湘西花垣铅锌矿田的成矿构造

在对湘西花垣铅锌矿田的成矿地质背景、矿床地质特征和矿石结构构造研究的基础上,重点分析了花垣矿田成矿构造特征,包括成矿前构造、成矿期构造和成矿后构造。通过矿田地质调查,认为铅锌成矿作用与液压角砾岩关系密切,而液压角砾岩为成矿期构造;根据成矿后断裂的主要特征,结合擦痕产状,反演出花垣矿田成矿后共受到3期构造应力作用;根据成矿期构造的空间分布规律(成矿期构造受花垣—张家界断裂左行走滑形成的张性空间控制)和原始礁灰岩台地的分布规律,预测了远景勘查区域。

The ore-forming structural of Huayuan lead-zinc ore field in western Hunan province

This paper briefly introduces the geological background,geological characteristics and ore tex-tures and structures of the Huayuan lead-zinc deposit in western Hunan Province and focuses on the analy-sis of characteristics of the ore-forming structure which involves the pre-mineralization structure,mineral-ization structure and post-mineralization structure.Investigation of the ore field shows that the minerali-zation is closely related to hydrofractural breccia and the breccia fracture is the syn-mineralization struc-ture.According to the characteristics of the post-mineralization fracture and the occurrence of striation the Huayuan Pb-Zn ore field are exposed to three stresses after mineralization.Prospects for further explora-tion are predicted according to spatial distribution pattern of the syn-mineralization fracture (i.e.the syn-mineralization fracture is controlled by tensional space resulted from left hand strike slip of Huayuan-Zhangjiajie fault)and reef limestone.