福建省永定地区下村组、藩坑组地层地质特征

Stratigraphic and Geological Characteristics of Xiacun and Fangkeng Formations in Yongding County, Fujian Province

本文以１：５万区调资料为基础，并参考了有关专题研究等资料，通过岩性组合、岩相及沉积特征，以及接触关系、古生物、同位素测年等成果的综合分析研究，将闽西南地区早佛罗世地层重新厘定为下村组和藩坑组，并划分成５个岩性段。借此介绍以增进省内外地学界对该区早佛罗世海陆交互沉积－火山喷发堆积地层的了解和认识。

This paper focuses on the analysis of lithological association, lithofacies and sedimentary features,contact relations, palaeontologic data and isotopic dating results of lower Jurassic in Southern Fujian. Based on the 1: 50000 regional geological surveying data and the analysis, the author collated the lower Jurassic strata in Southern Fujian and put it under Xiacun and Fangkeng Formations, which can be divided into five lithologic units. The paper will improve the understanding and recognition of early Jurassic continental-oceanic sedimentary and volcanic accumulation strata in the area.