Characteristics, genesis and significance of the Jiuzigou copper deposit in Fengxian County, Shaanxi Province

Jiuzigou deposit is a newly discovered copper deposit in the Fengxian-Taibai Pb-Zn polymetallic ore district. Siliceous, silicified limestone and quartz-calcite are the main mineralization types. Ore bodies in layered, stratoid and lenticular forms are in conformable contact with the host rocks and cut by late quartz-calcite veins, forming rich ore bodies. Combining geological features with geochemical characteristics, the authors hold that this ore deposit is of the SEDEX-rebuilt type. The Jiuzigou deposit and other ore deposits in this region constitute a typical SEDEX element zoning model. This discovery, in combination with other structural characteristics, will play a significant role in guiding the future exploration in this area.