Results 11 to 20 of about 1,995 (202)

Elementi di petrologia sperimentale [PDF]

open access: yes
This volume is focused on the fundamentals of experimental petrology, aiming to facilitate the understanding of the dynamics, formation, and evolution of planet Earth and rocky planets. The study is primarily based on the author’s experience in the fields of petrology and volcanology, with the purpose of introducing university and PhD students in Earth
Vetere, Francesco Pasqualino
openaire   +6 more sources

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

open access: yesGeochemistry, Geophysics, Geosystems
A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process.
Oriol Vilanova‐Pagès   +10 more
doaj   +2 more sources

Enhancing Nitrate Removal With Industrial Wine Residue: Insights From Laboratory Batch and Column Experiments Using Chemical, Isotopic and Numerical Modeling Tools

open access: yesWater Resources Research
Agricultural run‐off exposes recipient water bodies to nitrate (NO3−) pollution. Biological denitrification is a suitable method for removing NO3− in water resources that can be induced by the use of industrial organic liquid waste as an electron donor ...
Alex Abu   +7 more
doaj   +2 more sources

Troubles With Tubules: How Do Iron-Mineral Chemical Gardens Differ From Iron-Mineralized Sheaths of Iron Oxidizing Bacteria? [PDF]

open access: yesGeobiology
ABSTRACT Microscopic tubules and filaments composed of iron minerals occur in various rock types of all ages. Although typically lacking carbonaceous matter, many are reasonably interpreted as the remains of filamentous microorganisms coated with crystalline iron oxyhydroxides. Iron‐oxidizing bacteria (IOB) acquire such a coating naturally during life.
Podbielski M   +8 more
europepmc   +2 more sources

Examples of tetrad effect in lanthanides in natural systems [PDF]

open access: yesGeologia USP. Série Científica, 2014
The irregular patterns of rare earth elements, caused by the tetrad effect are revised and discussed in this work, covering its concept and subdivision into M and W types, quantification and the mechanisms that led to its occurrence in magmatic ...
Lauro Valentim Stoll Nardi   +2 more
doaj   +1 more source

O uso de pseudosseções em Petrologia Metamórfica: conceitos básicos e aplicações, com ênfase em pelitos

open access: yesGeologia USP. Série Científica, 2022
O uso de pseudosseções em trabalhos voltados para Petrologia Metamórfica tem se tornado cada vez mais comum nos últimos 20 anos em razão de uma série de fatores, entre eles o avanço das técnicas de análise química mineral usando microssonda eletrônica e
Rafaela Machado Gengo   +3 more
doaj  

Alteração experimental de rochas - A contribuição do Instituto Superior Técnico

open access: yesGeotecnia, 1986
Faz-se uma resenha dos trabalhos de alteração experimental de rochas rotinadas no Laboratório de Mineralogia e Petrologia do I.S.T.: ensaio com extractor de Soxhlet, ensaio de percolação forçada, ensaio de percolação livre em circuito fechado, ensaios ...
A. Mouraz Miranda
doaj   +1 more source

Gypsum Gardens: Self-Assembled Tubular Structures of Calcium Sulfate with Relevance for the Detection of Extraterrestrial Life. [PDF]

open access: yesAngew Chem Int Ed Engl
Chemical gardens are self‐assembled architectures with “life‐like” morphologies that form in the absence of any biological activity. Here we show that such structures can also be obtained by contacting reservoirs of calcium and sulfate ions, under conditions that plausibly emulate those prevailing on early Mars.
Reigl S   +5 more
europepmc   +2 more sources

Absorção e fracionamento dos elementos terras raras por vegetais: estudo comparativo em plantas ocorrentes em diferentes contextos geológicos

open access: yesGeologia USP. Série Científica, 2010
Neste trabalho busca-se analisar o padrão de distribuição dos Elementos Terras Raras presentes nos vegetais, em relação ao padrão desses elementos no substrato, independente das especificidades metabólicas e fisiológicas de cada tipo de planta e da ...
Maria do Carmo Lima e Cunha   +2 more
doaj   +1 more source

Petrologia e idade do Stock Fazenda Lagoas, Domínio Macururé, Sistema Orogênico Sergipano, NE-Brasil

open access: yesGeologia USP. Série Científica, 2020
O Stock Fazenda Lagoas (SFL), com 20 km2, tem idade de cristalização de 623 ± 4 Ma e é intrusivo nas rochas metassedimentares do Domínio Macururé (DM). O seu contato ao norte é afetado pela Zona de Cisalhamento Belo Monte-Jeremoabo (ZCBMJ), que imprime ...
Diego Melo Fernandes   +3 more
doaj   +1 more source

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