关键词: 矽卡岩型铜金矿, 地质特征, 矿床成因, 找矿预测

Abstract: Systematic analysis of mine geological characteristics is the key to promote regional cop⁃ per and gold mineral prospecting prediction and improve resource utilization efficiency. Taking a skarn�type copper-gold deposit in Heilongjiang Province as the research object，combined with various methods such as field geological mapping，systematic profile survey，indoor rock and mineral identification and geo⁃ chemical test analysis，the natural geography and surface characteristics of the mining area，regional stra⁃ ta，mining area structure and magmatic rocks，and geochemical characteristics of the mining area were sys⁃ tematically studied. The geological characteristics of ore，ore body and surrounding rock are evaluated. On this basis，the genesis analysis and prospecting prediction of the deposit were carried out. The results show that the enrichment characteristics of ore-forming elements in the mining area are significant. The order of element enrichment degree from high to low is As、Sb、Cu、Pb、Zn、W、Ni、Au、Mo、Sn、Ag、Bi. The metallo⁃ genic factor of Cu element is 100.55，and Cu and Au are the core ore-forming elements. Three NW-trend⁃ ing copper-gold mineralization belts are delineated in the mining area. The skarn in the area is weak calci⁃ um silicate skarn（SiO2 relative content 30.72%，Al2O3，Na2O，K2O total content 1.06%，Na2O content 0.07%）. The genesis of the deposit is mainly skarn type，superimposed with late hydrothermal mineraliza⁃ tion. The ore-forming parent rock is 109~116 Ma granite porphyry，which is controlled by three factors of strata，magmatic rock and structure. The Cu mineralization in the mining area is significant. The Ⅲ miner⁃alization zone is large in scale and the abnormal intensity of Cu and Au elements is high. It is an ideal tar⁃ get area for finding copper-gold deposits. The research results clarify the metallogenic regularity and pros⁃ pecting direction of the mining area，and provide theoretical guidance and practical reference for the explo⁃ ration and prospecting prediction of the same type of skarn copper-gold deposits in the region. In the fu⁃ ture，the occurrence of gallium，germanium and other elements can be identified through the study of sin⁃ gle mineral composition，so as to further improve the utilization value of mining resources.

Key words: skarn-type copper-gold deposit, geological characteristics, ore genesis, prospecting pre? diction