福建政和—建瓯地区叶蜡石矿地质特征及找矿方向

Geological Characteristics and Prospecting Direction of Pyrophyllite Deposits in Zhenghe to Jian’ou, Fujian Province

福建政和—建瓯为我国重要的叶蜡石成矿带,区内发现的井后叶蜡石矿床为世界最大的单体矿床。为进一步查明区域成矿地质条件,本文在野外地质调查的基础上,对区内叶蜡石成矿地质特征进行了研究总结。区内叶蜡石矿床为中—低温热液交代型,控矿因素为区域深大断裂、地层条件及大型火山机构,找矿标志为叶蜡石化蚀变、次生石英岩化蚀变、火山盆地或洼地内的南园组地层及“硅帽”地形标志等。根据区域成矿地质条件和找矿标志,在研究区圈定两处找矿远景区,对下一步找矿工作有一定指导意义。

The Zhenghe to Jianou pyrophyllite metallogenic belt in Fujian province is an important pyrophyllite metallogenic belt in China. Among which jinghou deposit is the largest pyrophyllite deposit in the world. In order to further find out the regional metallogenic geological conditions, the geological characteristics of pyrophyllite mineralization in the region are studied and summarized on the basis of detailed field geological survey. The survey shows that the pyrophyllite deposit in the area is of medium low temperature hydrothermal metasomatic type. The ore controlling factors are regional deep and large fractures, stratigraphic conditions and large volcanic institutions. The prospecting indicators are pyrophyllite alteration, secondary quartzite alteration,Nanyuan formation strata in volcanic basin or depression and "silicon cap" topographic indicators. According to the regional metallogenic geological conditions and prospecting indicators, two prospecting prospects are delineated in the study area, which has certain guiding significance for the next prospecting work.