Results 31 to 40 of about 3,078 (99)
Литосфера, 2020 Research subject and methods. The work is based on a comparative study of the data obtained by the authors and those published in literature on U-Pb ID-TIMS and “in-situ” isotopic examination of zircons extracted from a number of Ural geological objects (
Yu. L. Ronkin, A. V. Maslov, S. Sindern
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Frontiers in Earth Science, 2023 To reveal the genesis of Makeng-style iron polymetallic deposits from SE China in the paleo-Pacific tectonic domain, a new analytical method of LA-ICPMS garnet U-Pb dating and rare Earth element analysis was conducted for the Makeng, Luoyang, Dapai and ...
Sen Wang +13 more
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Cadernos de Saúde Pública, 2008 O objetivo deste trabalho foi verificar se há correlação estatisticamente significativa entre as concentrações de chumbo no sangue (Pb-S) e urina (Pb-U).
Maria de Fátima Ramos Moreira +1 more
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Yankuang ceshi, 2022 BACKGROUND The Changjiang uranium ore field in the southern margin of the Zhuguangshan complex pluton is a typical granite-type uranium ore field in China. Zircon U-Pb dating has been used to date ore-bearing granites. However, due to the high content of
CHEN Yan +6 more
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Impact and Correction of Analytical Positioning on Accuracy of Zircon U-Pb Dating by SIMS
Frontiers in Chemistry, 2020 Secondary ion mass spectrometry (SIMS) is one of the most important analytical tools for geochronology, especially for zircon U-Pb dating. Due to its advantages in spatial resolution and analytical precision, SIMS is the preferred option for multi-spot ...
Yu Liu +13 more
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Yankuang ceshiApatite is a widespread U-bearing mineral in igneous, metamorphic, and sedimentary rocks. U-Pb geochronology of apatite can provide significant information for constraining magmatic evolution processes and tracing provenance.
Tao LUO +4 more
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Geological structure of the Pre-jurassic basement of the Yugansk-Koltogorsk zone of the West Siberia
Литосфера, 2018 Subject of the study. We have carried out an additional exploration on petrography, petrochemistry, geochemistry, geochronology and biostratigraphy of rock complexes of the Yugansk-Koltogorsk (central part of West Siberia). Materials and methods.
Kirill S. Ivanov +4 more
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Correlated errors in U-Pb geochronology.
GEOCHEMICAL JOURNAL, 1979 Formulae are derived for the correlation of errors in the most used lead-lead and uranium-lead diagrams. It is emphasized that with the usual measurement schemes, error correlation is high in the conventional diagrams. An inverse lead-lead diagram is described in which, by proper choice of the measurement scheme, there is no correlation between errors.
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Geocronología isotópica de rocas graníticas de la Zona Centro-Ibérica: comparación de metodologías
Estudios Geologicos, 2010 En el plutón de Castelo Branco, se distinguen cinco granitoides, dispuestos concéntricamente de núcleo a borde del plutón. Las edades U-Pb-Th obtenidas en cristales de monacita por microsonda electrónica en estos granitoides son similares entre sí y ...
I. M.H.R. Antunes +2 more
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Изотопная геология древнейших образований Южного Урала
Литосфера, 2019 С помощью современных методов изотопной геологии в сочетании с петрологическими и структурными исследованиями изучены древнейшие полиметаморфические комплексы Южного Урала - Тараташский и Александровский, являющиеся уникальными объектами, в летописи ...
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