华北西部地区太原组不同古氧相遗迹化石组合特征  

Ichnoassemblage characteristics of different paleo-oxygenation facies in the Taiyuan Formation,western North China

作　　者：郑锋利 平瑞[1] 宋慧波[1,2] 胡斌 刘顺喜[1] ZHENG Fengli;PING Rui;SONG Huibo;HU Bin;LIU Shunxi(Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,Henan,China;Collaborative Innovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region of Henan Province,Jiaozuo 454000,Henan,China)

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]中原经济区煤层(页岩)气河南省协同创新中心,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2022年第5期58-67,共10页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41772104);河南省基础与前沿研究项目(162300410256);河南理工大学博士基金资助项目(B2013-075)。

摘　　要：为了深入探讨华北西部地区上石炭统-下二叠统太原组不同古氧相遗迹化石组合特征,选取河南焦作、河南禹州、山西附城和太原西山4条露头较好的太原组剖面遗迹化石为研究对象,运用遗迹学和地球化学方法对遗迹化石及其围岩进行研究,并划分出不同古氧相遗迹组合。结果表明:研究区太原组遗迹化石可划分为4种不同古氧相遗迹组合。具有红色潜穴充填物的Zoophycos-Planolites遗迹组合为贫氧相遗迹组合,产生于较闭塞海湾潟湖底部的贫氧环境;具有灰白色潜穴充填物的Zoophycos-Skolithos遗迹组合为常氧相遗迹组合,出现于浅海上部或海湾潟湖上部的常氧环境;具有灰色潜穴充填物的Zoophycos-Helminthopsis遗迹组合为弱氧相遗迹组合,形成于浅海中部的弱氧环境;Nereites-Chondrites遗迹组合为厌氧相遗迹组合,产生于浅海下部的厌氧环境。研究结果可为华北盆地太原组沉积期古环境研究及地层精细对比提供依据。Ichnofossils of the Taiyuan Formation in Jiaozuo and Yuzhou of Henan,Fucheng of Shanxi and Xishan of Taiyuan were selected as the research objects to explore the characteristics of ichnoassemblages in different paleo-oxygenation facies.Ichnofossils and their surrounding rock were studied by ichnology and geochemistry to establish ichnoassemblages of different paleo-oxygenation facies.The results showed that the ichnofossils in the Taiyuan Formation of this study area could be divided into four kinds of ichnoassem-blages which belonged to different paleo-oxygenation facies:Zoophycos with red burrow fillings-Planolites ichnoassemblage was a dysaerobic ichnoassemblage,which generated in dysaerobic environment at the bottom of a relatively occluded bay lagoon;Zoophycos with grayish-white burrow fillings-Skolithos ichnoassemblage was an aerobic ichnoassemblage,which formed in aerobic environment in an upper shallow sea or bay lagoon;Zoophycos with grey burrow fillings-Helminthopsis ichnoassemblage was a subaerobic ichnoassemblage,which occurred in subaerobic environment in the middle shallow sea;Nereites-Chondrites ichnoassemblage was an anaerobic ichnoassemblage,which formed in anaerobic environment in the lower shallow sea.The research results could provide a basis for the paleoenvironmental research and fine stratigraphic correlation of the Taiyuan Formation in the North China Basin.

关 键 词：遗迹化石 遗迹组合 古氧相 太原组 华北西部地区 

分 类 号：P53[天文地球—古生物学与地层学]