[PDF] Top 20 REPOSITORIO INSTITUCIONAL DA UFOP: In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup.
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REPOSITORIO INSTITUCIONAL DA UFOP: In situ LA-ICPMS U-Pb dating of detrital zircons from the Cercadinho Formation, Minas Supergroup.
... Formação Cercadinho, uni- dade basal do Grupo Piracicaba, Supergrupo ...Análises U-Pb por Laser Ablation Induced Coupled Mass Spectrometer (LA-ICPMS) em zircões detríticos provenientes ... See full document
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REPOSITORIO INSTITUCIONAL DA UFOP: Supergrupo Minas na Serra de Bom Sucesso, extremo sudoeste do Quadrilátero Ferrífero – MG : petrografia, geoquímica e isótopos de U-Pb.
... iron formation (BIF) hosted Bom Sucesso Metassedimentary Sequence (BSMS) is exposed in the southwest part of the Quadrilátero Ferrífero, Minas ...units: the lower Lagoa da ... See full document
28
REPOSITORIO INSTITUCIONAL DA UFOP: Geochemistry, Nd isotopes and U–Pb geochronology of a 2350 Ma TTG suite, Minas Gerais, Brazil: implications for the crustal evolution of the southern São Francisco craton.
... with the mantle wedge, ...2000). The flat REE tholeiitic source of the Lagoa Dourada suite, as inferred from geochemical modeling, is more con- sistent with melting within a ... See full document
20
REPOSITORIO INSTITUCIONAL DA UFOP: U–Pb ages and Hf-isotope data of detrital zircons from the late Neoarchean-Paleoproterozoic Minas Basin, SE Brazil.
... Because of its world-class iron ore deposits and promising Au and U mineralizations, the late Neoarchean to Paleoproterozoic Minas Basin (Minas Supergroup, SE of Brazil) ... See full document
19
REPOSITORIO INSTITUCIONAL DA UFOP: Unravelling a Proterozoic basin history through detrital zircon geochronology : the case of the Espinhaço Supergroup, Minas Gerais, Brazil.
... In the type locality, the Espinhaço Supergroup is subdivided into two groups and nine formations (Pflug, 1965; Dussin and Dussin, 1995) or (according to a sequence-stratigraphy approach) into ... See full document
7
Zircon ages delimit the provenance of a sand extrudite from the Botucatu Formation in the Paraná volcanic province, Iraí, Brazil
... determinations of 102 detrital zircon crystals from a sand extrudite, Cretaceous Paraná volcanic province, set limits on the origin of the numerous sand layers present in ... See full document
12
Electron microprobe Th-U-Pb monazite dating and metamorphic evolution of the Acaiaca Granulite Complex, Minas Gerais, Brazil
... taken in 1982 by Jordt-Evangelista. Mafic granulites are constituted of orthopyroxene + clinopyroxene + plagio- clase ± ...variation from andesine (An 40 ) to bytownite (An 87 ...to the ... See full document
12
REPEATED PARTIAL MELTING EVENTS IN POLYMETAMORPHIC CARLOS CHAGAS BATHOLITH: IMPLICATIONS FOR TECTONO- METAMORPHIC EVOLUTION OF THE ARAÇUAÍ OROGEN, SOUTHEASTERN BRAZIL
... orogen of southeastern Brazil together with its counterpart located in southwestern Africa, the West Congo belt (Figure ...during the Brasiliano – Pan-African orogeny between the São ... See full document
227
Fabrication of in situ composite layer on cast steel
... describes the technology of fabrication of composite layers in cast steel reinforced with titanium ...carbides. In the process under discussion, the reinforcing TiC phase ... See full document
6
Braz. J. Geol. vol.47 número4
... conirm the tectonic environment distinction between both ...contents of HFSE (Zr, Nb, Y), Ga and Rb, together with lower contents of Ba and Sr ...characteristic of acid magmatism with an ... See full document
16
Proterozoic first-order sedimentary sequences of the São Francisco craton, eastern Brazil
... concept of 1st-order sequence adopted in the present paper was postulated by Martins-Neto et ...lack of time control, an approach based on the stratigraphic hierarchy is considered ... See full document
13
Provenance and age delimitation of Quadrila´tero Ferrı´fero sandstones based on zircon U–Pb isotopes
... confirms the presence of 2.17 Ga old zircon crystals in sandstones from the Itacolomi Group, high in the stratigraphy above the iron formation, as part ... See full document
13
Fácies sedimentares e proveniência da Formação Bebedouro, Neoproterozóico (BA)
... areas of diamictites from the same stratigraphic level of the Neoproterozoic Be- bedouro Formation revealed clear differences of provenance, indicating nearby source ... See full document
30
Protolith age of Santa Maria Chico granulites dated on zircons from an associated amphibolite-facies granodiorite in southernmost Brazil
... U-Pb dating of zircon was undertaken with the Beijing SHRIMP II (sensitive high resolution ion microprobe) on an amphibolite facies granodiorite and an almandine-albite granulite ... See full document
9
The application of optical measurements for the determination of accuracy of gear wheels casts manufactured in the RT/RP process
... preparation of the casting process included heating the mould in 70°C, which caused water to ...Next, the mould parts were joined together and filled with an aluminum ...After ... See full document
4
REPOSITORIO INSTITUCIONAL DA UFOP: Incorporation of residues from the minero-metallurgical industry in the production of clay-lime brick.
... avoids the environmental impacts associated with burning manufacturing processes (Figueiredo, ...reduce the usage of bedding mortar and coatings due to the quality and final appearance ... See full document
6
REPOSITORIO INSTITUCIONAL DA UFOP: Assessing the isotopic evolution of S-type granites of the Carlos Chagas Batholith, SE Brazil : clues from U–Pb, Hf isotopes, Ti geothermometry and trace element composition of zircon.
... to the crystallization ages of the youngest G1 granitoids of the magmatic arc of the Araçuaí ...with the conclusion that the CCB emplacement was ... See full document
21
Optimization of the in-situ U ePb age dating method via LA-Quadrupole-ICP-MS with applications to the timing of U eZreMo mineralization in the Poços de Caldas Alkaline Complex, SE Brazil
... error of the UePb (76 ± 12 Ma to 82 ± 11 Ma) ages produced from thorite ...that the zircon mineralization took place immediately after the emplacement of the volcanic body ... See full document
10
U-Pb Geochronology Zircon (LA-ICP-MS) data of the Gneissic-Migmatitic Complex of Salvador-Esplanada-Boquim Belt, São Francisco Craton, Brazil/Geocronologia U-Pb (LA-ICP-MS) em zircões do Complexo Gnáissico-Migmatítico do Cinturão Salvador-Esplanada-Boquim, Cráton do São Francisco, Brasil
... O Cinturão Salvador-Esplanada-Boquim (CSEB) é considerado um ramo do Cráton do São Francisco, localizado na sua porção nordeste, nos estados brasileiros da Bahia e Sergipe. Neste trabalho foi analisada a geocronologia ... See full document
17
REPOSITORIO INSTITUCIONAL DA UFOP: Estudo de perfis U simples de chapa dobrada submetidos a compressão excêntrica.
... transversal U simples, obtido a partir da conformação a frio de chapa de ...perfil U simples as prescrições de normas e códigos de projeto devem ser melhor ...perfis U simples submetidos a ... See full document
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