SHRIMP U-Pb and REE data pertaining to the origins of xenotime in belt supergroup rocks: Evidence for ages of deposition, hydrothermal alteration, and metamorphism
The Belt–Purcell Supergroup, northern Idaho, western Montana, and southern British Columbia, is a thick succession of Mesoproterozoic sedimentary rocks with an age range of about 1470–1400 Ma. Stratigraphic layers within several sedimentary units were sampled to apply the new technique of U–Pb dating of xenotime that sometimes forms as rims on detrital zircon during burial diagenesis; xenotime also can form epitaxial overgrowths on zircon during hydrothermal and metamorphic events. Belt...[Show more]
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|Source:||Canadian Journal of Earth Sciences|
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