The effect of natural weathering on the chemical and isotopic compositions of biotites

@inproceedings{Clauer1982TheEO,
  title={The effect of natural weathering on the chemical and isotopic compositions of biotites},
  author={Norbert Clauer and James R. O'neil and Chantal Bonnot-Courtois},
  year={1982}
}
Abstract The effect of progressive natural weathering on the isotopic (Rb-Sr, K-Ar, δD, δ 18 O ) and chemical (REE, H 2 O + ) compositions of biotite has been studied on a suite of migmatitic biotites from the Chad Republic. During the early stages of weathering the Rb-Sr system is strongly affected, the hydrogen and oxygen isotope compositions change markedly, the minerals are depleted in light REE, the water content increases by a factor of two, and the K-Ar system is relatively little… CONTINUE READING