Monazite Chemical Dating
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Limitations of chemical dating of monazite - ScienceDirect
PDF Investigation of The Monazite Chemical Dating Technique
Proton microprobe for chemical dating of monazite . . .
(PDF) Chemical dating of monazite-Testing of an analytical . . .
Investigation of the monazite chemical dating technique
PDF Chemical (U-Th-Pb) dating of monazite: Analytical pro . . .
PDF Chemical U-Th-Pb monazite dating and the Proterozoic . . .
PDF Electron microprobe dating of monazite
Analytical Protocol for U-Th-Pb Chemical Dating of . . .
The ο¬rst report on the chemical (Th-U-Pb) monazite age of . . .
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Monazite chemical dating protocol . Based on the above results we have developed a protocol for chemical dating of monazite using our Cameca SX-100 electron probe . A portion of this protocol is executed during analysis and a portion is done as post-processing and each will be discussed in turn . 4 .1 . Analysis protocol
Chemical dating was performed at Virginia Tech using a Cameca SX-50 EMP in which the analytical routines and settings were specifically optimized for monazite geochronology, including correction of analytical peaks for all
3 . . Monazite datingThe applicability of chemical dating is based on the condition that the concentration of primary lead in monazite is neglected (Parrish, 1990) and that after the mineral formation, the system has remained closed with respect to U, Th and Pb .The method has been developed on the basis of electron microprobe analyses by Suzuki and Adachi (1991) .
Chemical dating of monazite using electron microprobe has gained widespread acceptance as a viable tool for quick generation of age-data but in spite of installations of several electron . . .
Chemical dating was performed at Virginia Tech using a Cameca SX-50 EMP in which the analytical routines and settings were specifically optimized for monazite geochronology, including correction of analytical peaks for all major spectral interferences and correction of peak intensities for local background emission .
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Slagstad, T . 2006: Chemical (U-Th-Pb) dating of monazite : Analytical protocol for a LEO 1450VP scanning electron microscope and examples from Rogaland and Finnmark,Norway . Norges geologiske undersΓΈkelse Bulletin 446, 11-18 . Monazite is a common accessory mineral and is a valuable mineral chronometer on account of its relatively high U
F or these reasons in-situ chemical dating of monazite by EPMA is revolutionising the dating of low to medium grade, regional metamorphic rocks . The major disadvantage of EPMA chemical age dating is that the high detection limits on Pb (~100 ppm ) r estrict the application to older events and/or high-Th monazite grains .
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the Th-Pb system, the most important for chemical dating of monazite , is poorly known, despite the fact that the theoretical basis for its interpretation is established (Steiger and Wasserburg, 1966; All~gre, 1967) . Recently, Barth et al . (1994a,b) demonstrated that for allanite it is more stable than the U-Pb
Chemical Th-U-total Pb method of dating monazite by an Electron Probe Micro Analyzer (EPMA) is a well-known technique for constraining chronology of geological events . In this communication, the analytical conditions of monazite dating using SXFive EPMA recently installed at the Department of Geology, Banaras Hindu University is reported . Consistency in the geochronological data of the . . .
Out of the three varieties of granites, chemical dating of monazite from grey granite was carried out at the EPMA Laboratory, Geological Survey of India, NCEGR, Faridabad . Calibrations were carried out at 20 kV and 20 nA . Pb M was measured using Large polyethylene teraphthalate and the peak counting time was 300 s with back-
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Monazite Chemical Dating
