Electron Microprobe Dating Of Monazite

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Electron microprobe dating of monazite - ScienceDirect
Electron-microprobe dating of monazite: The story . . .
Electron Microprobe Dating of Monazite - New Mexico Bureau . . .
PDF Electron microprobe dating of monazite from the Chittikara . . .
Electron Microprobe (EMP) Dating on Monazite from . . .
Electron Probe Microanalysis of Monazite and Its . . .
Electron-microprobe monazite dating of ca . 1 .71-1 .63 Ga . . .
Age mapping and dating of monazite on the electron . . .
PDF Electron Microprobe (EMP) Dating on Monazite from . . .
PDF Electron microprobe petrochronology of monazite-bearing . . .
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The precision in electron probe dating of monazite is less than by isotopic dating . On a single measure- ment, it varies from _+ 30 Ma lot a Th- and U-rich monazite with 300 s counting time to _+ 100 Ma for an average monazite with 30 s .
This paper is a testimony of how electron microprobe dating of monazite was developed in the early days of this technique, in the 90's . Five contributions have been collected from Nagoya, Clermont-Ferrand, Orléans, Salzburg, and Amherst . The technique was designed in Nagoya by Professor Suzuki, using an old JXA-5A JEOL electron microprobe .
Electron Microprobe Dating of Monazite . We are a research and service division of : Preliminary results of a workshop at NMT given by Michael J . Jercinovic (University of Massachusetts) Method Overview . Assumption: No non-radiogenic lead in monazite or at least very little .
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Electron microprobe dating of monazite from the Chittikara granulite, South India: evidence for polymetamorphic events R . S . Bindu1 M . Yoshidal and M . Santosh2 1 . Department of Geosciences, Faculty of Science, Osaka City University, Osaka . 558, Japan 2 . Centre for Earth Science Studies, PB 7250, Akkulam, Thuruvikkal Post, Trivandrum 695031, India . Abstract
Electron microprobe (EMP) dating on monazite in granulite-facies rocks from Forefinger Point, East Antarctica, yielded dominant ages of ∼500 Ma on matrix monazites . They are associated with secondary cordierite, biotite and sapphirine, formed during nearly isothermal decompression after the high P-T assemblages involving garnet, orthopyroxene and sillimanite .
Electron probe microanalysis (EPMA) dating of monazite has been developed over decades . However, limited by the detectability and analytical sensitivity of dating -related elements (Th, Pb, U and Y), the EPMA dating has been restricted to geological research . In this study, various probe currents, beam diameters and counting times have been utilized . . .
Electron-microprobe monazite dating of ca . 1 .71-1 .63 Ga and ca . 1 .45-1 .38 Ga deformation in the Homestake shear zone, Colorado: Origin and early evolution of a persistent intracontinental tectonic zone
High-resolution X-ray mapping and dating of monazite on the electron microprobe are powerful geochronological tools for structural, metamorphic, and tectonic analysis . X-ray maps commonly show complex Th, U, and Pb zoning that reflects monazite growth and overgrowth events .
Electron microprobe (EMP) dating on monazite in granulite-facies rocks from Forefinger Point,East Antarctica, yielded dominant ages of ~500 Ma on matrix monazites .They are associated with secondary cordierite, biotite and sapphirine, formed during nearly isothermal decompression after the
Monazite dating in metapelites is an emerging method to investigate polymetamorphic areas . A protocol for Th-U-Pb dating of monazite by electron microprobe was adopted for a JEOL JXA-8530F . It was applied to the Variscan and Early-Alpine metamorphic Austroalpine Oetztal-Stubai Complex (OSC) . In the Alpeiner Valley in the Stubai region, the
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Electron Microprobe Dating Of Monazite