于都-赣县矿集区“地下室”钨矿化地质特征及找矿标志

Mineralization Features and Prospecting Indications for the“Basement-typed”Tungsten Deposit in Yudu-Ganxian Ore-concentrated Area

在"五层楼+地下室"找矿模型指导下,近年在于都-赣县矿集区石英脉型钨矿床深部新发现一处隐伏岩体型黑钨矿床。通过对勘查矿区成矿地质条件和钨矿化特征的研究,认为成矿岩体是富钠长石锂云母(白云母)花岗岩,含泥质成分高的围岩构成良好封闭条件,岩体顶峰凹凸转折部位是矿化富集有利部位。发育隐伏蚀变花岗岩矿区往往有低缓磁异常和化探组合异常,地表岩层露头具不同程度的角岩化、云英岩化,发育"五层楼"矿化标志带。

In recent years, under the guidance of empirical model, called ＂Five levels＋ Basement＇, a series of body- type tungsten deposit in Yudu-Ganxian ore district has been found on the surface of the quartz vein tungsten deposit of depth. Research on the geological conditions and characteristics of tungsten mineralization in the exploration area, it is considered that the ore forming rock mass is rich in sodium feldspar and lithium mica granite, and the surrounding rock with high mud content is a good sealing condition.The development of buried altered granite mining area tend to have weak magnetie anomalies and geochemical anomalies and the surface outcrops with different degree of hornfelsic, greisenization, marks the development of ＂five storey＂ mineralization belt.