黄沙坪铅锌矿床断裂构造分形研究及其控矿特征

Fracture Structural Fractal Analysis and Ore-controlling Characteristics of the Huangshaping Lead-zinc Deposit

黄沙坪铅锌多金属矿床是南岭成矿带的代表性矿床之一,开采历史悠久,成因上属于浅成中高温接触交代矽卡岩型叠加中低温热液充填铅锌矿床。构造分形分析认为NE-NNE向构造发育最为成熟,同时,该构造及其配套构造连通性最好,为成矿流体的运移和矿体的就位提供了有利的构造条件。矿床内矿体严格受岩浆侵入接触构造与断裂-褶皱构造共同控制,产出于构造耦合的岩性界面。总结不同构造型式的控矿特征,为矿床深部隐伏矿找矿预测提供理论依据。

The Huangshaping lead-zinc polymetallic deposit with a long history of mining is one of the representative deposits in the Nanling metallogenic belt. Genesis of deposit was skarn type with shallow-medium-medium-high temperature superimposed medium-low temperature hydrothermal lead-zinc deposit. The structural fractal analysis shows that NE-trend structure was the most mature in tectonic development. As the best connectivity of NE-NNE trend structure had, which provided favorable structural condition for the migration of ore-forming fluids. Simultaneously, ore body was strictly controlled by the magmatic intrusion structure and the fracture-fold structure, which was produced by coupling with the structural and lithologic interface. Summarized different characteristics of ore-control tectonic types provided a theoretical basis for prospecting prediction of deep concealed ore body.