夹皮沟金矿深部成矿预测研究

系统研究了夹皮沟地区二道沟、庙岭、大猪圈、下戏台和东坨腰子等矿床矿体和近矿围岩微量元素、矿石矿物组合和黄铁矿热电系数等的垂直变化特征，认为三者具有相互一致的变化规律，即：与热液金矿床通常的分带性相比，具有逆向分带的现象，这种特征被认为是多层次正常分带上下叠加的产物，反映夹皮沟地区金矿床在垂向上普遍存在着多个富集地段.据此预测二道沟、庙岭、大猪圈、下戏台和东坨腰子等矿床在目前的开采深度下部仍有发现深部矿体的可能.

DEEP SEATED PROGNOSIS OF THE GOLD DEPOSITS IN THE JIAPIGOU REGION

The Jiapigou gold mine,located in Jilin Province,is one of the earliest mined and the most important gold producing area in China But now its minable reserves are decreasing and becoming insufficient This paper provides a prospective prognosis by comprehensive studies of the vertical variations of primary geochemical halo data in orebodies and near wall rocks,ore mineral association and thermoelectricity of pyrites The primary geochemical halo data are generally characterized by Au,Ag,Pb,Mo and Ti anomalies in the upper part of orebodies,Bi,Zn,Mn,W and Mo anomalies in the middle,As,Sb,Hg,Cu,Pb and Ag anomalies in the lower The ore mineral associations feature a large amount of base metal sulfides occurring in the top and the lower part of orebodies The thermoelectrictity of pyrites is of negative value and trends larger with the increase of depth All of these characteristics are different from the vertical normal zonation in hydrothermal gold deposits such as Jiaodong and other regions These prospective prognoses imply that there are still undiscovered deep seated orebodies under the present mining level in the deposits of Erdaogou,Dazhujuan,Xiaxitai and Dongtuoyaozi