Results 31 to 40 of about 438 (161)
Os granitóides brasilianos da faixa de dobramentos Paraguai, MS e MT
Geologia USP. Série Científica, 2007 A Província Granítica Brasiliana do sudeste mato-grossense encontra-se relacionada à evolução do Cinturão Paraguai e pode ser distinta em dois grandes grupos e/ou eventos magmáticos.
Antonio Misson Godoy +3 more
doaj +1 more source
ChemSystemsChem, Volume 8, Issue 1, January 2026.XX XX ABSTRACT The pharaoh's serpent reaction, the thermodecomposition of mercury thiocyanate in air, is a classic chemical demonstration. We analyse and characterize the reaction products, composed of two different phases, graphitic carbon nitride, C3${\rm C} _3$N4${\rm N} _4$, and metacinnabar, HgS.
Carlos Pimentel +4 more
wiley +1 more source
Geologia USP. Série Científica, 2020 This article presents geochemical characteristics of the alkaline rocks of Rio Bonito intrusive complex, State of Rio de Janeiro, Brazil, which is constituted mainly by nepheline syenite. The fractional crystallisation of this magma decreases K2O/(Na2O +
Daniel Adelino da Silva +6 more
doaj
Angewandte Chemie, Volume 137, Issue 48, November 24, 2025.Chemische Gärten sind selbstorganisierte abiotische Strukturen mit „lebensähnlichen” Formen. Hier zeigen wir, dass solche Prozesse auch nach Zugabe konzentrierter Sulfatlösungen zu festen Calciumsalzen ablaufen und sogenannte Gipsgärten ergeben. Die dafür nötigen Bedingungen sind weitgehend kompatibel mit den geochemischen Verhältnissen auf dem frühen ...
Selina Reigl +5 more
wiley +1 more source
PETROLOGIA DO GRUPO SERIDÓ; CURRAIS NOVOS - PARELHAS (RN)
Revista Brasileira de Geociências, 1985 This work deals with the metamorphism of the Serido schists in the region Currais Novos-Parelhas, of the Serido schist belt. The study involved the petrography of the rocks, the chemistry of rocks and selected minerals and the aplication of geothermometers and geobarometers.
THEODOMIRO GAMA JÚNIOR +1 more
openaire +2 more sources
Petrology of Gameleira potassic lamprophyres, São Francisco Craton
Anais da Academia Brasileira de Ciências, 2012 Gameleira lamprophyres are dykes and mafic microgranular enclaves associated with the shoshonitic Gameleira monzonite. This association belongs to the Paleoproterozoic alkaline magmatism from Serrinha nucleus, northeast Brazil.
Jorge Plá Cid +3 more
doaj
Tectonics, Volume 44, Issue 7, July 2025.Abstract Relamination is closely connected to subduction zones. Despite the numerous high‐P metamorphic belts recognized on Earth, relamination remains a poorly documented process. We present a continental subduction zone where the exhuming high‐P rocks became a relaminant under the upper plate.
Rubén Díez Fernández +7 more
wiley +1 more source
Granitoides TTG de Água Azul do Norte (PA): implicações tectônicas para a Província Carajás
Geologia USP. Série Científica, 2018 A crosta TTG de Água Azul do Norte, inserida no contexto geológico da Província Carajás, situada na porção sul do Domínio Carajás (DC), próximo ao limite com o Terreno Granito-Greenstone de Rio Maria, é dominantemente trondhjemítica, mostra forte ...
Marcela da Silva Santos +2 more
doaj +1 more source
Mineralogical Transformations in Granitoids during Heating at Fire-Related Temperatures
Applied Sciences, 2021 Fire is a major decay agent of rocks and can generate immediate catastrophic effects as well as directional and anisotropic damage that affect long-term weathering processes.
Patricia Vazquez +3 more
doaj +1 more source
The Anatomical Record, Volume 308, Issue 3, Page 827-843, March 2025.Abstract Investigating the evolutionary trajectory of synapsid sensory and cephalic systems is pivotal for understanding the emergence and diversification of mammals. Recent studies using CT‐scanning to analyze the rostral foramina and maxillary canals morphology in fossilized specimens of probainognathian cynodonts have contributed to clarifying the ...
Pedro Henrique Morais Fonseca +7 more
wiley +1 more source