广西罗维钨多金属矿床地质特征及成矿模式

Geological characteristics of mineralization and metallogenic model of the Louwei tungsten polymetallic deposit in Guangxi

罗维钨多金属矿位于西大明山成矿带的东端。矿床产于寒武系碎屑岩矽卡岩化蚀变带中,初步圈定两条钨多金属矿带,圈定41个矿体。矿体总体为EW走向,呈层状、似层状产出,厚度、品位较稳定,规模较大。矿石类型以矽卡岩型矿石为主,少量石英脉型矿石。矿石中的主要金属矿物有白钨矿、闪锌矿、铁闪锌矿、磁黄铁矿及辉铋矿等。与成矿关系密切的蚀变为矽卡岩化与磁黄铁矿化。本文在分析矿床成矿地质特征的基础上,研究总结了矿床成矿要素及找矿标志,建立了矿床的成矿模式,初步认为该矿床为受一定的层位、岩性、构造及岩浆岩控制的矽卡岩型矿床,对矿区下一步找矿工作及在西大明山地区寻找该类型的矿床具有参考意义。

The Luowei tungsten polymetallic deposit is located at the eastern end of the West Damingshan metallogenic belt.Hosted in skarn alteration zones developed in Cambrian clastic rock units,the deposit is initially difined two tungsten polymetallic-ore belts,in which 41 ore bodies are verified.Striking generally EW trend,the bedded and quasi-bedded mineralization is less variation in thickness and ore grade.The typical ore mineralogy is skarn type with lower amounts of quartz storkwork.The main metal minerals in the ore include scheelite,sphalerite,marmatite,pyrrhotite and bismuthite.Alteration such as skarnization and pyrrhotite mineralization is believed having close relation with mineralization.Based on the analysis of the ore-forming geological characteristics of the ore deposit,this paper summarizes the ore-forming elements and prospecting indicators of the ore deposit,and establishes the mineralization model of the deposit.It is preliminarily considered that the deposit is a skarn deposit controlled by a certain layer,lithology,structure and magmatic rock.These new results provide insights into the next prospecting work in the mining area and the same type deposits in the West Damingshan area.