鄂西北石炭纪四峡口组植物群初步研究  

A preliminary study of Carboniferous Sixiakou Flora from Northwest Hubei Province

作　　者：赵璧 邹亚锐 李姜丽 陈刚 武思琴 周冰洋 Zhao Bi;Zou Yarui;Li Jiangli;Chen Gang;Wu Siqin;Zhou Bingyang(Hubei Institute of Geosciences,Wuhan 430034,China;Hubei Key Laboratory of Resources and Eco-environment Geology,Wuhan 430034,China)

机构地区：[1]湖北省地质科学研究院,湖北武汉430034 [2]资源与生态环境地质湖北省重点实验室,湖北武汉430034

出　　处：《资源环境与工程》2025年第1期1-10,共10页Resources Environment & Engineering

基　　金：湖北省自然科学基金项目(2024AFD380);湖北省地质局科技项目(KJ2023-2,KJ2025-3)。

摘　　要：鄂西北郧西县四峡口地区石炭系发育良好,自下而上划分为袁家沟组、四峡口组、羊山组,其中四峡口组主体为一套黑色页岩,植物化石丰富。经化石采集和初步研究,描述了四峡口组植物5属7种,包括Lycopodites cf.liaoningense,Laveineopteris sp.,Cardiopteridium spetsbergense、Cardiopteridium podozamioides,Rhodea parasparsa,Sphenopteris cf.firmata、Sphenopteris obtasiloba,其中早石炭世扇状脉植物Candiopteridium属和晚石炭世真蕨类Sphenopteris属的化石标本最为丰富。结合海相生物地层对比,认为四峡口组植物群时代为早石炭世晚期—晚石炭世早期,其面貌界于秦岭草凉驿组植物群和二峪河组植物群之间,但植物群中未见鳞木目和楔叶类,还有待确认。南秦岭石炭纪植物化石在多地区已有发现,且时代跨度长、化石保存好,为修订石炭纪植物形态学和分类学认识、探讨华南—华北石炭纪植物演化关联和研究晚古生代中国植物区系演变提供了新的重要窗口。The Carboniferous in Sixiakou area of Yunxi County,Northwest Hubei Province is well developed,it is divided into Yuanjiagou Formation,Sixiakou Formation and Yangshan Formation from bottom to top.Among them,the Sixiakou Formation is predominantly composed of black shale with abundant plant fossils.Fossil collection and preliminary studies have been described as five genera and seven species of plants from this formation,including Lycopodites cf.liaoningense,Laveineopteris sp.,Cardiopteridium spetsbergense,Cardiopteridium podozamioides,Rhodea parasparsa,and Sphenopteris cf.firmata,Sphenopteris obtasiloba.Among these,the Early Carboniferous fan-veined plant Candiopteridium and the Late Carboniferous Sphenopteris fossils are the most abundant.Combined with marine biostratigraphic correlation,the age of the Sixiakou flora is considered to be late Early Carboniferous to early Late Carboniferous.The flora is transitional between the Caoliangyi flora and the Eryuhe flora of the Qinling region.However,the presence of Lepidodendrales and Sphenophyta in the flora has not yet been confirmed.Carboniferous plant fossils from the southern Qinling have been discovered in various regions,with a long chronological span and well-preserved specimens,providing a new and important window for revising the morphological and taxonomic understanding of Carboniferous plants,exploring the evolutionary relationships of Carboniferous plants in South and North China,and studying the Late Paleozoic plant flora evolution in China.

关 键 词：四峡口组 扇状脉植物 前华夏植物群 晚古生代 镇安盆地 

分 类 号：Q914[天文地球—古生物学与地层学]