Abstract:Metamorphic rocks of the Meso- and Cenoproterozoic Dongyan Formation in central Fujian are an important source bed of lead-zinc polymetallic deposits. The metamorphic rocks consist of three basic-acid volcanic-sedimentary cycles and show the features of bimodal volcanic rocks. Each volcanic cycle starts with basic rocks and ends with acid rocks, and marine carbonate rocks often occurred during dormant periods, especially at the end of each cycle. Lead-zinc-silver deposits are usually associated with basic volcanic rocks. Petrological and chemical analyses of the metamorphic rocks of the Dongyan Formation reveal that the protoliths of the metamorphic rocks of the formation have the features of continental rift tholeiite and formed in an intraplate rift environment. The tectonic setting should be the extensional environment in the interior of the continental plate.
参考文献
相似文献
引证文献
引用本文
陶建华 胡明安. 闽中地区中新元古代东岩组地层的含矿性研究[J]. 中国地质, 2006, 33(2): 418-426. TAO Jian-hua, HU Ming-an. Ore potential of the Meso- and Cenoproterozoic Dongyan Formation in central Fujian[J]. Geology in China, 2006, 33(2): 418-426(in Chinese with English abstract).