Geochemistry
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Idioma 1525-2027
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GEOCHEMISTRY AND GEOCHRONOLOGY OF SURFICIAL ACRE BASIN SEDIMENTS (WESTERN AMAZONIA): KEY INFORMATION FOR CLIMATE RECONSTRUCTION.
Article
Article
Geochemical and geochronological analyses of samples of surficial Acre Basin sediments and fossils indicate an extensive fluvial-lacustrine system, occupying this region, desiccated slowly during the last glacial cycle (...
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Open AccessGeochemistry of eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey
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Article
Subjects / keywords: Andesites; Andesite; Geology; Geochemistry; Basalt; Volcanic rock; Olivine; Magma; Volcano
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Página del recursoGeochemistry, Geophysics, Geosystems
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Article
Subjects / keywords: geochemistry, geophysics, geosystems, physics, chemistry; Science: Physics: Geophysics. Cosmic physics; Science: Geology
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Open AccessEfeitos da ação antrópica sobre a hidrogeoquímica do rio Negro na orla de Manaus/AM The human action effects on the hydrogeochemistry of Negro river at the Manaus shoreline
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Article
O rio Negro, na orla de Manaus, recebe de seus tributários urbanos resíduos domésticos e industriais, cuja composição variada vem modificando as características naturais de suas águas. Com o intuito de avaliar o e...
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Open AccessFluid geochemistry of a deep-seated geothermal resource in the Puna plateau (Jujuy Province, Argentina)
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Article
his study focused on the geochemical and isotopic features of thermal fluids discharged from five zones located in the high altitude Puna plateau (Jujuy Province between S 22°20′–23°20′ and W 66°–67°), i.e. G...
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Open AccessPetrography, geochemistry and geochronology of San Jorge porphyry Cu-Au deposit, Mendoza, Argentina: Constraints for the timing of magmatism and associated mineralization
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Article
The San Jorge porphyry Cu-Au deposit, Argentina, integrates the Paleozoic to Early Jurassic metallogenic belt recognized in the Southern Andes. San Jorge is currently the only deposit considered economically viable due t...
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Material complementarioPRINCIPLES OF GEOCHEMISTRY/
Book
RATIO CORRELATION : A MANUAL FOR STUDENTS OF PETROLOGY AND GEOCHEMISTRY/
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Book
Subjects / keywords: CHAYES, FELIX; THE UNIVERSITY OF CHICAGO PRESS; 552 CH433r
Antarctic ozone hole modifies iodine geochemistry on the Antarctic Plateau
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Article
Polar stratospheric ozone has decreased since the 1970s due to anthropogenic emissions of chlorofluorocarbons and halons, resulting in the formation of an ozone hole over Antarctica. The effects of the ozone hole and the...
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Open AccessFrontiers in Geochemistry
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Subjects / keywords: Science: Geology; Science: Chemistry
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Open AccessGeoquímica de rios de água preta do sudeste do Amazonas: origem, fluxo dos elementos e consumo de CO2 Geochemistry of black water rivers from the southeastern of the Amazonas State: source, element fluxes and consumption of CO2
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Article
Neste trabalho foi examinada a composição química das águas dos afluentes da margem direita do rio Madeira que drenam as rochas do Escudo Brasileiro. O estudo foi realizado no município de Apuí no sudeste do estado...
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Open AccessMineralogia e geoquímica dos perfis sobre sedimentos neógenos e quaternários da bacia do Solimões na região de Coari - AM Mineralogy and geochemistry of neogene and quaternary sediment profiles from the Solimões basin in the region of Coari, Amazonas
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Article
O estudo do intemperismo das rochas é uma ferramenta indispensável para entender a evoluç��o paleoambiental do Cenozóico na Amazônia. Com esse objetivo foram estudados seis perfis intempéricos desenvolvidos a p...
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Open AccessFrontiers in Geochemistry
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Article
Subjects / keywords: medical bacteriology, medical virology, clinical microbiology; Science: Geology; Science: Chemistry
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Open AccessAvaliação de risco ambiental por contaminação metálica e material orgânico em sedimentos da bacia do Rio Aurá, Região Metropolitana de Belém - PA Evaluation of environmental risk by metallic contamination and organic compounds in sediments of the Aurá River basin, Belém, Pará - Brazil
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Article
A bacia do Rio Aurá está situada na região metropolitana de Belém, entre os municípios de Belém e Ananindeua, onde a taxa populacional tem aumentado sem qualquer medida de controle social ou ambiental. A região é...
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Open AccessDecoding depositional and diagenetic conditions of the mid-Cenozoic Puesto del Museo Formation, southern Golfo San Jorge Basin, Patagonia, Argentina
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Article
This paper describes an integrated field, petrographic and geochemical study of the Puesto del Museo Formation, a poorly known unit that evidences a Cenozoic transgression at the southernmost Golfo San Jorge Basin. The m...
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Material complementarioMagmatic evolution and architecture of an arc-related, rhyolitic caldera complex: The late Pleistocene to Holocene Cerro Blanco volcanic complex, southern Puna, Argentina
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Article
Through the lens of bulk-rock and matrix glass geochemistry, we investigated the magmatic evolution and pre-eruptive architecture of the siliceous magma complex beneath the Cerro Blanco volcanic complex, a Crater Laketyp...
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Material complementarioA Holocene tephra layer within coastal aeolian deposits north of Caleta Olivia (Santa Cruz Province, Argentina)
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In this paper we illustrate the stratigraphy, geochronology, and geochemistry (major, minor, trace elements and Sr-isotopes) of a Holocene tephra layer found within coastal sedimentary deposits north of Caleta Olivia (Sa...
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Material complementarioAnatectic granites of the Sierras Pampeanas from Córdoba (Argentina): U-Pb SHRIMP and zircon trace element LA-ICP-MS study of diachronic metamorphism and crystallization
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En este trabajo se aportan nuevos datos de edades U-Pb SHRIMP y análisis in situ LA-ICP-MS de elementos traza de circones provenientes del granito Río de los Sauces, Córdoba, Argentina. A partir de marcadas diferencia...
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Material complementarioAstronomical calibration of the middle Cambrian in Baltica: global carbon cycle synchronization and climate dynamics
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Article
Abstract The Alum Shale Formation of Baltica preserves one of the most continuous and fossil-rich records for the Cambrian Period. Thus, the Alum Shale is a key sedimentary archive for refining global chronostratigraphy,...
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Material complementarioLate Glacial to Holocene environmental development near an oil-producing platform in the Danish North Sea
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Article
The Late Quaternary North Sea basin represents a highly dynamic shelf system, altered by glaciations, deglaciations, and the recent Early Holocene marine transgression. However, detailed studies on the timing of the mari...
LCC TENDOlNjaWVuY2U~Idioma English
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Material complementarioLate Quaternary nearshore molluscan patterns from Patagonia: Windows to southern southwestern Atlantic-Southern Ocean palaeoclimate and biodiversity changes?
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Article
Varied approaches (palaeobiodiversity, palaeobiogeography, bioerosion, geochemistry) to unique Patagonian late Quaternary molluscan assemblages in the southwestern Atlantic, with ages especially from interglacial Marine ...
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Material complementarioNew insights into pyrite in the Western Mecsek uranium ore deposit: its morphology, invisible gold and trace element composition
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This study presents the occurrence of invisible gold and associated trace elements in pyrite from the Late Permian Kővágószőlős Sandstone Formation within the Western Mecsek uranium ore deposit, Hungary. Eight pyrit...
LCC TENDOk1pbmVyYWxvZ3k~Idioma English
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Open AccessPervasive contamination of the remote open ocean with anthropogenic zinc
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Article
Abstract Anthropogenic emissions may drive the isotopically light zinc that pervades the low-latitude upper ocean, but major gaps in our understanding of oceanic zinc cycling have hindered the unequivocal detection of an...
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Open Access