ANALYSIS OF METALLOGENIC SYSTEM IN XIUYAN GOLD DEPOSIT, LIAONING PROVINCE

In the Xiuyan gold deposit located at the contact zone between the Indo Chinese granitic batholith and the Lower Proterozoic metamorphic xenolith in Liaohe Group, the mineralization types are composed mainly of the quartz vein type and minorly of the altered rock type. This study reveals that a granitic magma system closely associated with the mineralization in terms of space, time and materials, accounts for the gold mineralization. The analysis of the fluid inclusion indicates that there are several sorts of inclusions in vein quartz, that the ratios of gas to (liquid + gas) ranges very widely, that the homogenization temperature (t_h) is high with the highest temperature rising to 500 ℃, that the t_h distribution reflects the multi peak model, and that the inclusions rich in CO 2 and organism are easily discovered, typical magma source and mantle source. The mineralization types are controlled both by the tectonic stress field and by the fracture mechanic property.