湖南道县小蓬江铅锌银矿床地质特征及找矿远景

Geological Characteristics and Prospecting Potential of Xiaopengjiang Pb-Zn-Ag Deposit in Daoxian County,Hunan Province

小蓬江铅锌银矿床区域成矿地质条件优越,但以往地质工作程度偏低,为系统评价其找矿远景,通过对矿床地质特征、控矿条件、找矿标志及成矿规律进行分析,讨论了矿区找矿远景。研究表明:(1)小蓬江铅锌银矿床属岩浆热液充填交代型铅锌多金属矿床,矿脉成群、成组分布于金鸡岭岩体西部内接触带中,受区域性控矿断裂F_1、F_2断裂的次级断裂带控制;(2)岩体内接触带、控矿断裂及次级断裂带、云英岩化等蚀变、民采老窿等为有利找矿标志;(3)矿区内NE向矿脉具有沿走向、倾向延伸较稳定的特点,其深部具有扩大远景的可能;(4)矿床成矿条件好,元素异常多,矿化明显,具有较好的找矿远景,可进一步开展矿产勘查工作。

The regional metallogenic geological conditions of Xiaopengjiang Pb-Zn-Ag deposit is good, but the geological working degree is low in the past. In order to conduct systematic evaluation of the prospecting prospect of mining area, the geological characteristics, orecontrolling conditions, prospecting criteria and metallogenic regularity are analyzed and studied, and the prospecting prospect is evaluated. The study results shows that： ①Xiaopengjiang Pb-Zn-Ag deposit belongs to the magmatic hydrothermal filling metasomatic Pb-Zn polymetallic deposit, the veins are grouped and grouped in the inner contact zone of the west of the Jinjiling rock mass, controlled by the secondary fracture zone of the regional ore controlling fracture F1 and F2 ;②inner contact zone of rock mass, ore-controlling fault and its secondary fault, alteration such as greisenization and old holes formed by people mining can be taken as the favora- ble prospecting criterias of the mining area ;③the northward vein in the mining area has a stable trend a- long the direction and tendency, and the deep part has the possibility to expand the prospect;④the metal- logenic conditions is good, the element anomalies are well developed, and the mineralization is obvious, therefore, the prospecting prospect of the mining area is good, it is necessary to conduct further mineral ex- ploration work.