关键词: 花园鲁地区, 多金属矿区, 成矿地质条件, 地球化学异常, 控矿因素

Abstract: The Huayuanlu area in Anhui Province belongs to the Lujiang-Chuzhou metallogenic sub⁃ zone，and has good copper-gold polymetallic metallogenic potential. In order to find out the metallogenic conditions and ore-bearing rules in this area and clarify the prospecting direction，on the basis of previous studies，the geological characteristics of the study area are systematically analyzed by means of geological mapping，borehole logging，stream sediment measurement and identification under rock and mineral mi⁃ croscope. The results show that the area is dominated by Sinian clastic rocks and carbonate rocks. The Huangxu Formation and Dengying Formation are the dominant ore-bearing strata，and the middle section of Dengying Formation is the main gold-bearing horizon. The Huanglishu-Poliangting fault and its second⁃ ary structure are important ore-controlling structures. The Machang composite intermediate-acid rock mass provides material and heat source for mineralization，forming a strata-structure-magmatite coupling ore�controlling system. The anomalies of Cu，Au，Ag，Mo，Pb and Hg in the area are distributed in the north⁃ east direction，with clear concentration zoning and good nesting relationship，which are typical ore -in⁃ duced anomalies. The area is dominated by skarn copper-gold mineralization，followed by porphyry cop⁃ per-molybdenum mineralization. The ore bodies are mostly produced in the contact zone of rock mass and tectonic fracture zone. Skarnization，silicification and pyritization are important prospecting indicators. The magmatic contact zone，the intersection of faults and the concentration center of geochemical anomalies are the key prospecting targets. The research results can provide reference for the exploration of similar depos⁃ its in eastern Anhui.

Key words: Huayuanlu area, polymetallic ore field, ore-controlling geological conditions, geochemi? cal anomaly, ore-controlling factors