 | Matteini, M., Junges, S.L., Dantas, E.L., Pimentel, M.M., Bühn, B. (2010) In situ zircon U–Pb and Lu–Hf isotope systematic on magmatic rocks: Insights on the crustal evolution of the Neoproterozoic Goiás Magmatic Arc, Brasília belt, Central Brazil. Gondwana Research, 17 (1) 1-12 doi:10.1016/j.gr.2009.05.008 | Journal (article/letter/editorial) | | evolution of the Neoproterozoic Goiás Magmatic Arc, Brasília belt, Central Brazil M. Matteini a,⁎, S.L. Junges...Universidade Federal de Ouro Preto, 35400, Ouro Preto, MG, Brazil Geochronology Laboratory, Instituto de Geociências...Universidade de Brasília, 70910 900, Brasília, DF, Brazil a r t i c l e i n f o Article history: Received...May 2009 Available online 18 May 2009 Keywords: Goiás Magmatic Arc LA-(MC) ICP-MS Hf isotopes Neoproterozoic...a b s t r a c t The Mara Rosa arc constitutes the northern portion of the Goiás Magmatic Arc, an important |  | | Journal (article/letter/editorial) | | StoneLine LateriticProfileof the PosseDeposit, Central Brazil CLAUDIO G. PORTO Universidade FederaldoRiodeJaneiro... CidadeUniversit•ria, RiodeJaneiro, 21910-240, Brazil AND MARTIN HALE International Institute for Aerospace...nearthe town of Mara (McFarlane,1976; Butt, 1981; Nahon, 1986). Although Rosa,Goi•ts, Brazil,some400 kmnorthofBras[lia(Fig...locallysiliceousand tigationshavebeenconductedin Brazil (Michel, 1987; Ol- cancontainseveralintercalationsof...5/a08-14 $4.00 308 Au REDISTRIBUTION,POSSEDEPOSIT,BRAZIL 309 m 0 --LEGEND-- T T T TOPSOILi::•:::':':' |  | | Journal (article/letter/editorial) | | assemblage from Neoproterozoic mélange, Central Brazil Matthew T. Brown, Reinhardt A. Fuck, Elton L. Dantas...assemblage from Neoproterozoic mélange, Central Brazil, Precambrian Research (2019), doi: https://doi...assemblage from Neoproterozoic mélange, Central Brazil Matthew T. Browna*, Reinhardt A. Fucka, Elton L...University of Brasília, Brasília, Federal District, 70910-900, Brazil *Corresponding author. E-mail address:...Abstract The Neoproterozoic Brasília belt, central Brazil, formed during the amalgamation of West Gondwana |  | | Journal (article/letter/editorial) | | Mafic-Ultramafic Complexes, western Borborema Province, Brazil: geochemical and isotope constraints for evolution...Mafic-Ultramafic Complexes, western Borborema Province, Brazil: geochemical and isotope constraints for evolution...Mafic-Ultramafic Complexes, western Borborema Province, Brazil: geochemical and isotope constraints for evolution...Brasilia, Brasilia, DF, Brazil ²CPRM – Geological Survey of Brazil, Recife, PE, Brazil *Corresponding author...Brígida domains, Borborema Province, Northeast Brazil. Ultramafic lithologies including metadunites, |  | | Book | | Alkmim Editors São Francisco Craton, Eastern Brazil Tectonic Genealogy of a Miniature Continent Regional...Alkmim • Editors São Francisco Craton, Eastern Brazil Tectonic Genealogy of a Miniature Continent 123...Estado do Rio de Janeiro Maracanã, Rio de Janeiro Brazil Fernando F. Alkmim Escola de Minas Universidade...Preto Ouro Preto Brazil Umberto G. Cordani Universidade de São Paulo São Paulo Brazil ISSN 2364-6438...significant contributor to the mining industry in Brazil. This book provides a state of knowledge overview |  | | Journal (article/letter/editorial) | | Ti-Fe ___Cr___Cu mineralization in northeastern Brazil H. Beurlen a, A.F. Da Silva Filho b, I.P. Guimar~esb...50000 Recife PE, Brazil bDepartamento de Geologia da UFPE, 50000 Recife PE, Brazil (Received August 3...unusual TiFe _+Cr_+ Cu mineralization in northeastern Brazil. In: G. Ga~l and K. Schulz (Editors), Precambrian...km west of Recife, including the 20 Mt Riacho da Posse deposit show striking similarities with the Bodoc6...mineral compositions recorded in Bodoc6, lacking plagioclase but rich in rutile; and (3) migmatitic-gneissic |  | | Journal (issue) | | and pyroxene arc Jis tingu1shcd by the former posse sing prismatic ° ° crysr:d and clcal'agc angles...Rocks II Orthoclasc & 'Dominant Orthoclase Plagioclase None I Plagioclasc Feldspar ,_ _ _ _ --' '- ...resumed at t he Kelly M i ne in the Randshurg District. San Bernardino County. This property a few years...Lake, Lake County, has reopened: also the Santa Rosa lcad -:.ilvcr m i ne, Keeler, I nyo Countv. In the |  | | Report (issue) | | crystal weighed 455 kilograms. 2m: The Queen Anne mine in Zimbabwe has produced crystals up to 2 meters...some pegmatites. This specimen, from Minas Gerais, Brazil, is housed in the Deutsches Edelstein Museum in...crystals are found in soils and stream gravels in Brazil. On the other hand, at high temperatures and pressures...near Sabsar, on the Gilgit to Skardu Road, Skardu district, Northern Areas, Pakistan. Collection Ty Lawrence;...and quartz; 15 cm from the Shigar Valley, Skardu district, Northern Areas, Pakistan Because it is associated |  | | Journal (article/letter/editorial) | | DETERMINATeION OF QUARTZ PEGMATITES IN VEINS AND BRAZIL. DJALMA GUIMAR•ES. CRITICAL ASPECTS OF AGE...quartz deposits.in the quartz-producingareas of Brazil. They have found that in the northeasternand m...paper. 100 AGE DETERMINATION OF QUARTZ VEINS IN BRAZIL. 101 This distribution appears to indicate a...Paleozoic is fairly well representedin various parts of Brazil (2). In other words, as Cambro-Silurian formations...hydrothermalalteration. AGE DETERMINATION OF QUARTZ VEINS IN BRAZIL. 103 Dana'sSystemof Mineralogy,1944Edition,stateson |  | | Journal (article/letter/editorial) | | monazites from pegmatites in eastern Minas Gerais, Brazil* K. J. MURATA~, C. V. DUTRA:, M. TEIXEIRA DA...G., Brazil. Instituto de Pesquisas Radioativas, Escola de Engenharia, Belo Horizonte, M.G., Brazil. The...monazitesfrom pegmatitesin easternMinas Gereis,Brazil The data obtained in our study are interpreted...Juiz de Fora Ibitigusia. Ibitiguaia E&v& E&~&J District 2. S&I Bento Orquima 10 km SW of locality ... Mua. No. R-8109. Granite stock Pegmatite Plagioclase pegmatite Pegmrttite Pegmatite Gruta da, Generosa |  | | Book | | BARTORELLI ::• . . .. MINERALS & PRECIOUS STONES OF BRAZIL Sponsored by: VALE MINISTER.IO DA CULTURA ©...Brasileira do Livro, SP, Brazil) Cornejo, Carlos .Minerals & precious stones of Brazil. Carlos Cornejo, Andrea...3. Minerals - Brazil 4. Minerals- Classification 5. Mineralogy 6. Mineralogy - Brazil - History 7. Precious...Precious stones - Brazil I. Bartorelli, Andrea. II. Title. 09-10025 Cover photograph: Crystal of brazilianite...Landmann. CDD-549 Indexes for systematic catalog: 1. Brazil: Minerals and precious stones: Mineralogy and gemology |  | 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) | | State University of Campinas, Brazil University of Brasília, Brazil Natural History Museum – Leibniz...d Federal University of Bahia, Brazil e University of São Paulo, Brazil b c A R T I C LE I N FO A B...Universitária ‘Zeferino Vaz’, Campinas, SP, CEP 13083-855, Brazil. E-mail address: alvaro@ige.unicamp.br (A.P. Crósta)...xxx–xxx A.P. Crósta et al. offshore region of Brazil. Once again, this number of impact structures in...research and meteoritics have been presented in Brazil and Argentina by renowned researchers in the field |  | | Journal (issue) | | manager Famous mineral localities: the Broken Hill mine, Zam bia..............................................351 Famous mineral localities: the Cruzeiro mine, past and present ................................Schoten COVER: ELBAITE on quartz from Minas Gerais, Brazil. The crystal is 8.5 mm in width. Photo by Olaf...Kitwe, Zambia HISTORY The Broken Hill lead-zinc mine is located near the town of Kabwe, 140 km north...carbonates of zinc.” Knowledge of the famous Broken Hill mine in Australia led Davey to name his discovery as |  | | Journal (issue) | | Gressman tom.gressman@minrec.org The Tintic District: Juab and Utah Counties, Utah...................COVER: CLINOCLASE, 3.9 cm, from the Mammoth mine, Tintic District, Utah. Rock Currier collection; Jeff Scovil...holds a sample of a pascoite group mineral at a mine in Grand County, Utah. Died, Alex Earl, 26 Jayson...over the American West. A trip to the Blue Bell mine near Baker, California, in 2016 was particularly...Phurcalite with brochantite, 2-mm view, from the Posey mine, San Juan County, Utah. Alex Earl collection and |  | Toselli, A., Pomposiello, C., Durand, F., Osella, A., De Luchi, M. Lopéz (1999) South American Global Geoscience Transect 7: Cordillera Frontal to Llanura Chaco Pampeana, Northern Argentina. International Geology Review, 41 (2) 154-174 doi:10.1080/00206819909465137 | Journal (article/letter/editorial) | | fault-controlled Sauce Guacho (334 Ma) and Santa Rosa (373 Ma), are considered to be late tectonic and...porphyroclasts have been observed. Ductile deformation of plagioclase involves diffuse, sometimes microfolded, twinning...represented by the Los Ratones pluton in Fiambalá, Santa Rosa, and Sauce Guacho plutons in Ancasti (Figs. 1 and...Pomposiello, M. C , Díaz, M. T., Lopez, N. G., and Posse, H. M., 1989, Determinaciones gravimétricas en las |  | | Report (issue) | | Blue Ridge province _____________ _ Spruce Pine district ____________ Madison County and Haywood County...County _____________________ _ Zirconia district ___________ ----Macon, Jackson, and Clay Counties __ ----...Monazite localities-Continued South America-Continued Brazil-Continued Beach placers _________________________...and Idaho. Most of the world output has come from Brazil, India, and the Republic of South Africa, but 12...beaches and elevated bars along the southern coast of Brazil were the world's main source of commercial monazite |  | | Journal (issue) | | the teresting rocks and minerals. Lake Superior district began in 1848; the Minerals are beautiful in themselves...Ramsay is over 3,500 feet in depth. In a typical mine the processes.s involved are :ts follows: the ore...calcic feldspar (plagioclase) are present. The ratio of ·orthoclase to plagioclase is about 3: 1. The...here we go to the Athens Mine. At the railroad track, due north of the mine shaft, is an outcrop of cherty...iron ore was first found in the Lake Superior .district. To the south of the monument is a diorite outcrop--one |  | | Journal (article/letter/editorial) | | intrusive suites in the Cachoeirinha-Salgueiro belt, NE Brazil: a transition from collisional to post-collisional...Rego, CEP 50739, Cid. Universitaria, Recife, PE, Brazil bDepartment of Geological Sciences, University... belt is located in the Borborema Province, NE Brazil. It has been intruded by several syenitic and granitic...Rego, CEP 50739, Cid. Universitaria, Recife, PE, Brazil. Conceicao type does not crop out in the studied...granitoid plutons and dykes of the Salgneiro area, Brazil Pluton Satgneiro pluton Rock type(s) MAJOR, minor |  | | Journal (article/letter/editorial) | | porphyritic plagioclases with essential olivine, plagioclase, a n d augite in a chloritized mesostasis; the...tholeiite of inner dyke-component (R. 1I27I) with plagioclase phenocryst and varioles, • 7. Note the textural...of the central variole with its integument of plagioclase (labradorite) plates, and the partial disintegration... titanomagnetite; dark greys are silicates (plagioclase, augite, and mesostasis) of the host. The structures...remains circular, v, pyrite unit trapped between plagioclase tablets, with resultant distortion. Note that |  | | Report (issue) | | the tso modified gabbros are those in which plagioclase is transformed into albite or prehnite. The lack...2.7%) and low Mg# (~0.58). Inclusions within plagioclase are armored and unzoned, but others show profound...S) DISTINGUISH SOURCES OF ACID DRAINAGE AT PENN MINE, CALIFORNIA Alpers, C.N. and Hamlin, S.N., U.S....contaminated surface and ground waters at the Penn Mine, Calaveras County, California. Contaminated surface...consists of unmined, mineralized rock in underground mine workings extending to more than 1 km depth. In this |  | | Journal (article/letter/editorial) | | Reproductive traits indicated by MOR 963 show that Troodon posse ssed ple siomorphies shared with crocodilians (some...lesser amounts of feldspar, including zoned plagioclase, biotite, amphibole, chlorite, monoand poly crystalline...volcaniclastic mineral phases such as Ca-rich plagioclase feldspars . Calcium contents of Upper Cretaceous...glass bubbles, chert, biotite, feldspars, zoned plagioclase, and amphibole indicates a nearby volcanic source...Lameta Formation (Upper Cretaceous) of Chandrapur district, Maharashtra, India, and general remarks on the |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Luiz A. D. Menezes: Belo Horizonte, Minas Gerais, Brazil. William C. Metropolis: Mineralogical Museum, Harvard...Wokitecas eel TMPS Tia VER YUC ZAC States, Brazil Acre Alagoas Amapa Amazonas Bahia Ceara Para...Spotsylvania Co., and Partridge mine, Orange Co., VA, and at Dahlonega, GA; Homestake mine, Lawrence Co., SD; Silver...Lake Co., Breckenridge(*), Summit Co., Ground Hog mine(*), Gilman Co., Silverton and Telluride, San Juan...Ledge mine, Nevada Co., Jamestown, Tuolumne Co., Colorado quartz mine, Mariposa Co., Bonanza mine, Trinity |  | | Journal (issue) | | 21. Number 8 COVER PHOTOGRAPHY Jun. 1-2—Rand District Old Timers reunion, Randsburg, California. Jun...directing a man hunt. He would be out there leading the posse in the good old western tradition. Tommy turned...F. L. Ransor.-.e's Geology of the Oatman Gold District, he mentioned filled cavities in the upper flows...to the left to Silver creek, the Moss mine and Katherine district. We continued on the paving and at 2...gold is reported by John J. Carr in the Clarkdale district 20 miles north of here. The strike is on a group |  | | Book | | 4.3 Vila Nova and Serra do Navio belts, Amapa, Brazil 17.4.4 Rio Itapicuru greenstone belt Early Precambrian...magnetite olivine OIB ocean island basalt Fi plagioclase Px Xspinel pyroxene ionic Cr/(Cr + Al) SHMB...cooled lavas commonly contain a few percent of plagioclase and augite microphenocrysts, often with quenched...chromite), (Cr-bearing) augite, augite + plagioclase, augite + plagioclase + Fe-Ti oxide. Some orthopyroxene...One consequence of the late crystallisation of plagioclase is that mg’ values decline rapidly relative to |  | | Journal (article/letter/editorial) | | properties of crystal structures in which cations posse&q similar charges and radii but different electronegativities...E. RXXGWOOD oamouflaged by Nal (O-98 A) in plagioclase, whilst C!uz(0.72 A) is oamouflaged by Fe” (O-74 |
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