摘要
福建省早古生代地层因化石稀少影响时代确定。应用测年分析技术,对福建清流一带林田组、东坑口组典型样品进行矿物测年分析,获得年龄主要分布于500Ma~550Ma、次为900Ma~1000Ma,暗示其物源主要为晋宁构造层,次为泛非构造层。根据获得的最年轻年龄约束林田组和东坑口组形成时限在490Ma之后。在侵入林田组、东坑口组的闪长岩中获得450.9Ma的测年数据,确定林田组与东坑口组沉积时限在450.9Ma之前。本文为研究福建早古生代地层沉积层序和物源研究提供了重要的新资料。
The age of the Early Paleozoic strata in Fujian Province was determined due to the scarcity of fossils. Using dating analysis technology, mineral dating analysis was carried out on typical samples of Lintian Formation and Dongkengkou Formation in Qingliu area, Fujian Province. The ages obtained were mainly 500Ma~550Ma and secondly 900Ma~1000Ma,suggesting that the provenance was mainly Jinning structural layer and secondly Pan African structural layer. According to the youngest age obtained, the formation time limit of Lintian Formation and Dongkengkou Formation is after 490 Ma. The dating data of 450.9 Ma were obtained from diorite intruding into Lintian Formation and Dongkengkou Formation, and it was determined that the sedimentation time of Lintian Formation and Dongkengkou Formation was before 450.9 Ma. This paper provides important new data for the study of sedimentary sequence and provenance of Early Paleozoic strata in Fujian.
作者
江锦忠
JIANG Jin-zhong(The Western Geological Party Of Fujian,Sanming 353000,China)
出处
《世界有色金属》
2022年第20期116-118,共3页
World Nonferrous Metals
关键词
地层层序
林田组
东坑口组
矿物测年分析
stratigraphic sequence
Lintian Formation
Dongkengkou Formation
Mineral dating analysis
