Abstract:Hougezhuang gold deposit is located in Huluxian goldfield in PenglaiQixia gold belt in Jiaodong Peninsula. It is a typical quartz vein type gold deposit. The ore bodies are mainly vein like and lenticular distributed in the faults within Mesozoic Guojialing granite. The metallogenic stages of Hougezhuang gold deposit are divided into four stages based on the field, microscopic observations, fluid inclusion microthermometry and Raman spectroscopy analysis, they are Pyritequartz stage (Ⅰ), goldquartzpyrite stage (Ⅱ), goldpolymetallic sulfide stage (Ⅲ) and quartzcarbonate stage (Ⅳ). The fluid inclusions are mainly divided into three categories, they are singlephase inclusions (type Ⅰ), gasliquid twophase inclusions (type Ⅱ) and threephase inclusions containing CO2 (type III). The singlephase inclusions are further divided into pure liquid inclusions (type Ⅰa) and pure vapor inclusions (type Ⅰb). The homogeneous temperature of fluid inclusions is 141~332 ℃, and is mainly concentrated at 211~252℃. The salinitie is 2.74%~8.81% NaCl eqv, and is concentrated at 3.58%~4.51% NaCl eqv. The oreforming fluids are medium—low salinity and medium—low temperature CO2H2ONaCl fluids. Combining with the HO isotopic compositions of gold deposits in Penglai gold belt, it is showed that the fluids in the initial and metallogenic periods are mainly magmatic fluids. The orefroming fluids are mixed fluids of magmatic and atmospheric water.
