黑龙江东宁金厂金矿床角砾岩型金矿体地质特征及找矿标志

金厂金矿床是中国东部陆缘超大型热液金矿床之一,矿床类型有隐爆角砾岩型、环状放射状裂隙充填-岩浆穹窿型、接触带型,其中角砾岩型矿体占矿区探获总资源量30%以上,是矿区勘查工作重点。角砾岩型矿体在空间上呈东西向等间距分布,地表出露面积小,且具有延深大、规模大、品位稳定、资源量集中等特点。根据多年矿区勘查经验,重点总结了角砾岩矿体地质特征,研究了矿床地球化学特征,分析了成矿物理化学条件,总结了构造、矿化蚀变、物化探异常、遥感异常等角砾岩型矿体的找矿标志。

Geological characteristics of breccia type gold deposit and its prospecting significance in Jinchang,Dongning,Heilongjiang

Jinchang gold deposit is one of the super large-scale hydrothermal gold deposits located in the east continental margin of China mainland.There are three types of orebodies for the deposit：the cryptoexplosion breccia type,cyclic and radial fissure filling-magmatic dome type,and contact zone type deposit.Among them the breccia type is the exploration priority which takes more than 30 % of the proved reserves.The breccia type orebody strikes east-west with equal intervals and characteristics of small outcrop area,far stretch,large scale,stable grade,and concentrated resources.The paper,based on years＇ experience of prospecting focuses on the summary of geological features of breccia,studies its geochemical characteristics,analyzes the conditions of metallogenic physical chemistry and summarizes the prospecting indicators like structure,mineralization alteration,physical chemical prospecting anomalies and remote sensing anomalies.