APPLICATION OF GEOCHEMICAL PROSPECTING TO THE JIJIAWA GOLD DEPOSIT AND ITS ADJACENT REGIONS IN HENAN PROVINCE

The Jijiawa gold deposit in Henan Province,located at the southern margin of North China Craton,is a small-scale deposit in the Xiongershan goldfield. Gold ore bodies are hosted within and have consistent attitudes with the NNE and / or SN trending fault fracture zones,which in turn strictly controlled the shapes and occurrences of the ore bodies. A systematic whole-rock geochemical survey on fracture zones F1 and F7 in the adjacent region of the deposit is carried out,and several high strength Au anomalies controlled by the fractures have been confirmed. After drilling construction,gold ore bodies have been discovered. The statistical analysis on the primary halos of the drilling cores further indicates that the ore bodies extend downwards in some degree.The drilling construction also reveals gold ore bodies in depth developing along the fractures. In terms of calculation on resource reserve,the discovered deposit is medium-sized in scale. There are lots of mineralizing fractures in the adjacent regions of the Jijiawa deposit,in which the primary halos have following characteristics. The front-halo elements are well-developed,but rear-halo elements aren't. Moreover,the front-halo elements,main ore-forming halos and rear halo elements are developed at depth. As a result,the new discovered gold ore bodies extend at depth. We thus suggest that there are good ore prospects in the adjacent regions of the deposit.