Proton microprobe for chemical dating of monazite

BINGEN B., DEMAIFFE D., HERTOGEN J., 1996: Redistribution of rare earth elements, thorium, and uranium over accessory minerals in the course of amphibolite to granulite facies metamorphism: the role of apatite and monazite in orthogneisses from southwestern Norway.

KAUR P., CHAUDHRI N., BIJU-SEKHAR S., YOKOYAMA K., 2006: Electron probe micro analyser chemical zircon ages of the Khetri granitoids, Rajasthan, India: Records of widespread late palaeoproterozoic extension-related magmatism.

Crystals typically contain distinct chemical domains, each of which represent successive growth thru geologic history.

Electron microprobe analysis can characterize the geometry and U-Th- total Pb age for each domain.

) is a radiogenic, rare-earth bearing mineral commonly used for geochronology. L., FREI R., 2005: Comparative isotopic and chemical geochronometry of monazite, with implications for U-Th-Pb dating by electron microprobe; an example from metamorphic rocks of the eastern Wyoming Craton (U. A.) DE LA ROCHE H., LETERRIER J., GRANDE CLAUDE P., MARCHAL M., 1980: A classification of volcanic and plutonic rocks using R1 and R2 diagrams and major element analyses: Its relationship to and current nomenclature.

Here we examine the control of major element chemistry in influencing the crystallization of monazite in granites (Salihli and Turgutlu bodies) and garnet-bearing metamorphic assemblages (Bozdag and Bayindir nappes) from the Menderes Massif, western Turkey. FINGER F., BROSKA I., HAUNSCHMID B., HRASKO L., KOHUT M., KRENN E., PETRIK I., RIEGLER G., UHER P., 2003: Electron-microprobe dating of monazites from Western Carpathian basement granitoids: plutonic evidence for an important Permian rifting event subsequent to Variscan crustal anatexis. A., KERRICH R., 2006: A trace element and chemical Th-U total Pb dating study in the lower Belt-Purcell Supergroup, Western North America: Provenance and diagenetic implications. F., 1974: Unusual lavas from Molokai, Hawaii; alkalic olivine basalts transitional to hawaiites and strontium-richmugearites.

C., KANISAWA S., 2004: Two subgroups of A-type granites in the coastal area of Zhejiang and Fujian Provinces, SE China: age and geochemical constraints on their petrogenesis. S., TAMASHIRO I., KOSHIMOTO S., TSUTSUMI Y., YOKOYAMA K., 2006: The timing of ultrahigh-temperature metamorphism in Southern India: U-Th-Pb electron microprobe ages from zircon and monazite in sapphirine-bearing granulites.

D., 2006: In situ SHRIMP U-Pb dating of monazite integrated with petrology and textures: Does bulk composition control whether monazite forms in low-Ca pelitic rocks during amphibolite facies metamorphism? RING U., BUCHWALDT R., GESSNER K., 2004: Pb/Pb dating of garnet from the Anatolide belt in western Turkey: Regional implications and speculations on the role Anatolia played during the amalgamation of Gondwana.

L., 1995: The peralkaline granite-related Khaldzan-Buregtey rare metal (Zr, Nb, REE) deposit, western Mongolia. KRENN E., FINGER F., 2007: Formation of monazite and rhabdophane at the expense of allanite during Alpine low temperature retrogression of metapelitic basement rocks from Crete, Greece: Microprobe data and geochronological implications. L., KUSIAK M., VOGT J., HAJDUK R., POLAK W., POTEMPA A., STACHURA Z., STYCZEN J., 2003.

Pollard, (ed), A special issue devoted to the geology of rare metal deposits.

L., 2005: Analytical perils (and progress) in electron microprobe trace element analysis applied to geochronology; background acquisition, interferences, and beam irradiation effects.

M., 1993: Monazite paragenesis and U-Pb systematics in rocks of the eastern Mojave Desert, California, U.

Th, Y and Ca values are comparable to EPMA results.

You must have an account to comment. Please register or login here!