 | | Journal (article/letter/editorial) | | minerals Case Report Heavy Mineral Sands in Brazil: Deposits, Characteristics, and Extraction Potential...Cidade Universitária, Rio de Janeiro 21941-908, Brazil; carolinec.gon@gmail.com * Correspondence: pbraga@cetem...March 2019; Published: 13 March 2019 Abstract: In Brazil, heavy mineral sand deposits are still barely exploited...state and in Bahia Provinces. In all samples, the heavy minerals of interest (ilmenite, monazite, rutile,...while the figure for the Bahia sample was 3.4% THM. The recovery test of the Bahia sample, using only physical |  | | Journal (article/letter/editorial) | | Pleistoaene sand in Florida and in a recent one in Brazil. Although they are nonmetallic, they contain nickel...ilmenite (FeTiO,), rutile (TiO,), zircon (ZrSiO,), monazite [(Ce, La, Y, Th)PO,], staurolite [Fe&O,(SiO,)(OH)]...of the tropical and subtropical world, including Brazil, Florida, India and Australia. These concentrates...sea cliff. Fig. 1. Spherules from Cumuruxatiba, Bahia, Brazil. Av. dia., 200 p. 1872 Blwk, magnetio...studied, 1 kg of an ilmenite-monazite sand from the coast of Bahia, Brazil, contained only about 500 mg |  | | Journal (article/letter/editorial) | | 2010 Letter Partial high-grade alteration of monazite using alkali-bearing fluids: Experiment and nature...A. abstraCt Recent advances in the dating of monazite using the electron microprobe indicate that ThSiO4-...CaTh(PO4)2-enriched intergrowths in monazite can give ages younger than the original monazite. The morphology of the...the intergrowths suggests that the original monazite grain has been partly altered by a fluid in which...Pb-bearing monazite-(Ce) and Na2Si2O5+H2O. During the experiment, a subset of the monazite grains acquired |  | | Journal (article/letter/editorial) | | com/loi/tigr20 Geology and Mineral Resources of Brazil: A Review a a Inacio De Medeiros Delgado , Augusto...de Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil b US. Geological Survey, Denver, CO, 80225...Thorman (1994): Geology and Mineral Resources of Brazil: A Review, International Geology Review, 36:6,...rights reserved. Geology and Mineral Resources of Brazil: A Review INACIO DE MEDEIROS DELGADO, AUGUSTO J...de Pesquisa de Recursos Minerals, Scdvador, Bahia, Brazil AND CHARLES H. THORMAN US. Geological Survey |  | | Journal (article/letter/editorial) | | T-Zr placers in five major placer-forming regions (Brazil, India/Sri Lanka, southeastern Africa, southeastern...ilmenite, 100% of the zircon, and at least 50% of the monazite and xenotime (Towner, 1990). The dominant proÂ...To this end, five major placer-forming regions (Brazil, India/Sri Lanka, southeastern Africa, southeastern...major coastal deposits. Titanium mineral-zircon-monazite placers dominate the coasts of eastern and western...southeastern and western Africa, India and Sri Lanka, Brazil, and the southeastern United States. Data from |  | | Journal (article/letter/editorial) | | ORIGINAL PAPER Fluid-mediated partial alteration in monazite: the role of coupled dissolution–reprecipitation...December 2010 Ă“ Springer-Verlag 2010 Abstract Monazite [(Ce,LREE,Th,U,Ca)(P,Si)O4], with complex zoning...Experiments included a relatively homogeneous monazite-(Ce) (7–8 wt% ThO2) from a heavy mineral sand...analysis, and both TEM and HRTEM. A subset of monazite grains from each experiment show evidence of partial...boundaries extending from the grain rim into the monazite interior. These ThSiO4enriched textures are similar |  | Grand'Homme, A., Janots, E., Seydoux-Guillaume, A.M., Guillaume, D., Magnin, V., Hövelmann, J., Höschen, C., Boiron, M.C. (2018) Mass transport and fractionation during monazite alteration by anisotropic replacement. Chemical Geology, 484. 51-68 doi:10.1016/j.chemgeo.2017.10.008 | Journal (article/letter/editorial) | | Manuscript Mass transport and fractionation during monazite alteration by anisotropic replacement A. Grand'Homme...Boiron , Mass transport and fractionation during monazite alteration by anisotropic replacement. The address...MANUSCRIPT Mass transport and fractionation during monazite alteration by anisotropic replacement A. Grand’Homme1...magali.seydoux@univ-st-etienne.fr AC Keywords monazite, anisotropic replacement, experimental alteration...Anisotropic propagation of the reaction front during monazite alteration (<600°C). ď‚· Anisotropic replacement |  | | Report (issue) | | PLURINATIONAL STATE OF BOSNIA AND HERZEGOVINA BOTSWANA BRAZIL BRUNEI DARUSSALAM BULGARIA BURKINA FASO BURUNDI....................................... 38 6.4.3. Brazil..................................................of the mineral monazite, it seems appropriate at least to include information on monazite deposits and...common rare earththorium mineral is phosphate monazite, in which the thorium content can reach up to...the most frequent concentrations of thorium in monazite do not exceed 10%. Other common minerals, however |  | | Book (volume) | | GeocronolĂ©gicas da Universidade de Sao Paulo, Brazil K. Kawashita Instituto de GeociĂ©ncias e Astronomia...Pesquisas GeocronolĂ©gicas da Universidade de Sao Paulo, Brazil H. E. Asmus Petrobras Exploration Division John...Nacional de Pesquisas A.E. M. Nairn Rio de Janeiro, Brazil Department of Earth Sciences University of Leeds...Universidade Federal do Parana Curitiba, Parana, Brazil U. G. Cordani Instituto de GeociĂ©ncias e Astronomia...Pesquisas GeocronolĂ©gicas da Universidade de Sao Paulo, Brazil Ian W. D. Dalziel Lamont-Doherty Geological Columbia |  | | Book | | other margins of the world, including Argentina, Brazil, Japan, Canada, South Africa, Antarctica, Norway...S. A., Caixa Postal 809 XZ-00, Rio de Janeiro, Brazil M. J. Carr, Dartmouth College, Department of Earth...Brasileiro S.A., Caixa Postal 809 XZ-00, Rio de Janeiro, Brazil Lucien Montadert, Institut Francais du Petrole... S.A., Caixa Postal 809 XZ-oo, Rio de Janeiro, Brazil Thomas Pyle, University of South Florida, 830 1st... Recent Sediments and Environments of Southern Brazil, Uruguay, Buenos Aires, and Rio Negro Continental | | | Book | | other margins of the world, including Argentina, Brazil, Japan, Canada, South Africa, Antarctica, Norway...S. A., Caixa Postal 809 XZ-00, Rio de Janeiro, Brazil M. J. Carr, Dartmouth College, Department of Earth...Brasileiro S.A., Caixa Postal 809 XZ-00, Rio de Janeiro, Brazil Lucien Montadert, Institut Francais du Petrole... S.A., Caixa Postal 809 XZ-00, Rio de Janeiro, Brazil Thomas Pyle, University of South Florida, 830 1st... Recent Sediments and Environments of Southern Brazil, Uruguay, Buenos Aires, and Rio Negro Con¬ tinental |
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