摘要
黑龙江金厂金矿是一特大型金矿床,该区中生代构造-岩浆活动强烈,并伴随大规模的热液蚀变活动,形成了金厂矿床的隐爆角砾岩型、裂隙充填型、岩浆穹窿型及接触带型等多种矿化类型,而热液扩容充填成矿可作为该矿区的代表性矿化类型。通过FLAC3D软件进行金厂矿区热液成矿过程计算模拟,结果表明:燕山晚期花岗斑岩对本区金成矿具有控制作用;本区温度场的分布受成矿岩体规模控制;受东西向压应力场影响,本区出现了NW、NE向的剪切应变带及NEE-SWW向展布的张应变扩容区,扩容区不仅与流体汇流、实际成矿位置对应较好,还指示了新的找矿靶区。
The Jinchang gold deposit is a super-large deposit with frequent Mesozoic tectonic-magmatic activities and extensive hydrothermal alteration. The orebodies are of cryptoexplosion breccia type,crack-filling type,magma dome type and contact zone type. The crack-filling type mineralization in hydrothermal dilation spaces is dominant. Computational modeling of the mineralization process is carried out on FLAC3 D. The modeling results demonstrate that Late Yanshanian granite-porphyry plays an important role in the gold mineralization,and the distribution of temperature is controlled by the scale of granite-porphyry. NW and NE trending shear strain zones and NEE-SWW trending tensile strain areas are derived from the regional EW compression. The tensile dilation areas are consistent with both fluid focusing and mineralization positions. The results indicate new targets for exploration.
出处
《桂林理工大学学报》
CAS
北大核心
2015年第4期780-785,共6页
Journal of Guilin University of Technology
基金
广西自然科学基金项目(2014GXNSFBA118231)
武警黄金指挥部项目(01-03)
广西矿冶与环境科学实验中心项目
关键词
热液成矿
计算模拟
成矿机制
金厂金矿
黑龙江
hydrothermal mineralization
computational modeling
metallogenic mechanism
Jinchang gold deposit
Heilongjiang
