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作者在广东凡口泥盆系含矿层中首次发现了钙藻化石,这对研究凡口铅锌矿床的成因、金属运移和富集,提供了有力的论据。 一、矿区泥盆系地层层序及岩性特征 本区泥盆系分上、中两统。上统自上而下分为: 1.帽子峰组砂页岩。 2.天子岭组,其主要岩性为:(1)云斑状灰岩,产叶状藻化石;(2)瘤状灰岩,产葛万藻化石;(3)(藻)灰岩,产轮藻科化石,并含多层菱铁矿。 中统自上而下可分为: 1 柑子(?)组 其主要岩性为:(1)铁白云化灰岩,产努亚藻化石和叠层石;(2)碎屑岩,主要为砂、页
The authors first discovered calcareous fossils in the Devonian strata in the Fankou, Guangdong Province, which provided a strong argument for studying the genesis, migration and enrichment of the Fankou lead-zinc deposit. First, the stratigraphic sequence and lithological characteristics of the Devonian in the area The Devonian is divided into upper and middle two systems. The top is divided into top-down: 1. Hat Peak sand shale group. 2. Tianziling Formation, the main lithology is: (1) cloud-like limestone, leaf phylloid fossils; (2) tumorous limestone, producing Ge Wan algae fossils; (3) Section fossils, and contains multi-layer siderite. The Central Plains can be divided into top-down and top-down: 1 The main lithology of the Ganzi (?) Formation is: (1) iron-white cloud limestone, nodular fossils and strata; (2) clastic rocks, Sand, pages