福建建瓯地区“竹洲砾岩”的厘定

Redefinition of the "Zhuzhou conglomerate" in the Jian''''ou area, Fujian, China

摘要: 对发育于福建建瓯市迪口镇竹洲村的“竹洲砾岩”的野外调查和室内研究表明,该砾岩既不是前震旦系马面山群龙北溪组的底部砾岩,也不是构造砾岩,而是相当于晚三叠世大坑组（T3d）层位的底砾岩,不整合沉积在前震旦系迪口组之上.这一发现对深化研究该地区前寒武纪地质构造演化历史具有重要意义.

Abstract: Field survey and laboratory study of the "Zhuzhou conglomerate" at Zhuzhou Village near Dikou Township, Jian'ou City, Fujian, indicate that the "Zhuzhou conglomerate" is neither the basal conglomerate of the pre-Sinian Longbeixi Formation of the Mamianshan Group nor structural brecciate in the pre-Sinian basement, but the basal conglomerate stratigraphically equivalent to the Late Triassic Dakeng Formation (T3d), unconformably overlying the pre-Sinian Dikou Formation. This discovery has great significance for the intensive study of the Precambrian tectonic evolution of the area.