REE geochemical constraints on the genesis of synmetamorphic veins in Xingzi group of Lushan, SE China

摘要

Metamorphic fluids, an important type of the ore-forming fluids within the Earth's crust, are the necessary materials for metamorphic hydrothermal ore formation. Their direct products are varieties of synmetamorphic veins occurring in metamorphic rocks. Studies on the genesis of these veins can be available for investigating the source material and formation processes of metamorphic hydrothermal deposit. Previous studies on metamorphic veins have focused mainly on their mineralogical, major elemental and oxygen isotopic compositions, and two different hypotheses have been advanced to account for metamorphic vein genesis. In this paper, we use rare-earth elemental method, together with field geological and petrologic studies, to inquire into the origin of synmetamorphic veins occurring in Xingai Group of Lushan, southeast China.