华南广西运动后泥盆纪碎屑岩地层的划分和对比  

SUBDIVISION AND CORRELATION OF THE DEVONIAN CLASTIC STRATA AFTER THE KWANGSIAN OROGENY IN SOUTH CHINA

作　　者：王怿[1,2] 郄文昆 徐洪河[1] 郭文 张小乐[1] 卢建峰 黄璞[1] 王凯[1,2] 彭辉平 陈雨萱 赵文金 WANG Yi;QIE Wen Kun;XU Hong He;GUO Wen;ZHANG Xiao Le;LU Jian Feng;HUANG Pu;WANG Kai;PENG Hui Ping;CHEN Yu Xuan;ZHAO Wen Jin(Key Laboratory of Palaeobiology and Petroleum Stratigraphy,Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences,Nanjing 210008;University of Chinese Academy of Sciences,Nanjing,Nanjing 211135;Key Laboratory of Vertebrate Evolution and Homan Origins of Chinese Academy Sciences,Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044;University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院南京地质古生物研究所,古生物学和油气地层应用重点实验室,江苏南京210008 [2]中国科学院大学南京学院,江苏南京211135 [3]中国科学院古脊椎动物与古人类研究所,中国科学院脊椎动物演化与人类起源重点实验室,北京100044 [4]中国科学院大学,北京100049

出　　处：《地层学杂志》2024年第2期124-146,共23页Journal of Stratigraphy

基　　金：国家重点研发计划项目(2022YFF0800200);国家自然科学基金(42172003、42072026)共同资助。

摘　　要：广西运动后,华南泥盆纪最先接受的沉积为碎屑岩,由于厚度大、化石较少,其地层划分和对比存在诸多探究点。本文根据华南117条剖面的实地考察或研究,开展了以生物地层学为主的综合地层学研究,旨在揭示广西运动后泥盆纪最初碎屑岩地层的划分和对比;以与下伏地层的接触关系为主要依据,将华南广西运动后泥盆纪碎屑岩地层分为角度不整合类型、平行不整合类型、龙门山类型(只限早泥盆世);综合分析了华南泥盆纪植物群、孢子组合和鱼组合的特征,并以此为主要依据,结合上覆地层的海相动物化石,对华南广西运动后泥盆纪碎屑岩地层进行了划分和对比。在华南,广西运动后接受沉积的总体进程呈现为由西南向东北的趋势,经历了一个由陆地、陆海过渡到正常浅海的过程;在泥盆系各沉积时段,其沉积环境的变化过程基本一致,但在不同区域的发生时间和后续进程各不相同、各具特色。The first sediments received in the Devonian in South China were clastic rocks after the Kwangsian Orogeny(Caledonian).The clastic rocks are very thick and contain few fossils,which caused difficulties in stratigraphic division and correlation.Based on the biostratigraphic and lithostratigraphic data from 117 sections in South China,the subdivision and correlation of these Devonian clastic strata were performed.Three types of the Devonian clastic strata were recognized in the contact type with the underlying strata,namely,angular unconformity,parallel unconformity,and the mixed type(or Longmenshan type seen in the Early Devonian only).The revision of the subdivision and correlation of the Devonian clastic strata after Kwangsian Orogeny were summarized based on the biostratigraphic data of the fossil plant flora,spore and fish assemblages,in consideration of marine animal fossils from the overlying strata.The comprehensive analysis in geochronology,paleontology,lithology,and palaeogeography of the Devonian strata after the Kwangsian Orogeny in South China,reflected a trend of sedimentary process from southwest to northeast,indicating a transitional process from land to shallow sea.During the Devonian,changes in sedimentary environment are consistent in general,but the initiation of deposition and subsequent sedimentary processes in various regions are different and distinctive.

关 键 词：华南 广西运动 泥盆纪 碎屑岩地层 划分和对比 总体进程 

分 类 号：P534.44[天文地球—古生物学与地层学]