福建省东部火山岩地区区域地球物理,地球化学特征与银矿的关系

福建省东部火山岩地区银的背景含量高，尤其是上侏罗统南园组火山岩地层银含量很高，成矿物质来源丰富。经重新对区域地球物理、地球化学资料的综合分析，发现福建东部存在３个大型环状构造，银的地球化学高背景的分布受线状构造和环状构造的双重影响，反映了中生代时期岩浆－构造活动的基本特征及其对银成矿的控制作用。

Relations of Ragional Geophysical and Geochemical Characteristics of the Volcanic Terrain with the Silver Ores in Eastern Fujian

There is the high background values of silver in the volcanic terrain of Eastern Fujian, expecially in the volcanic strata of Nanyuan Formation (Upper Jurassic). By the comprehensive analysis of the regional geophysic and geochemical data, it was found that there are three large ring-like structures in Eastern Fujian and that the distribution of high silver geochemical background values was under the influence of both the linear structures and ring-like structures, which show the basic characteristics of Mesozoic magmatic-tectonic activities and their controlling of silver mineralization. The analysis results indicate that the area Of Zhenghe-Shouning in the northern part of Eastern Fujian, the area of FuqingDehua in the middle pet of Eastern Fujian and the area of Yunxiao-Yongding in the southern part of Eastern Fujian are the important area of searching for the silver ores of the volcanic-subvolcanic rock type.