Results 31 to 40 of about 3,041 (205)
Литосфера, 2017 The deposits and displays ore of gold in the Mezozoic potash alkaline massifs Aldanskiy shield was the research objects. There are Rybinovoe and Novoe gold deposit in the Rybinovskiy alkaline complex and displays of gold in the Yakokutskiy, Yllymakhskiy,
Gennadii P. Dvornik
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Energy related studies utilizing microcline thermochronology [PDF]
, 1989 Using Microcline Thermochronology (MTC), we have investigated the hydrothermal maturity of the Salton Sea Geothermal Field, potential or hydrocarbon maturation associated with heating due to ridge subduction beneath accretionary prism sediments ...
Harrison, T.M.
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, 2023 The formation of ice in the atmosphere affects precipitation and cloud properties, and plays a key role in the climate of our planet. Although ice can form directly from liquid water at deeply supercooled conditions, the presence of foreign particles can
Piaggi, Pablo M. +9 more
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Antarctic Record, 1974 The K-Ar age determination on micas from the metamorphic rocks and granites in the Ongul Islands and Lang Hovde areas gave the following results: Metabasites 463, 467, 515, 517, 533 and 539 m.y. Biotite gneiss 560 m.y.
Keizo YANAI, Yoshio UEDA
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Monitoring zeolite NaY formation from potassium-rich Nigerian kaolinite clay
Ain Shams Engineering Journal, 2018 This work focuses on the successful synthesis of NaY zeolite from highly contaminated kaolinite clay, while investigating the effect of metakaolinization temperature and aging on role of potassium in zeolitization.
O.A. Ajayi +2 more
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Geological Journal, EarlyView.Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos +6 more
wiley +1 more source
Archaeometry, EarlyView.Abstract Soils that contain swelling clay minerals (e.g., montmorillonite) expand and contract during wetting and drying, causing movement within the soil profile. This process, known as argilliturbation, can alter artefact distributions, destroy stratigraphy and complicate the interpretation of archaeological deposits.
Caroline Mather +11 more
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PETROGRAFIA E LITOQUÍMICA DO MAGMATISMO TARDI-OROGÊNICO TOLEÍTICO ALTO-K E DA SUÍTE PÓS-COLISIONAL ALCALINA SATURADA EM SÍLICA DE GOUVEIA (MG) [PDF]
Geochimica Brasiliensis, 2015 Close to Gouveia town (MG) and located inside granitoids and gneiss of the Gouveia Complex, porphyritic latites (or trachy-andesites) slightly metamorphosed are identified, with plagioclase and sanidine phenocrysts and matrix also feldspar-rich ...
Alexandre de Oliveira Chaves +5 more
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Archaeometry, EarlyView.ABSTRACT This study shows an innovative approach to determine the origin of some Calabrian rocks quarried used in ancient times. Twenty‐five quarries, distributed in all the Calabrian provinces (Southern Italy), were studied and sampled. Ten samples were taken from each quarry, for a total of 250 samples.
Domenico Miriello +5 more
wiley +1 more source
Archaeometry, EarlyView.ABSTRACT This study presents a systematically integrated, multiproxy characterisation of Iron Age ceramics from Tyre (Lebanon). Ninety‐nine ceramic samples from stratified Iron Age contexts on Tyre's Acropolis, together with a small Late Bronze Age and raw‐clay reference set, were analysed using petrography, microfossil identification, X‐ray ...
Francisco J. Núñez Calvo +5 more
wiley +1 more source