Results 41 to 50 of about 307,990 (205)

U-Pb zircon SHRIMP data from the Cana Bravalayered complex: new constraints for themafic-ultramafic intrusions of Northern Goiás,Brazil

open access: yesOpen Geosciences, 2015
The Cana Brava Complex is the northernmostand least well known layered intrusion of a discontinuousbelt of mafic-ultramafic massifs within the Brasilia Belt,which also comprises theNiquelândia and Barro Alto complexes.Available geochronological data from
Giovanardi T.   +5 more
doaj   +1 more source

Critical issues of double-metal layer coating on FBG for applications at high temperatures [PDF]

open access: yes, 2019
Use of fiber Bragg gratings (FBGs) to monitor high temperature (HT) applications is of great interest to the research community. Standard commercial FBGs can operate up to 600 ∘ C.
Caponero, M. A.   +6 more
core   +1 more source

Technology for Whom and for What? A Global South View of Tech Diplomacy

open access: yesGlobal Policy, EarlyView.
ABSTRACT International politics is linked to its technical‐social character. Also, technology is socially constructed and thereby not entirely neutral or impartial. A tech‐driven geopolitical landscape has been a defining feature of contemporary world politics.
Eugenio V. Garcia
wiley   +1 more source

A mineral potential mapping approach for supergene nickel deposits in southwestern São Francisco Craton, Brazil

open access: yesBrazilian Journal of Geology
: Southwestern São Francisco Craton makes limit with Brasília thrust-fold belt and involves rocks from Archean to formed during the Brasiliano-Pan Africano Neoproterozoic event, including a mafic-ultramafic belt (Morro do Ferro Greenstone Belt) hosted ...
João Gabriel Motta   +1 more
doaj   +1 more source

Peixe Zircon as a Quality Control Reference Material in U‐Pb Geochronology by LA‐ICP‐MS

open access: yesGeostandards and Geoanalytical Research, EarlyView.
Key Points Peixe#0 zircon was characterised for U‐Pb geochronology using CA‐ID‐TIMS, SIMS and a long‐term LA‐ICP‐MS data set. The consistent results establish Peixe#0 as a reference material for U‐Pb quality control. Trace element heterogeneity requires careful, CL‐guided spot selection.
Margareth Sugano Navarro   +7 more
wiley   +1 more source

Sedimentary fluvial processes at the margin of an eolian sand sea: the example of the Botucatu Formation, Paraná Basin [PDF]

open access: yesBrazilian Journal of Geology
The Upper Jurassic to Lower Cretaceous Botucatu Formation of the Paraná Basin consists primarily of trough cross-bedded eolian sandstone deposited in an intracontinental desert.
Leandro Gustavo da Silva Albino   +4 more
doaj   +1 more source

Avaliação do Impacto Farmacoeconômico do Reaproveitamento de Overfill de Medicamentos Prescritos com Dose Fechada

open access: yesJornal de Assistência Farmacêutica e Farmacoeconomia
Objetivos: Avaliar o impacto farmacoeconômico do reaproveitamento de sobras de frascos de medicamentos prescritos com dose fechada em um ambulatório de oncologia do Distrito Federal.
Lorenna Moreno Araujo   +4 more
doaj   +1 more source

Advancing Water Security in the Tropical and Subtropical Regions: An Integrative Topic Modeling Approach

open access: yesWorld Water Policy, Volume 12, Issue 1, February 2026.
ABSTRACT Water security in tropical regions faces escalating pressures from climate change, land‐use shifts, and population growth. We conducted a bibliometric review of 1146 peer‐reviewed articles (1964–2023) on tropical water security. Latent Dirichlet Allocation identified 13 thematic topics and their evolution. Publications rose sharply after 2012,
Karling Fernanda Schuster   +3 more
wiley   +1 more source

U-Pb SHRIMP and Sm-Nd geochronology of the Silvânia Volcanics and Jurubatuba Granite: juvenile Paleoproterozoic crust in the basement of the Neoproterozoic Brasília Belt, Goiás, central Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2001
U-Pb SHRIMP and Sm-Nd isotopic ages were determined for felsic metavolcanic rocks from the Silvânia Sequence and Jurubatuba Granite in the central part of the Brasília Belt.
FISCHEL DANIELLE P.   +3 more
doaj  

Reconstruction and Comparison of P-T Paths in the Andrelândia Nappe System, Southern Brasília Fold Belt, MG [PDF]

open access: yesGeologia USP. Série Científica, 2010
The Andrelândia Nappe System consists of three main nappes, from bottom to top: the lower Andrelândia nappe, themiddle Liberdade nappe and the upper Três Pontas-Varginha nappe and associated klippen, Pouso Alto, Aiuruoca, Carvalhosand Serra da Natureza ...
Rafael Gonçalves da Motta   +3 more
doaj  

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