Results 11 to 20 of about 3,078 (99)
Exploring the CAM18 Crystal as a Potential Reference Material for U–Pb Analysis of Zircon
Crystals, 2023 In the process of in situ zircon U–Pb dating, it is an effective means to overcome the matrix effect by using a matrix-matched external reference material.
Wurui Li +4 more
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Apatite: a U-Pb thermochronometer or geochronometer?
Lithos, 2018 Abstract Apatite is an accessory mineral that is frequently found in both igneous and clastic sedimentary rocks. It is conventionally considered to be characterized by a closure temperature range between 375 and 600 °C and hence has been employed to address mid-temperature thermochronology questions relevant to the reconstruction of thermal events in
Kirkland, C. L. +6 more
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Adjustment of small-span masonry arch bridges to present-day demands
Građevinar, 2014 An overview of deterioration mechanisms and damage to masonry arch bridges, methods for inspection of existing structures, and conservative and sophisticated assessment methods, is presented in this paper.
Alex Kindij +2 more
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Boletín de Ciencias de la Tierra, 2023 El Complejo Migmatítico de la Cocha-Río Téllez está localizado en el flanco oriental de los Andes Colombianos, entre los departamentos de Nariño y Putumayo. Aflora a manera de ventanas entre depósitos volcánicos y fluvio-volcánicos recientes.
Gabriel Rodríguez-García +1 more
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Modeling apparent Pb loss in zircon U–Pb geochronology [PDF]
GeochronologyThe loss of radiogenic Pb from zircon is known to be a major factor that can cause inaccuracy in the U–Pb geochronological system; hence, there is a need to better characterize the distribution of Pb loss in natural samples.
G. R. Sharman, M. A. Malkowski
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Yankuang ceshi, 2022 BACKGROUND Despite zircon U-Pb dating analysis by LA-ICP-MS receiving wide acceptance, it remains a challenge to obtain results with high accuracy and precision.
TAN Xijuan +4 more
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Detrital zircon geochronology of Paleoproterozoic metasedimentary rocks from Jämsä, Central Finland [PDF]
Bulletin of the Geological Society of FinlandIn this short communication, we present new detrital single grain zircon U-Pb data for six metasedimentary rock samples from Jämsä, Central Finland.
Perttu Mikkola +2 more
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NanoSIMS and EPMA dating of lunar zirconolite
Progress in Earth and Planetary Science, 2021 Zirconolite is a common Zr-rich accessary mineral in mafic rocks. It is also an ideal U–Pb/Pb–Pb chronometer because it commonly contains high U content (mostly 0.1–10 wt%) and negligible initial Pb.
Nian Wang +4 more
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A Review of Research Progress on the Analytical Method of Large-n Detrital Zircon U-Pb Geochronology
Yankuang ceshi, 2022 BACKGROUND Detrital zircon U-Pb geochronology is an important tool for identifying sedimentary provenance and determining the maximum depositional age. The numbers of grains for detrital zircon provenance investigations using laser-ablation inductively ...
CHEN Xiyun +4 more
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Petrology and geochemistry of a U and Th enriched nephelinite from Mt. Nyiragongo, Zaire: Its bearing on ancient mantle metasomatism [PDF]
Bulletin of the Geological Society of Finland, 1985 Unusual large Pb isotope variations found by Vollmer and Norry (1983 a) in nephelinites from Nyiragongo and related volcanoes date a 500 Myr old U(Th)/Pb fractionation.
R. Vollmer, P.H. Nixon, E. Condliffe
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