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Chemical mapping and in situ U–Th–Pb analyses reveal a link between age domains and zones of relative yttrium (Y) depletion or enrichment within monazite crystals and are correlated with metamorphic reactions involving garnet. Conventional, small-fraction isotope dilution thermal ionization mass spectrometry (ID-TIMS) and sensitive high-resolution ion microprobe (SHRIMP) techniques were utilized to...
The mineral assemblages in a vertical weathering profile developed over a meta-gabbro terrain were studied for their stoichiometry and relative abundances. The site is located in the Piedmont Province in the southeast portion of the Appalachians orogenic belt in a forested residual landscape and a temperate climate. The soil is classified as a fine mixed thermic Ultic Hapludalf and defined by distinct...
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