 | 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) | | Basalt stratigraphy and silica gossans in Campo Grande and Serra de Maracaju, Mato Grosso do Sul, Paraná...Basalt stratigraphy and silica gossans in Campo Grande and Serra de Maracaju, Mato Grosso do Sul, Paraná...Basalt stratigraphy and silica gossans in Campo Grande and Serra de Maracaju, T Mato Grosso do Sul,...Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Avenida Bento NU a SC R D.B. Knijnika...9500; Bairro Agronomia; 91501-970 Porto Alegre, Rio Grande do Sul, b MA Brazil Departamento Nacional de |  | | Report (issue) | | United States of America PHOTO CREDITS Cover: Quartz variety amethyst, 10.5 cm tall Goboboseb Mountains...collection, Robert Weldon photo © 2009 GIA Page 2 Quartz variety amethyst, 3.5 cm tall Kakamunurle Mine...collection, Marie-Lan Nguyen photo Upper middle: Quartz variety amethyst (Japan-law twin), 1.6 cm tall...Zillertal Anton Watzl, Sr. photo, circa 2004 Bottom: Quartz variety amethyst, 6.7 cm tall Wattika Mine, Murzinka...the word "amethyst" refers to macrocrystalline quartz that is violet or purple and is derived from the |  | | Journal (article/letter/editorial) | | Scovil photo. MarcWApril: Amethyst and calcite, Artigas, Uruguay. Rock H. Currier specimen, Harold and Erica...Erica Van Pelt photo. MaylJune: Elbaite with quartz and albite, Tourmaline Queen mine, San Diego County...Jeff Scovil photo. Adularia, Michigan, I10 Agate, Uruguay, 94 Ajoite, Arizona, 23 Albite, California, 156;...46 Amethyst, Agate, and Calcite “Skunks” from Uruguay, R. H. Currier, 94-105 Ankerite, Missouri, 421;...Michigan, 110; Missouri, 370-77, 379-82, 404, 421; Uruguay, 94: Wiscon- sin, 346 Caledonite, Arizona, 26 |  | 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) | | varies from −0.9‰ in the southeastern portion (Rio Grande do Sul state) to 1.9‰ in the central portion (Paraná...1 Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil 2 Leibniz Universität...America, mainly Brazil but including portions of Uruguay, Argentina, and Paraguay (Fig. 1). The volumes...region, near the town of Frederico Westphalen (Rio Grande do Sul state), encouraged Costa (1982) to use geophysical...Supplementary Material (ESM 1) and shown in Fig. 1. In Rio Grande do Sul state, dendritic native copper on the surface |  | | Journal (article/letter/editorial) | | biostratigraphy of Pleistocene fluvial deposits in northern Uruguay, South America Martin Ubilla UBILLA, M. 2004. Mammalian...biostratigraphy of Pleistocene fluvial deposits in northern Uruguay, South America. Proceedings of the Geologists'...the Sopas Formation, which outcrop in northern Uruguay, have yielded freshwater molluscs, plants and vertebrates...mammalian biostratigraphy, fluvial, Late Pleistocene, Uruguay, Sopas Formation, Lujanian Stage Paleontologia...de la Republica, Igua 4225, 11400 Montevideo, Uruguay (email: ubilla@jcien.edu.uy) 1. INTRODUCTION It |  | | Journal (issue) | | intergrown clusters in pockets in a matrix of massive quartz and pyrite. Equally inconspicuous were radiating...sarurated blue and intergrown in massive. milky quartz. Andre offers the positive attitude that ..there...edge, growing on a base of 2-3 cm, lustrous, milky quartz. The specimens were originally coated by a thin...layer of approximately I mm, lustrous, snow-white quartz crystals. The thin, outer layer had been selectively...luster of the fluorite crystals and the underlying quartz crystals. Most of the remaining specimens had been |  | | Catalog/List | | concentrate on Brazil and Peru with occasional trips to Uruguay, Chile, and Colombia. Besides buying, he started...Nikolaevskiy Mine, Dalnegorsk, Russia, 1993. "RPG," Artigas, Uruguay, acquired 2008. RHC #8000. Record and Rocks...Arizona RRUFF Project. Another was the 7,500+ quartz in Minas Gerais, Brazil: a micromount collection.............................................198 Uruguay .................................................online, visit HA.com/5445 72018 Chrysocolla & Quartz var. “Gem” Chrysocolla Live Oak Pit, Inspiration |  | 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) | | Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay a a a V. J. Fulfaro , A. R. Saad...Universidad de la República , Montevideo, 11200, Uruguay Published online: 06 Jul 2010. To cite this article:...Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay, International Geology Review, 39:8...Basin: Mineral Resource Potentials in Brazil, Uruguay, and Paraguay V. J. F U L F A R O , A. R. S A A...Universidad de la República, 11200 Montevideo, Uruguay Abstract The Parana Basin is a Western Gondwanan |  | Murra, Juan A., Casquet, Cesar, Locati, Francisco, Galindo, Carmen, Baldo, Edgardo G., Pankhurst, Robert J., Rapela, Carlos W. (2016) Isotope (Sr, C) and U–Pb SHRIMP zircon geochronology of marble-bearing sedimentary series in the Eastern Sierras Pampeanas, Argentina. Constraining the SW Gondwana margin in Ediacaran to early Cambrian times. Precambrian Research, 281. 602-617 doi:10.1016/j.precamres.2016.06.012 | Journal (article/letter/editorial) | | which outcrops in northern Sierra Chica and Sierra Norte, with sedimentary input from western Gondwana sources...Sierras de Córdoba (Sierra Grande and in northwestern Sierra Chica and Sierra Norte) (Fig. 2) on the basis...orogeny magmatism in the Sierra Chica and Sierra Norte of Córdoba took place between 540 and 530 Ma (Rapela...the Sierra Chica belt on the east and the Sierra Grande belt on the west. The two belts are separated by...shows the more abundant marble outcrops. The Sierra Grande belt runs to the north and west of the large Devonian |  | | Journal (article/letter/editorial) | | University] at 06:56 07 October 2014 from the Del Norte Area, Saguache County, Colorado DANIEL E. KILE...80303 dekile@usgs.gov Figure 1. View of the Del Norte area, showing Tertiary rhyolite flows at center...since the late 1800s, the thunder-egg beds near Del Norte, Colorado, have provided the collector in recent...to completely filled with chalcedony, opal, or quartz and that may exhibit a geometrical, star-shaped...October 2014 Figure 2. Location map for the Del Norte thunder-egg beds. of special interest to collectors |  | | Book | | Amethyst flower (85 x 60 mm), Ametista do Sul, Rio Grande do Sul. Collection of Luiz Alberto Dias Menezes...577 The Pegmatitic Province of Paraiba, Rio Grande do Norte and Ceara 586 Uvites of extraordinary colors...619 The large quartz family 624 Rock crystal 630 Citrine 633 Smoky quartz 636 Rose quartz 641 Exceptional...Exceptional amethysts 653 Quartz with inclusions 656 Rutilated quartz 661 The chalcedony 665 The fascinating...phanerozoic sedimentary basins: geodes of amethyst quartz, agate, zeolites, apophyllite, silicified anhydrite |  | Santos, João Orestes Schneider, Hartmann, Léo Afraneo, Bossi, Jorge, Campal, Néstor, Schipilov, Alejandro, Piñeyro, Daniel, McNaughton, Neal Jesse (2003) Duration of the Trans-Amazonian Cycle and Its Correlation within South America Based on U-Pb SHRIMP Geochronology of the La Plata Craton, Uruguay. International Geology Review, 45 (1) 27-48 doi:10.2747/0020-6814.45.1.27 | Journal (article/letter/editorial) | | U-Pb SHRIMP Geochronology of the La Plata Craton, Uruguay a b c João Orestes Schneider Santos , Léo Afraneo...Survey of Brazil b Universidade Federal do Rio Grande do Sul c Universidad de La República d University...U-Pb SHRIMP Geochronology of the La Plata Craton, Uruguay, International Geology Review, 45:1, 27-48, DOI:...U-Pb SHRIMP Geochronology of the La Plata Craton, Uruguay JOÃO ORESTES SCHNEIDER SANTOS,1 Geological Survey...105, Santa Teresa, 90840-030 Porto Alegre, Rio Grande do Sul, Brazil Downloaded by [University of Connecticut] |  | Costa, Fabiana Pereira da, Fernandes, Jucielle Veras, Melo, Luiz Ronaldo Lisboa de, Rodrigues, Alisson Mendes, Menezes, Romualdo Rodrigues, Neves, Gelmires de Araújo (2021) The Potential for Natural Stones from Northeastern Brazil to Be Used in Civil Construction. Minerals, 11 (5) 440 doi:10.3390/min11050440 | Journal (article/letter/editorial) | | (PPG-CEMat), Materials Engineering Department, Federal University of Campina Grande, Av. Aprígio Veloso - 882...882, Bodocongó, Campina Grande, PB 58 429-900, Brazil; fabiana.costa@estudante.ufcg.edu.br (F.P.d.C.); ...University of Campina Grande, Av. Aprígio Veloso - 882, Bodocongó, Campina Grande, PB 58 429-900, Brazil...Limoeiro do Norte Limoeiro do Norte Limoeiro do Norte Limoeiro do Norte Limoeiro do Norte Santa Quitéria...to impurities such as clays, feldspars, micas, quartz, and sulfides, among others [39]. In some DTA curves |  | | Journal (article/letter/editorial) | | magmatism is very rare in the European Variscan Belt. A quarry where this microgranite intrusion has been exploited...types of quartz veinlets: type I with quartz, K-feldspar ± amblygonite; and type II with quartz and wolframite...Introduction Metal concentrations present in hydrothermal quartz veins, especially of tin minerals, have been interpreted...and quartz for the ceramic industry revealed the border of an aplite cross-cut by several quartz veinlets...associated with a magmatic system. As an example of quartz + wolframite veinlets which have been formed in |  | | Journal (article/letter/editorial) | | extrusive–intrusive rocks in the Playa Hermosa Formation in Uruguay: Regional and stratigraphic significance Leda Sánchez-Bettucci...Geofísica-Geotectónica, Iguá 4225, Malvin Norte, CP 11400, Montevideo, Uruguay CONICET — Universidad de Buenos...Neoproterozoic Peperites Quartz–syenite breccia Playa Hermosa Formation Uruguay a b s t r a c t Volcanic...Volcanic rocks in southern Uruguay are linked to an extensional tectonic regime related to the postcollisional...several units were defined. The basal unit is a quartz–syenite brecciated deposit, interpreted as the |  | Sáez, Reinaldo, Moreno, Carmen, González, Felipe, Almodóvar, Gabriel R. (2011) Black shales and massive sulfide deposits: causal or casual relationships? Insights from Rammelsberg, Tharsis, and Draa Sfar. Mineralium Deposita, 46 (5) 585-614 doi:10.1007/s00126-010-0311-x | Journal (article/letter/editorial) | | V/Cr and V/(V+Ni) ratios. Footwall shales at Filón Norte (Tharsis) show positive and eventually elevated...the Schiefermühle quarry, a black shale quarry contiguous to the mine. This quarry, used for backfilling...the black shale samples were taken from the Filón Norte open pit (see González et al. 2002 for sampling...Buchholz and Luppold (2008) from the Schiefermühle quarry. Geohistorical analysis of the stratigraphic record...Matte 1986, 1991; Piqué and Michard 1989; Martínez Catalán et al. 2002; Winchester et al. 2002; Simancas et |  | | Journal (article/letter/editorial) | | CHILE. M. E. Back and P: C. Wnlford, Mineralogy Department Royal Ontario Museum, Toronto, Ontario M5S 2C6...hydrothermal breccias that have been cemented by quartz, barite, and alunite. Rodalquilarite, a rare iron...cavities in the dolostone. The crystallization of the quartz and calcite was probably contemporaneous. In most...weathered away, releasing the scepters. Skeletal quartz crystals, often slightly smoky, are also commonly...crystals are more than 12 cm in maximum dimension. Quartz also occurs as single colorless, transparent crystals; |  | | Journal (article/letter/editorial) | | *65560::,<9:*/60*, ROBERT B. COOK Department of Geology and Geography Auburn University Auburn, Alabama...Rocks & Minerals, is a professor emeritus in the Department of Geology and Geography at Auburn, University...dominant component; this example is from Leiper’s quarry at Springfield, Delaware County, Pennsylvania (Peters...apatite, albite, muscovite, potassic feldspar, and quartz in the former, and bixbyite, topaz, sanidine, and...2 cm across occur in blocky albite in the Keith quarry at Auburn, Maine. Analyses of most other reported |  | | Report (issue) | | “steps” on its faces, perched on a bit of matrix with quartz and dolomite crystals. Of course we already know...the complexly color-zoned fluorite of Larkin’s quarry in the Townland of Shannapheasteen, County Galway...Grüll, have latched on to 11 specimens of Larkin quarry fluorite, all showing sharp, transparent, modified...(exploitation of which is the quarry’s purpose), with small quartz crystals and green chlorite dustings. The specimen...$335 - $1675). Fluorite, 4.8 cm, from Larkin’s quarry, Townland of Shannapheasteen, County Galway, Republic |  | Perea, Daniel, Soto, Matías, Sterli, Juliana, Mesa, Valeria, Toriño, Pablo, Roland, Guillermo, Da Silva, Jorge (2014) Tacuarembemys kusterae, gen. et sp. nov., a new Late Jurassic–?earliest Cretaceous continental turtle from western Gondwana. Journal of Vertebrate Paleontology, 34 (6) 1329-1341 doi:10.1080/02724634.2014.859620 | Journal (article/letter/editorial) | | Universidad de la República. Iguá 4225, Montevideo, Uruguay b Museo Egidio Feruglio. Av. Fontana 140, 9100...de Geociencias de Tacuarembó. Gral. Artigas 191, Tacuarembó, Uruguay Published online: 04 Nov 2014. To...Universidad de la Rep ublica. Igu a 4225, Montevideo, Uruguay, perea@fcien.edu.uy; matiassoto1@gmail.com; vmesa@fcien...Geociencias de Tacuaremb o. Gral. Artigas 191, Tacuaremb o, Uruguay, geocien@hotmail.com ABSTRACT—A...of the Tacuaremb o Formation, Parana Basin, Uruguay. The estimated length of the carapace is 18 cm |  | | Report (issue) | | BR-74 UNITED SPATES DEPARTMENT OF THE INTERIOR GEOLOGICAL SURVEY MINISTERIO DE MINAS E ENERGIA COMPANHIA...reserves, and resources potential .... 12 Rio Grande do Sul .................... 16 Location .......concentrates (minimum 70 percent WOo) from Rio Gr|ande do Norte for 1960-1972 ............. Table 2. Deposits...reserves, located principally in the State of Rio Grande do Norte, are estimated to be as high as 8,300,000 tons...are located in Sao Paulo, Santa Catarina, and Rio Grande do Sul. Both the scheelite and the wolframite deposits |  | | Journal (article/letter/editorial) | | Janeiro............................... 301 Rio Grande do Norte.............................................................. 305 Geologic maps of Rio Grande do Norte..............................................Bibliography of the geology ofRio Grande do N orte.................. 305 Rio Grande do .Sul.......................................... 308 Geologic maps of Rio Grande do Sul................................................... 308 Bibliography of the geology ofRio Grande do Sul........................ 309 Santa Catharina |  | | Report (chapter) | | NEUMANN2 & LUIZ DRUDE DE LACERDA3 1 NEG-LABISE, Department of Geology, Federal University of Pernambuco...Pernambuco, Recife, 50670-000, Brazil 2 LAGESE, Department of Geology, Federal University of Pernambuco, Recife...microspherules (Smit & Klaver 1981; Smit 1999) and shocked quartz in sedimentary rocks that registered the KTB (Bohor...drilled in the Olinda sub-basin (Fig. 1): Poty Quarry (52 m), Olinda town (62 m) and Itamaracá Island...Paraı́ba Basin and the three studied drill holes: Poty Quarry, Olinda and Itamaracá. (Modified from Nascimento |  | | Journal (article/letter/editorial) | | significance of LA-ICP-MS trace-element data on quartz from the Borborema Pegmatite Province, northeast...SILVA1 Federal University of Pernambuco (UFPE) Department of Geology; Rua Acadêmico Hélio Ramos s.n....16 July 2010; Accepted 12 July 2011] ABSTR ACT Quartz from different zones within five granitic pegmatites...Li (6150 ppm), B (19 ppm) and Ge (123 ppm) in quartz show a positive correlation with Al (30770 ppm)...these elements increase from the border zone to the quartz core of pegmatites of the spodumene or lepidolite |  | Romero, Bárbara, Kojima, Shoji, Wong, Chilong, Barra, Fernando, Véliz, Walter, Ruiz, Joaquin (2011) Molybdenite Mineralization and Re-Os Geochronology of the Escondida and Escondida Norte Porphyry Deposits, Northern Chile. Resource Geology, 61 (1) 91-100 doi:10.1111/j.1751-3928.2010.00150.x | Journal (article/letter/editorial) | | Re-Os Geochronology of the Escondida and Escondida Norte Porphyry Deposits, Northern Chile Bárbara Romero...Joaquin Ruiz3 1 Department of Geological Sciences, University of Católica del Norte, 2Minera Escondida...Escondida Ltd, Antofagasta, Chile and Department of Geosciences, University of Arizona, Tucson, Arizona, USA...Mo-bearing mineral in the Escondida and Escondida Norte deposits were characterized using several mineralogical...0.2 Ma, respectively. Re-Os dating of Escondida Norte molybdenites also show two distinct episodes, at |
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