首次在赣东北蛇绿混杂岩带分布的弋阳县及德兴市境内被前人定为中元古界双桥山群与下震旦统志棠组中发现了一批晚古生代放射虫化石。对樟树墩和登山两处与含放射虫硅质岩共生的岩石组合、硅质岩的岩石学、地球化学及放射虫化石属种特点进行了综合分析 ,表明它们应是一套洋盆深水环境的沉积。这一新发现不仅为研究赣东北蛇绿混杂岩带的性质、形成时代 ,也为重新厘定“板溪群”的构造属性及华南大地构造格局问题提供了科学依据 For the first time, a number of late Paleozoic radiolarian fossils were found in the epithermal Shuangqiaoshan Group and the Lower Sinian Tongzhi Formation in Yiyang County and Dexing City, where the ophiolite melange belt was distributed in the northeastern Jiangxi Province. . A comprehensive analysis of the rock assemblages, the petrology, geochemistry and the characteristics of radiolarian fossils belonging to the symbiotic association between camphor tree stumps and mountaineering with radiolarian chert, suggests that they should be a set of oceanic deep-water environment Deposition. This new discovery not only provides a scientific basis for studying the nature and age of the ophiolitic melange belt in the northeastern Jiangxi Province but also for re-determining the structural properties of the “Banxi Group” and the tectonic framework of the southern China