黑龙江右岸金矿床类型及特征

The Types and Characters of Gold Deposit in the Right Bank of Heilongjiang

黑龙江右岸是个重要的金矿成矿带,带内蕴藏有丰富的黄金矿产资源。砂宝斯、东安、团结沟等大型金矿床产出于该区。带内矿床大体可划分为燕山中期产于碎屑岩中与中酸性岩有关的金矿床、与燕山中期中性火山岩有关的金矿床、燕山期与中酸性火山-侵入杂岩有关的金矿床、燕山中期与中酸性潜火山岩浆作用有关的金矿床四种类型。矿床在成矿作用特征及成矿时代上,表现出高度的一致性,成矿作用集中于中生代,矿床成因以浅成低温热液为主,燕山期的岩浆活动是成矿主要控制条件。矿床在空间分布上,集中产出部位均具有受北东向与北西向构造综合控制的特点,矿床空间丛集产出地段在空间上呈现北东呈串、北西呈带、交汇地段成片的规律,反映成矿作用受区域构造控制,特别是区域性断裂、褶皱及其低序次构造,为成矿提供重要条件。

The right bank of Heilongjiang is an important gold deposit of rich mineral resources. Many mining areas lie there, such as Shabaosi Dongan and Tuanjiegou and so on. The deposit is divided into four types substantially： one that forms from elastic recks and acid rock in Yanshan mid-period, one that is about neutral volcanic in Yanshan mid-period, one that is about mid-acid extrusive rock and intrusion in Yanshan period, one that is about the effect of mid-acid volcano lava in Yanshan mid-period. The mining beds appear greatly consistency in the characters and times which form mine. They form mostly in Mesozoic, the causes of formation depend on low temperature and hot liquid, the movement of lava is the main control requirement for mineralization. The deposits are all controlled by east-north and west-north structures, and ap- pear bunchy in east-north, belts in west-north regularly. This shows that the causes of formation are controlled by regional strueture, espeeially the regional breaks and winkles provide the main conditions.