Results 31 to 40 of about 1,995 (202)

Development of CCMb: A Low‐Mg Calcite Reference Material for In Situ Measurement of δ18O, δ13C and Selected Trace Elements

Geostandards and Geoanalytical Research, Volume 50, Issue 3, Page 677-700, September 2026.
Key Points Low‐Mg calcite RM developed for in situ microanalysis applications in palaeoclimatology (δ18O, δ13C; Mg, Sr m/m). New data for calcite CRM IAEA‐603 (δ18O, δ13C by SIMS and GS‐IRMS; Mg m/m). No detectable IMF effect of Mg on SIMS δ18O determinations for mass fractions < 3650 μg g‐1.
Andreas T. Hertwig, Maciej G. Śliwiński, Irene Cantarero, Richard A. Stern, Carles Fàbrega, Jakub T. Śliwiński, Thomas Ludwig, František Majs, William Nachlas, John H. Fournelle, Xavier Llovet, Rachelle B. Turnier, David Parcerisa, Anna Travé   +13 more
wiley   +1 more source

Petrologia e Mineralogia - v. 1 [PDF]

, 2018
A produção deste trabalho é independente e surgiu da idéia e colaboração de professores, alunos e ex-alunos do curso de Geologia do Centro de Ciências Exatas, Naturais e da Saúde, da Universidade Federal do Espírito Santo. Estão contidos neste livro 5

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PROJETO DE MONITORIA DE LABORATÓRIO: DISCIPLINA PETROLOGIA ÍGNEA [PDF]

, 2019
O desenvolvimento do trabalho se deu por meio do Programa de Monitoria de Laboratório, edital nº 07/2018 da PROEG/Unifesspa, que envolve atividades de ensino em Laboratórios desenvolvidas pelos alunos de graduação em conjunto com professores responsáveis
dos Santos Coutinho, Fabiane, Alves Medina, Ricardo Augusto   +1 more
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Provenance and Petrological Evolution of Sand Injection Complexes: Insights From Heavy Mineral Analysis in the Paleogene Forearc Succession of the San Joaquin Basin

Basin Research, Volume 38, Issue 3, May–June 2026.
The study of heavy mineral assemblages with statistical analysis resolves provenance signatures and quantifies syn‐emplacement modification of sand injection complexes. Results demonstrate transformative petrological processes, including density‐dependent hydraulic sorting and mechanical grain degradation.
Gustavo Zvirtes, Andrew Morton, Andrew Hurst, Ruy Paulo Philipp, Wiktor Luzinski, Giuseppe Palladino, Luciano Alessandretti   +6 more
wiley   +1 more source

Indagini preliminari su un silicato sintetico a Na e Ca: la combeite [PDF]

, 2006
Riassunto presentato all'85° Congresso Nazionale della SIMP (Società Italiana di Mineralogia e Petrologia), Fluminimaggiore-Antas, 27-30 settembre ...
SILVESTRI, ALBERTA, SALVIULO, GABRIELLA, ZORZI F.   +2 more
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Multiple processes of geochemical evolution for the alkaline rocks of Rio Bonito intrusive complex, Rio de Janeiro State, Brazil: 40Ar/39Ar and U-Pb ages and Lu-Hf isotopes on zircon and constraints on crustal signature

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, Akihisa Motoki , Anderson Costa dos Santos, Julio Mendes, Fred Jourdan, Mauro César Geraldes, Cristiano de Carvalho Lana   +6 more
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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, Amarildo Salina Ruiz, Jefferson Cassu Manzano, Larissa Marques Barbosa de Araújo-Ruiz   +3 more
doaj   +1 more source

Braincase anatomy and palaeoneurology of Venetoraptor gassenae, a lagerpetid pterosauromorph from the Late Triassic of southern Brazil

Palaeontology, Volume 69, Issue 2, 2026.
Abstract There is a growing consensus that pterosaurs and the flightless Lagerpetidae are closely related. This relationship is supported by apomorphies throughout the skeleton, including endocranial character states such as a well‐developed floccular fossa and a tall anterior semicircular canal. Our knowledge of lagerpetid anatomy has been improved by
Lísie V.S. Damke, Leonardo Kerber, Mario Bronzati, Maurício S. Garcia, Martín D. Ezcurra, Sterling J. Nesbitt, Rodrigo T. Müller   +6 more
wiley   +1 more source

MONITORIA DE PETROLOGIA METAMÓRFICA - 80 [PDF]

, 2019
projeto de monitoria da disciplina de Petrologia Metamórfica realizado no período 2018.4. O mesmo atendeu a turma de Geologia 2016, conforme o edital 07/2018 do Programa de Monitoria com Práticas de Laboratório. Durante a execução do projeto os monitores
Assunção, Leon Lee Oliveira, Pinheiro, Ana Valéria, Coutinho, Fabiane dos Santos   +2 more
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Templated Tube Growth About a Reactive Gas Plume: The Pharaoh's Serpent Reaction, Thermodecomposition of Mercury Thiocyanate in Air

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, Sergio Testón‐Martínez, Carlos Gutierrez‐Ariza, C. Ignacio Sainz‐Díaz, Julyan H. E. Cartwright   +4 more
wiley   +1 more source