Genesis and Geological and Geochemical Character- istics of Qixia Gold Deposit, Shandong, China

摘要

The Qixia gold deposit is one of the important quartz vein-type deposits hosted in metamorphic rocks in the east of Shandong, China. Compositionally the wolframite which is associated with gold mineralization in the deposit is rich in iron, but poor in manganese, show- ing that this mineral crystallized from hydrothermal solution at low temperature. The tempera- tures at the main metallogenic stage of the Qxia gold deposit are within the range of 160- 270 deg. C. The gaseous phases in fluid inclusions are dominated by H_2O and CO_2, while Na~+, Ca~2+ and Cl~- are the major species in the fluid phase with K~+ and F~- present in relatively Small amounts. The salinities of fluids are 4.2 wt/100 - 8.0 wt/100 NaCl equiv.