桂东北地区钨锡找矿潜力与成矿预测初步探讨

Discussion of exploration potential and mineralization forecast of tungsten and tin deposit in northeast Guangxi

工作区处于扬子与华夏板块交汇部之湘南桂东北坳陷区,NE向与NW向深部构造岩浆岩带复合部,属南岭重要产锡"金三角"之一,锡钨矿床点集中分布于花山-姑婆山、都庞岭及越城岭三个锡多金属成矿远景区。区内已发现钨锡矿床点100余处,探明的原生钨锡矿床21处,其中大型2处、中型6处。矿床类型齐全,包括岩体型、矽卡岩型、矽卡岩与蚀变破碎带复合型、蚀变破碎带型、蚀变花岗岩型、石英(长英岩、云英岩、伟晶岩)脉型等,以前三者为主。矿床受成矿花岗岩、有利的赋矿层位及构造复合因素控制,与燕山早期成矿花岗岩关系尤为密切,成矿物质和成矿流体主要来自岩浆活动。初步确定桂东北地区具大中型远景的找矿靶区12处。

The workaround is located at south Hunan -- east Guangxi depression between the Yangzi and Huaxia plate. NE and NW deep structural magmatic belt is belonged to the important tin mine in the South Mountains. Sn--W deposits are concentrated at the three mineralization perspective areas： Huashan--Gu- poshan, Dupangling and Yuechengling. There are more than 100 Sn--W deposits in the region, including 21 primary deposits and 2 large scale and 6 middle scale deposits. The deposit types include magma type, skarn type, altered fragment type, altered granite type and quartz vein type. The deposit is controlled by mineralized granite and ore--bearing stratum. They are closely related with the early Yanshan granite. The ore ma- terial and fluid are from magmatic activity. It is simply determined that there are 12 exploration targets of the middle to large scale perspective in the northeast Guangxi.