 | 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) | | 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 Received: 8 March 2002 / Accepted: 19 June 2002...Springer-Verlag 2002 Abstract In the Ametista do Sul area, Rio Grande do Sul, Brazil, amethyst-bearing geodes are...agate and colorless and finally amethystine quartz. Calcite formed throughout the whole crystallization sequence...University of Rio Grande do Sul, Oswaldo Aranha 99/504, 90035-190 Porto Alegre (RS), Brazil rare. Some |  | 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) | | Mineralisation of amethyst-bearing geodes in Ametista do Sul (Brazil) from low-temperature sedimentary brines:...Amestita do Sul, Brazil. Monophase liquid inclusions in colourless quartz, amethyst, calcite, barite and...Schweitenkirchen, Germany subhedral calcite) and IV (barite, late subhedral calcite and gypsum), the oxidation...temperatures between 40 and 80 °C, while the different calcite generations and late gypsum precipitated at temperatures...Flood Basalt (CFB) Province in southern Brazil (Ametista do Sul) and Uruguay (Artigas), i.e. in rocks with |  | 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) | | lavas from the southern Paraná volcanic province, Brazil and Uruguay a b c Léo Afraneo Hartmann , Lauren...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 |  | 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) | | Uruguayan deposits than in the Ametista do Sul area of southern Brazil. The range of δ34S values (−15...and agate geodes (600 tons/month) are Brazil (Ametista do Sul) and Uruguay (Los Catalanes). The cylindrical...Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil e-mail: lauren.duarte@ufrgs...Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 950091501-970, Porto Alegre, Rio Grande do Sul, Brazil...Universidade Federal de Pelotas, Pelotas, Rio Grande do Sul, Brazil e-mail: lrronchi@uol.com.br Z. Berner |  | 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) | | producer of amethyst, Paraná volcanic province, Brazil L.A. Hartmann a,⁎, J.T.N. Medeiros b, S.B. Baggio...Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500, 91501-970, Porto Alegre, Rio Grande do Sul,... Brazil Instituto de Física, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500...9500, 91501-970 Porto Alegre, Rio Grande do Sul, Brazil a r t i c l e i n f o Article history: Received...alteration of the Veia Alta basalt flow, Ametista do Sul, Brazil, exerted the fundamental control on the |  | | Journal (article/letter/editorial) | | along the centers of a rhombohedral calcite crystal. The calcite is 7 cm across. Rock H. Currier specimen...1997 issue of Rocks & Minerals. This amethyst on calcite skunk from Artigas, Uruguay, is certainly one of...of the finest examples known. The calcite is 12 cm high. Rock H. Currier specimen, Harold and Erica Van...term was, and is, used to refer to specimens of calcite crystals upon which trails or strings of smaller...edges, all converging at the termination of the calcite crystal. Even though I suspect that I had seen |  | 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) | | Hematite in quartz, field of view 3 mm, Minas Gerais, Brazil. John Koivula photo. U nfortunately, at some...is cited as either an inclusion in amethyst from Brazil or as an associated mineral, not an inclusion,...“Microscopic studies revealed the presence of tiny calcite crystal [sic], as well as lepidocrocite and goethite...authors refer to a yellow patina that covers much of calcite crystal surfaces, and they describe it as a “1...lepidocrocite.” They do not indicate how the “lepidocrocite” was identified, nor do they attempt to explain |  | 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) | | 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 |  | | 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) | | (often perfectly formed and usually of quartz or calcite and sometimes of Figure 2. A 9-cm sedimentary...macrocrystalline quartz and sometimes other minerals, e.g., calcite (Gilg et al. 2003; Proust and Foutain 2007; Duarte...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...photo. Figure 7. Septarian nodule lined with calcite (not a geode), 16 cm across, from near Orderville |  | 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* |  | | Report (issue) | | kind of jewelry and stones were favored by well-to-do customers four centuries ago. Sir Robert Eric Mortimer...influence on the world amethyst market emerged in Brazil (see page 66), where the discovery of rich deposits...foreigners (non Portuguese) doing business in Brazil influenced the availability, and therefore the...362-carat cushion-cut gem from the Jacobea Mine, Bahia, Brazil, that is housed in the Smithsonian. Another, a...rough, specimen 9.8 cm tall Amatitlan, Zumpango del Rio, Guerrero, Mexico Canadian Museum of Nature specimens |  | 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) | | presence of various amounts of gangue adularia, calcite, zeolites, chlorite and smectite. Fluid inclusion...substitutional, e.g., [3], or interstitial [5]. Brazil is the main amethyst producer today, counting more...Kornofolia area; (f) Veinlets of amethyst and calcite crosscutting zeolite-altered lavas in crystals...Kornofolia area; (f) Veinlets of amethyst and calcite crosscutting zeolite-altered lavas in Kirki area;...stalactitic pinkish chalcedony. Smectite, zeolites and calcite are accessory minerals both botryoidal or stalactitic |  | | 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) | | St. Egidien, Chemnitz and Zwickau), Brazil (Rio Grande do Sul), Scotland (Ayrshire) and the USA (Montana)...ppm) as well as the occurrence of paragenetic calcite and fluorite indicate that other fluids can play...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 |  | | Journal (article/letter/editorial) | | previous claims that agates from New Zealand and Brazil were formed long after their host. K E Y WO R D...Ma); Mt. Somers, New Zealand (89 Ma); Rio Grande do Sul, Brazil (135 Ma). Mt. Warning agates are white-...Somers, New Zealand (VT) Rum, Scotland (RL) Rio Grande do Sul Brazil & UK purchase Bobonong, Semolale, Botswana...ageing. Calcite identification Occasionally, powder XRD identifies traces of hidden calcite that has...previously examined batch was found to contain calcite. Tests were carried out using hydrochloric acid |  | | Journal (article/letter/editorial) | | and right handed quartz on the unit-cell scale: Brazil law twinning (Miehe & Graetsch, 1992). Since 1976...It is important to point out that curved detectors do have some inherent problems, such as linearity (Evain...Hunstanton flint (12-17 %, Heaney & Post (1992)), 2) Brazil (14 %), 3) Mexico (8 %), 4) Lake Superior (0 %)...agates used, apart from a few found in Scotland and Brazil, were smaller than 6 cm. For the present study...1. Mexico (38), 2. Iran (50), 3. BTVP (60), 4. Brazil (133), 5. Lune, Australia (145), 6. Agate Creek |  | | | | or the direct growth of crystalline chalcedony. Calcite is sometimes present but the silica content usually...Province, Scotland 9. Mt Somers, New Zealand 10. Rio do Sul, Brazil 11. Semolale, Botswana 12. Nova Scotia, Canada...Agates used for heat treatments were from Brazil (sample Brazil 64) and Nebraska, USA (sample Nebraska Blue...has used samples taken from the outer third of Brazil 64 agate and a cross section from the smaller Nebraska...Nebraska Blue 1 agate. Sections from the agates Brazil 64 and Nebraska Blue 1 were crushed and sieved |  | | Journal (article/letter/editorial) | | deposits of celadonite occur in basalts of the Grande Ronde Basalt of the Columbia River Basalt Group...alteration minerals including quartz, chalcedony, opal, calcite, nontronite, saponite, and zeolites such as clinoptilolite...celadonite that has formed by alteration of Miocene Grande Ronde Basalts of the Columbia River Basalt Group...magnetostratigraphic unit of the Grande Ronde member of the Columbia River Basalts, exposed in the Grande Ronde River canyon...al. 1989), as well as feeder dikes for younger Grande Ronde Basalt flows. The N1 flows are between 16 |  | | Journal (issue) | | “Skunk” calcite: mineral paragenesis in an amethyst geode From Ametista, Rio Grande do Sul, Brazil . . ...(no doubt from the type locality at Corrego Frio, Brazil) in crystals to 2 inches, priced at $15; pink morganite...morganite beryl crystal groups from Brazil; and paravauxite from Llallagua, Bolivia, among many others...leader in the sale of Natural History can help you do that. 8-6177 00 HA.com/6 HA.co m /5009-2 8113... “Skunk” Calcite Mineral Paragenesis in an Amethyst Geode from Ametista, Rio Grande do Sul, Brazil David |  | | Journal (article/letter/editorial) | | Figure 9. Drusy analcime crystals with prehnite and calcite, 6.8 cm. Bruce Cairncross specimen. lies the Messum...Figure 13. A 2.4-cm spray of gypsum crystals in a calcite-lined vug. Uli Bahmann specimen. in the old tin... 18.2 cm, with two semispherical prehnites on calcite. Desmond Sacco specimen. shelters, most constructed...Figure 15. Hematite-stained quartz associated with calcite; field of view 4.8 cm. Uli Bahmann specimen. Figure...NaAlSi2O6•H2O, occurs together with prehnite, quartz, calcite, and heulandite in the prehnite diggings. It is |  | | Journal (issue) | | Articles 708 Coloured Stone Mining and Trade in Brazil: A Brief History and Current Status By Aurélien...Collection V. L. Villani photo p. 758 Cover Photo: Brazil is the source of a variety of coloured stones,...Saint-Clair Fonseca Junior (BC Gemas do Brasil, Governador Valadares, Brazil), and heating to 500°C in air was...material, it is likely to have been Rio Grande do Sul in Brazil, well known for its amethyst, agate and...Trade in Brazil: A Brief History and Current Status Aurélien Reys Coloured stones from Brazil have been |  | | Journal (article/letter/editorial) | | agate contains a small amount of co-deposited calcite with the a-quartz but it usually has a very high...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 |
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Ametista do Sul, Rio Grande do Sul, Brazil