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由于早古生代微古化石群的发现（薛重生等，１９９５），赣东北广丰－上饶地区的登山岩群被划归下古生界，本文介绍了登山岩群中海相火山岩的地质特征，对其中的拔竹坑岩组、叶家岩组的火山岩岩石地球化学特征和成因进行了研究，指出该两岩组火山岩均属岛弧拉斑玄武岩系列，并具向大洋拉斑玄武岩过渡的性质，是弧后小洋盆扩张期的产物。两岩组火山岩在火山活动方式、岩浆演化方式和岩浆进化程度上存在与洋壳由早到晚减薄的相应规律变化。
Due to the discovery of the Paleozoic microfacies (Xue Chongsheng et al., 1995), the mountaineering rocks in the Guangfeng-Shangrao area of northeastern Jiangxi are assigned to the Paleozoic. This paper presents the geological features of the marine volcanic rocks in the mountaineering group. The geochemical characteristics and genesis of the volcanic rocks in the Putaokeng Rock Group and the Yejiaan Formation are studied. It is pointed out that the volcanic rocks in the two groups belong to the arc-arc basalt series and have the property of transition to basaltic rock basalt. After the expansion of small ocean basin product. The volcanic rocks of the two groups have corresponding regularities of volcanic activity, magmatism evolution and magma evolution with the decrease of the oceanic crust from early to late.