Characteristics and significance of rare earth elements in quartz of Sidaogou hydrothermal gold deposit, Liaoning.

The rare earth elements in quartz and fluid inclusions from the Sidaogou Go ld Deposit, Liaoning were determined by Inductively Coupled Plasma-Mass Spe ctrometry (ICP-MS). The result shows that the REE pattern of quartz is simi lar to that of fluid inclusions. The REE in quartz are concentrated in flui d inclusions, and the REE pattern of the fluid inclusions shapes the REE pa ttern of the quartz in which it occurs. The primary inclusions are affinal to quartz, and the characteristics of REE in them should represent the char acteristics of quartz-forming fluid. Whereas the formation of the secondary inclusions is later than the crystallizing of quartz, and the REE in them will give out the information of late stage hydrothermal solution. Careful examination of fluid inclusion in gold-bearing quartz vein of Sidaogou gold deposit reveals that the primary-pseudo secondary inclusions in quartz vei n are dominant, therefore, the REE parttern of gold-bearing quartz veins re presents the REE pattern of ore-forming fluid of Sidaogou gold deposit.