Abstract:

Limei Pb-Zn deposit ranks among the most significant super-large lead and zinc deposits in China, holding substantial economic value and scientific relevance. By analyzing the characteristics of ore-controlling structures, stratigraphic sequences, and sedimentary structures, the study identified the Huayuan fault as a synsedimentary fault formed during the Cambrian period. The Cambrian Qingxudong Formation in the Limei ore field is classified within the carbonate system of a hinge belt setting, where the primary lithofacies are algal reef limestone facies, while the associated microfacies include platform edge beach facies and algal reef facies. The development of fracture structures in the algal limestone exhibits notable mineralization, particularly in areas with dense network structures, which frequently lead to the formation of rich lead-zinc ore bodies. Overall, the mineralization process of the deposit is strictly controlled by the structural factors, algal reef facies, and adjacent shoal facies. This research provides valuable insights for the exploration of lead-zinc mineral deposits in theregion.

Key words: Huayuan fault, synsedimentary fault, tectonic-sedimentary lithofacies, Limei ore field