 | 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) | | amygdales and giant amethyst geodes in lavas from the southern Paraná volcanic province, Brazil and Uruguay a...Federal do Rio Grande do Sul, Avenida Bento Gonçalves, Porto Alegre, Rio Grande do Sul, Brazil b Departamento...Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil c Institut für Kristallchemie...Geological Survey of Brazil (CPRM), Rua Banco da Província, Porto Alegre, Rio Grande do Sul, Brazil e Departamento...Geologia, Universidade Federal da Roraima, Rio Branco, Roraima, Brazil Published online: 06 Aug 2010. To cite |  | Gilg, H. Albert, Morteani, Giulio, Kostitsyn, Yuri, Preinfalk, Christine, Gatter, Istvan, Strieder, Adelir J. (2003) Genesis of amethyst geodes in basaltic rocks of the Serra Geral Formation (Ametista do Sul, Rio Grande do Sul, Brazil): a fluid inclusion, REE, oxygen, carbon, and Sr isotope study on basalt, quartz, and calcite. Mineralium Deposita, 38 (8) 1009-1025 doi:10.1007/s00126-002-0310-7 | Journal (article/letter/editorial) | | Genesis of amethyst geodes in basaltic rocks of the Serra Geral Formation (Ametista do Sul, Rio Grande...Grande do Sul, Brazil): a fluid inclusion, REE, oxygen, carbon, and Sr isotope study on basalt, quartz, and... Abstract In the Ametista do Sul area, Rio Grande do Sul, Brazil, amethyst-bearing geodes are hosted...cavity. Fluid inclusions in colorless quartz and amethyst are predominantly monophase and contain an aqueous...University of Rio Grande do Sul, Oswaldo Aranha 99/504, 90035-190 Porto Alegre (RS), Brazil rare. Some |  | Duarte, Lauren C., Hartmann, Leo A., Ronchi, Luiz H., Berner, Zsolt, Theye, Thomas, Massonne, Hans J. (2011) Stable isotope and mineralogical investigation of the genesis of amethyst geodes in the Los Catalanes gemological district, Uruguay, southernmost Paraná volcanic province. Mineralium Deposita, 46 (3) 239-255 doi:10.1007/s00126-010-0323-6 | Journal (article/letter/editorial) | | mineralogical investigation of the genesis of amethyst geodes in the Los Catalanes gemological district...S) and mineralogical studies of the world-class amethyst-geode deposits of the Los Catalanes gemological...silica minerals in geodes (chalcedony, quartz, and amethyst) are much larger and the values generally somewhat...Uruguayan deposits than in the Ametista do Sul area of southern Brazil. The range of δ34S values (−15.0 to...world producers of amethyst and agate geodes (600 tons/month) are Brazil (Ametista do Sul) and Uruguay (Los |  | Hartmann, L.A., Medeiros, J.T.N., Baggio, S.B., Antunes, L.M. (2015) Controls on prolate and oblate geode geometries in the Veia Alta basalt flow, largest world producer of amethyst, Paraná volcanic province, Brazil. Ore Geology Reviews, 66. 243-251 doi:10.1016/j.oregeorev.2014.11.005 | Journal (article/letter/editorial) | | flow, largest world producer of amethyst, Paraná volcanic province, Brazil L.A. Hartmann a,⁎, J.T.N. Medeiros...Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, 91501-970...Alegre, Rio Grande do Sul, Brazil Instituto de Física, Universidade Federal do Rio Grande do Sul, Avenida...Gonçalves, 9500, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil a r t i c l e i n f o Article history:...2014 Available online 13 November 2014 Keywords: Amethyst geode Veia Alta flow Prolate Oblate Hydrothermal |  | Gilg, H. Albert, Krüger, Yves, Taubald, Heinrich, van den Kerkhof, Alfons M., Frenz, Martin, Morteani, Giulio (2014) Mineralisation of amethyst-bearing geodes in Ametista do Sul (Brazil) from low-temperature sedimentary brines: evidence from monophase liquid inclusions and stable isotopes. Mineralium Deposita, 49 (7) 861-877 doi:10.1007/s00126-014-0522-7 | Journal (article/letter/editorial) | | ARTICLE Mineralisation of amethyst-bearing geodes in Ametista do Sul (Brazil) from low-temperature sedimentary...giant amethyst-bearing geodes in Early Cretaceous Paraná continental flood basalts at Amestita do Sul,... Brazil. Monophase liquid inclusions in colourless quartz, amethyst, calcite, barite and gypsum were...organotrophic bacteria. During the subsequent stages II (amethyst, goethite and anhydrite), III (early Editorial...homogenisation temperatures and in δ18O values of amethyst show evidence of repeated pulses of ascending |  | 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) | | native copper in the Paraná volcanic province, Brazil, integrating Cu stable isotopes in a multi-analytical...varies from −0.9‰ in the southeastern portion (Rio Grande do Sul state) to 1.9‰ in the central portion (Paraná...Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil 2 Leibniz Universität...al. 2009) in southeastern South America, mainly Brazil but including portions of Uruguay, Argentina, and...al. 1988) and in the Etendeka (Peate 1997). In Brazil, PVP rocks belong to the Serra Geral Group (Wildner |  | | Journal (article/letter/editorial) | | candidate worthy of discussion. For those of you who do not know what perimorph means, let’s start with a...and which is the mold, but that is an issue that I do not care to deal with here. If anyone wants to call...specimen #21338, Harry Taylor photo. Figure 2. Amethyst quartz encrusting scalenohedral calcite crystals...part of a geode from the Danialo mine, Rio Grande do Sul, Brazil; “star” cluster 13 cm across. Smithsonian...Figure 3. Quartz casts after anhydrite, Rio Grande do Sul, Brazil; 25 x 19 cm. Smithsonian specimen “H #R19327 |  | | Report (issue) | | of America PHOTO CREDITS Cover: Quartz variety amethyst, 10.5 cm tall Goboboseb Mountains, Erongo Region...collection, Jeff Scovil photo Title (facing) Page Amethyst mouse with gold tail, 130 grams, 6.3 cm wide Carved...Brazilian amethyst Private collection, Robert Weldon photo © 2009 GIA Page 2 Quartz variety amethyst, 3.5...3, Table of Contents Insets Top: Circa 212 CE amethyst intaglio bearing the portrait of Roman Emperor...Marie-Lan Nguyen photo Upper middle: Quartz variety amethyst (Japan-law twin), 1.6 cm tall Andilamena, Toamasina |  | | Journal (issue) | | Radioactivity C h a r l e s E. Asl7baugh I I I Amethyst from Brazil D a v i d S t a n l e y Epstein NOTES AND...that had been irradiated in nuclear reactors in Brazil and released while they were still highly radioactive...of facilities active in the U.S. as well as in Brazil, Europe, and Southeast Asia. According to the American...United States, and not necessarily GIA's, However, we do applaud the Nuclear Regulatory Con~mission's recent...brown, "blue," "black" Colorless to yellow Brown, amethyst, or pale green "smoky," rose Colorless, "straw |  | 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) | | the Serra Geral Group, Realeza region, Paraná, Brazil K.R. Arena, L.A. Hartmann, S.B. Baggio PII: DOI:...the Serra Geral Group, Realeza region, Paraná, Brazil, Ore Geology Reviews (2014), doi: 10.1016/j.oregeorev... Paraná, Brazil MA NU Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Avenida...Gonçalves, 9500; 91501-970 Porto Alegre, Rio Grande do Sul, Brazil ED E-mail addresses: PT Karine da...Serra Geral Group, Realeza region, SC Paraná, Brazil MA NU Karine da Rosa Arena, Léo Afraneo Hartmann* |  | | Book | | Professor Jacques P. Cassedanne Universidade Federal do Rio de Janeiro For his valuable participation in research...1982 Jules Roger Sauer ” Foreword For years Brazil has been the major producer of colored stones in...metamorphic rocks, the variety of gem deposits in Brazil is almost infinite. In addition to the mineral...assemblage one might expect from pegmatite dikes, Brazil also produces a very significant output of diamonds...written in English, and beautifully illustrated. “Brazil, Paradise of Gemstones’, by Jules Roger Sauer, |  | Fulfaro, V. J., Saad, A. R., Perinotto, J. A. J., Etoherehere, M. L. C., Verolavsky, G. (1997) Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay. International Geology Review, 39 (8) 703-722 doi:10.1080/00206819709465297 | Journal (article/letter/editorial) | | com/loi/tigr20 Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay a a a V. J. Fulfaro ...Paulista (UNESP) , Caixa Postal 178, Rio Claro SP, 13506-900, Brazil b Institute de Geologia y Paleontologia...(1997) Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay, International Geology Review... Paraná Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay V. J. F U L F A R O , A...Paulista (UNESP), Caixa Postal 178, 13506-900 Rio Claro SP, Brazil Downloaded by [University of Colorado - |  | 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) | | and silica gossans in Campo Grande and Serra de Maracaju, Mato Grosso do Sul, Paraná Volcanic Province...and silica gossans in Campo Grande and Serra de Maracaju, Mato Grosso do Sul, Paraná Volcanic Province...silica gossans in Campo Grande and Serra de Maracaju, T Mato Grosso do Sul, Paraná volcanic province...Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Avenida Bento NU a SC R D.B. Knijnika...Agronomia; 91501-970 Porto Alegre, Rio Grande do Sul, b MA Brazil Departamento Nacional de Produção |  | | Journal (article/letter/editorial) | | 2. A skunk from Artigas, Uruguay, in which the amethyst crystals are aligned along the centers of a rhombohedral...March/April 1997 issue of Rocks & Minerals. This amethyst on calcite skunk from Artigas, Uruguay, is certainly...rhombohedron instead of a scalenohedron, and the amethyst is distributed down the centers of three rhombohedral...02:16 14 March 2015 Figure 3b Figures 3a and 3b. Amethyst on calcite skunk from Artigas, Uruguay. The specimen...specimen and photos. Figure 4. Large plate of amethyst from Artigas, Uruguay, with a pair of skunks showing |  | | Journal (article/letter/editorial) | | Hematite in quartz, field of view 3 mm, Minas Gerais, Brazil. John Koivula photo. U nfortunately, at some...the wispy bloodred inclusions in quartz (variety amethyst, mostly) were the quite rare mineral lepidocrocite...lepidocrocite is cited as either an inclusion in amethyst from Brazil or as an associated mineral, not an inclusion...lepidocrocite is verified in association with Brazilian amethyst. The first of these (Gilg et al. 2003) stated...well as lepidocrocite and goethite needles in amethyst.” Upon writing to the senior author, H. A. Gilg |  | | Book | | until he managed to reach the land of his dreams, Brazil. A specialist in the field of geology and mineralogy...crystals and the remarkable mineral treasures of Brazil, as well as the incredible adventures and difficulties...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL Cyan Magenta Yellow Black 1 Delev Ilia Deleff...UNIQUE MINERALS IN WORLD MUSEUMS GEM TREASURES OF BRAZIL SOFIA–MOSCOW 2004 3 Cyan Magenta Yellow Black...MINERAL TREASURES OF BRAZIL 76 85 AN OUTLINE OF THE MINERAL RESOURCES OF BRAZIL ORIGIN OF GIANT CRYSTALS |  | | Journal (article/letter/editorial) | | of the Paraná volcanic province, Novo Hamburgo, Brazil a a Léo Afraneo Hartmann , Sérgio Benjamin Baggio...Universidade Federal do Rio Grande do Sul , 91501-970 , Porto Alegre , Rio Grande do Sul , Brazil Published online:...of the Paraná volcanic province, Novo Hamburgo, Brazil, International Geology Review, 55:4, 510-524, DOI:...of the Paraná volcanic province, Novo Hamburgo, Brazil Léo Afraneo Hartmann*, Sérgio Benjamin Baggio and...Universidade Federal do Rio Grande do Sul, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil Downloaded by |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Crystal of multicolored tourmaline (84 x 26 mm), Lavra do Sapo, Ferruginha, Conselheiro Pena, Minas Gerais...(Camara Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo...pedras preciosas do Brasil Bibliography 1. Gemology 2. Geology 3. Minerals - Brazil 4. Minerals- Classification... Mineralogy 6. Mineralogy - Brazil - History 7. Precious stones - Brazil I. Bartorelli, Andrea. II. Title |  | | Journal (article/letter/editorial) | | they are widespread in other areas (e.g. Rio Grande do Sul, Brazil; Agate Creek, Australia; and Dunure, Scotland)...walllining bands, the large immature agates from Brazil are the most likely to reveal property differences...and sectioned from the outer edge to centre. (a) Brazil-51 a horizontally banded control agate; I and II...and thin sections respectively, for Brazil-51 and Brazil-1. (b) Brazil-1 a combined horizontally banded...enlargement of the thin reed-like growths. (c) Brazil-72 and (d) Brazil-10; wall-lining control agates. Samples |  | | Journal (article/letter/editorial) | | St. Egidien, Chemnitz and Zwickau), Brazil (Rio Grande do Sul), Scotland (Ayrshire) and the USA (Montana)...Schlottwitz, St. Egidien and Zwickau) and each one from Brazil, Scotland and the USA, respectively. The material...Basic volcanic rock (basalt) ~135 Ma 2 (Rio Grande do Sul, Brazil) Age of Host Measurements Per Location...Basic volcanic rock (basalt) ~135 Ma 2 (Rio Grande do Sul, Brazil) Zwickau- Planitz Acidic volcanic rock...==macrocrystalline macrocrystalline quartz, quartz, h= = host (Brazil), (b)(b) Heads of Ayr, Dunure area (Scotland), |  | | Journal (article/letter/editorial) | | district, Paraná basaltic province, southernmost Brazil a a Viter Magalhães Pinto , Léo Afraneo Hartmann...Universidade Federal do Rio Grande do Sul , Porto Alegre, Brazil b CPRM – Geological Survey of Brazil , Porto Alegre...Alegre, Brazil Published online: 12 Feb 2010. To cite this article: Viter Magalhães Pinto , Léo Afraneo...district, Paraná basaltic province, southernmost Brazil, International Geology Review, 53:10, 1163-1179...district, Paraná basaltic province, southernmost Brazil 1938-2839 Geology Review, 0020-6814 TIGR International |  | | Journal (article/letter/editorial) | | Mineralogical Association MINERALOGY IN BRAZIL The image of Brazil as a fabulous place for minerals is a...present scientific environment in Brazil. Mineralogists in Brazil are experiencing the best job market...market in 30 years. The vast piece of land known as Brazil, the only Portuguese-speaking country in Latin...wealth is poorly distributed among the population, Brazil is an El Dorado for mineralogists and Earth scientists...where much has been done and much more is still to do. The Brazilian autochthonous, pre-colonial population |  | Voudouris, Panagiotis, Melfos, Vasilios, Mavrogonatos, Constantinos, Tarantola, Alexandre, Gӧtze, Jens, Alfieris, Dimitrios, Maneta, Victoria, Psimis, Ioannis (2018) Amethyst Occurrences in Tertiary Volcanic Rocks of Greece: Mineralogical, Fluid Inclusion and Oxygen Isotope Constraints on Their Genesis. Minerals, 8 (8) 324 doi:10.3390/min8080324 | Journal (article/letter/editorial) | | minerals Article Amethyst Occurrences in Tertiary Volcanic Rocks of Greece: Mineralogical, Fluid Inclusion...Epithermally altered volcanic rocks in Greece host amethyst-bearing veins in association with various silicates...alternations of amethyst, chalcedony and/or carbonates is a common characteristic of the studied amethyst-bearing...propylitic and zeolitic types. Precipitation of amethyst took place from near-neutral to alkaline fluids...Fluid inclusion data suggest that the studied amethyst was formed by hydrothermal fluids with relatively |  | | Journal (article/letter/editorial) | | rock. Many crystal-lined cavities of other types do not behave in this manner. For example, figure 4...their distinction from other entities, even if they do have many similarities. Other void spaces in rocks...cavities can form from exsolved gas bubbles that do not escape the magma before it solidifies or from...igneous geodes (fig. 3), which are common in Mexico, Brazil, Uruguay, and other countries, are essentially...These include the sometimes very large elongate amethyst geodes called “cathedrals.” Thus, one way to distinguish |  | | Journal (issue) | | mm uit de Das Antas tunnel, Veranópolis, Rio Grande do Sul, Brazilië. Verzameling en foto © Stefan Koch...2015 Zeolieten uit de Das Antas Tunnel, Rio Grande do Sul, Brazilië Paul Van hee Voor wij vanaf de...Indische zeolieten was de 'Das Antas tunnel' in Rio Grande do Sul, Brazilië een van de interessantste vindplaatsen...markt met als vindplaats 'Das Antas Tunnel', Rio Grande do Sul, Brazilië, soms zonder matrix maar meestal...dat de eerste zending agaat uit de staat Rio Grande do Sul in Idar-Oberstein er reeds aankwam in de herfst |
|
Ametista do Sul, Rio Grande do Sul, Brazil