He-Ar isotopic compositions of fluid inclusions trapped in pyrites from some representative PGEpolymetallic deposits in Lower Cambrian black rock series in Sout
The gold orefield studied is located on the south border of the underthrust-collision zone of the Qinling microplate and the North China microplate in the Indos
A new dinosaur of Early Cretaceous age was recently discovered from the Mazongshan area of northwesternGansu Province, China. The new dinosaur represents a new