiais...Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil c Institut für Kristallchemie...of Brazil (CPRM), Rua Banco da Província, Porto Alegre, Rio Grande do Sul, Brazil e Departamento de Geologia...Rio Grande do Sul, Avenida Bento Gonçalves, Porto Alegre, Rio Grande do Sul, Brazil; b Departamento de Materiais...Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil; c Institut für Kristallchemie |  | Baggio, S.B., Hartmann, L.A., Andrade, R.H.P., Rizzotto, G.J., Duarte, S.K., Knijnik, D.B., Simões-Neto, J.A. (2015) Basalt stratigraphy and silica gossans in Campo Grande and Serra de Maracaju, Mato Grosso do Sul, Paraná Volcanic Province. Ore Geology Reviews, 69. 73-87 doi:10.1016/j.oregeorev.2015.01.015 | Journal (article/letter/editorial) | | Gonçalves, 9500; Bairro Agronomia; 91501-970 Porto Alegre, Rio Grande do Sul, b MA Brazil Departamento...MA Gonçalves, 9500 Agronomia; 91501-970 Porto Alegre, Rio Grande do Sul, Brazil Departamento Nacional...province, strongly indicating the presence of calcite, amethyst and agate geode deposits along with native...hydrothermal fluids producing voluminous secondary calcite infillings in the amygdales IP and fractures...The deposits are either silica minerals (also calcite) or native NU copper. The origin of silica is |  | Pittarello, Lidia, Roszjar, Julia, Mader, Dieter, Debaille, Vinciane, Claeys, Philippe, Koeberl, Christian (2015) Cathodoluminescence as a tool to discriminate impact melt, shocked and unshocked volcanics: A case study of samples from the El'gygytgyn impact structure. Meteoritics & Planetary Science, 50 (11) 1954-1969 doi:10.1111/maps.12559 | Journal (article/letter/editorial) | | Logancha in Russia (Masaitis 1999), as well as Vista Alegre and Varge~ ao in Brazil (Cr osta et al. 2010...obliterated by the occurrence of secondary carbonates, calcite in particular, which has a strong orange luminescence... The red spots likely correspond to secondary calcite. c) Detail SE-SEM image of the selected clasts...hydrothermally altered volcanic rocks (Almeria, Spain). Spectroscopy Letters 45:104–108. Boggs S., Krinsley...The first description and confirmation of the Vista Alegre impact structure in the Parana flood basalts |  | | Journal (article/letter/editorial) | | Engelhardt et al. 1992) and basaltic target rocks (Vista Alegre; Cr osta et al. 2010). However, detailed petrographic...fractures. C) Fractures in quartz grain filled with calcite and apatite. D) Scanning electron microscope (SEM)...and biotite. Ap = apatite, Bt = biotite, Cc = calcite, Ksp = potassium feldspar, Ox = Fe-Ti oxide, Pl...mineralogy and chemical composition. Unshocked quartz, calcite, and apatite (Fig. 3C), which are probably of hydrothermal...The first description and confirmation of the Vista Alegre impact structure in the Parana flood basalts |  | Chennaoui Aoudjehane, Hasnaa, El Kerni, Houda, Reimold, Wolf Uwe, Baratoux, David, Koeberl, Christian, Bouley, Sylvain, Aoudjehane, Mohamed (2016) The Agoudal (High Atlas Mountains, Morocco) shatter cone conundrum: A recent meteorite fall onto the remnant of an impact site. Meteoritics & Planetary Science, 51 (8) 1497-1518 doi:10.1111/maps.12661 | Journal (article/letter/editorial) | | carbonaceous marl/shale with slightly magnesiumcarrying calcite and relatively low but somewhat variable amounts...uniform orange luminescence as is typical for calcite (Fig. 12). Intensity variations of the orange luminescence...occurrences, and some other impact structures (e.g., Vista Alegre, Brazil—Cr osta et al. 2009, 2010) were also...and Jalufka D. 2009. Shatter cones confirm the Vista Alegre meteorite impact structure in the Parana flood...C., Furuie R. A., and Kazzuo-Vieira C. 2010. Vista Alegre, southern Brazil: A new impact structure in |  | | Journal (article/letter/editorial) | | ruban~s avec plus accessoirement muscovite, ~pidote, calcite, sph~ne et prdsence dans ces gneiss de mobilisats...roches vertes. Dans ce complexe, le granite de Vista Alegre au N W du pays a donn~ un Age de 1941 .+-107...KrOner, A. et Ledent, D., 1979. The age of the Vista Alegre Pluton and its bearing on the reinterpretation |  | | Report (issue) | | Tetuan Fm AV Avispa Lava MAS Mameyes Lava VAL Vista Allegre Fm JA Jayuya Tuff PE Perchas Lava [11]...phase III 66. Tetuan Formation 67e Mameyes Lava 68. Vista Allegre Formation Paleocene (?) Paleocene—Eocene...Formation in Fig. 1), and marine basalt of the Vista Allegre Sandstone in the west. Along its northern...augite-rich basalt and sandstone accumulations of the Vista Allegre Formation, the original Robles designation...contemporaneous with the upper pre-Robles VSA. The Vista Alegre—Tetuan VSA conformably overlies, and locally |  | | Journal (article/letter/editorial) | | formation; (5) Gu4na basement; (6) major thrusts. calcite libre sont souvent abondants. On y observe des...rdpidote, le quartz xdnomorphe, la biotite et la calcite. Les plagioclases sont rares et recristallis4s...au moins 75% de la roche et constitue avec la calcite et le quartz l'essentiel de la paragen~se. Accessoirement...ces amygdales est associd h l'4pidote et h la calcite. Ces amygdales sont interpr4t4es (Tack, 1975; Ntumgicimpaye...La biotite magn4sienne peut ~tre abondante, la calcite et les min4raux opaques sont rares; localement |  | Ikehata, Kei, Chida, Kohsuke, Tsunogae, Toshiaki, Bornhorst, Theodore J. (2016) HYDROTHERMAL NATIVE COPPER IN OCEAN ISLAND ALKALI BASALT FROM THE MINEOKA BELT, BOSO PENINSULA, CENTRAL JAPAN. Economic Geology, 111 (3) 783-794 doi:10.2113/econgeo.111.3.783 | Journal (article/letter/editorial) | | precipitated in the amygdules or veins along with calcite and analcime. The temperature of precipitation...as estimated by fluid inclusions trapped in the calcite containing grains of the native copper. The native...5 mm diam) are white in appearance and contain calcite and in some cases native copper, analcime, and...Irregularly shaped native copper grains occur in the calcite and analcime amygdules (Fig. 4a) and/or veins (Fig...4b-d). Amygdules are mostly monomineralic whereas calcite, analcime, and native copper can coexist in the |  | Dekov, Vesselin M., Rouxel, Olivier, Asael, Dan, Hålenius, Ulf, Munnik, Frans (2013) Native Cu from the oceanic crust: Isotopic insights into native metal origin. Chemical Geology, 359. 136-149 doi:10.1016/j.chemgeo.2013.10.001 | Journal (article/letter/editorial) | | basalt unit (Fig. 1). This limestone is composed of calcite, clays, hematite and quartz and shows a variety...pyroclastics recrystallized limestones (with high-Mg calcite) occur at the contact with the underlying basalt...basalt that is highly fractured (veins of calcite) and altered. 2.2. Site 216 Drilling at Site 216 (DSDP...chlorite and talc; (2) goethite and smectite; (3) calcite and celadonite. The sequential precipitation of...subvertical fractures filled with smectite and calcite. It is supposed (Eldholm et al., 1987) that these |  | | Journal (article/letter/editorial) | | cones from the polymict impact breccia of the Vista Alegre (Pittarello et al. 2015) and from the Araguainha...Hecht L., and Deutsch A. 2015. Shock behavior of calcite and basalt in a MEMIN hypervelocity impact experiment...features in shatter cones in basalt from the Vista Alegre impact structure Brazil. Meteoritics & Planetary |  | | Journal (article/letter/editorial) | | traversing the basalt are mostly filled 4 by calcite veinlets, some of which contain copper mineralization...shapes, whitish in color, and are filled mostly by calcite, zeolite, and silica (Figs. 3a, b, 4a-m). Some...chlorite and rimmed by goethite (Figs. 4d-g). Calcite 7 Calcite is a common mineral filling joints/fractures...seen as a three-dimensional network in outcrop. Calcite also occurs within phenocrysts and groundmass and...state (Figs. 4c, k), is mostly altered to calcite (Fig. 4j). Calcite is also an alteration product of diopside |  | DEWING, Keith, PRATT, Brian R., HADLARI, Thomas, BRENT, Tom, BÉDARD, Jean, RAINBIRD, Robert H. (2013) Newly identified “Tunnunik” impact structure, Prince Albert Peninsula, northwestern Victoria Island, Arctic Canada. Meteoritics & Planetary Science, 48 (2) 211-223 doi:10.1111/maps.12052 | Journal (article/letter/editorial) | | Linear feature at right is later (cross-cutting) calcite-filled vein. Upper member of Wynniatt Formation...The first description and confirmation of the Vista Alegre impact structure in the Parana flood basalts |
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