陆相下白垩统阜新阶重新厘定及其层型剖面
投稿时间:2016-04-07  最后修改时间:2016-08-31  点此下载全文
引用本文:
DOI:
摘要点击次数: 178
全文下载次数: 
作者单位E-mail
田树刚 - 中国地质科学院地质研究所 sgtian@cags.ac.cn 
张永生 - 中国地质科学院矿产资源研究所  
李子舜 - 中国地质科学院地质研究所  
王大宁 - 中国地质科学院地质研究所  
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:实测辽宁省建昌县冰沟剖面,选择其为单位层型;开展岩石地层、多门类生物化石和沉积相分析等系统研究,重新厘定陆相阜新阶定义。建昌冰沟组主要由砾岩、砂岩、泥岩和煤层组成,分成三个岩段,第二段为煤系地层。该组为陆相湖盆扇三角洲沉积体系,相序叠置分析属砂砾坝、分流河道、泥沙坪、泥炭沼泽和洪积平原等沉积环境。通过研究以叶肢介为主的化石发生和演变序列,及综合前人研究资料,阜新阶生物地层划分包括叶肢介组合带3个、孢粉化石组合2个、双壳类组合1个和介形虫组合2个。底界层型定在小冰沟村西单一浅湖相地层中,生物标志为叶肢介Orthestheropsis originalis的始现。依据孢粉和介形虫化石资料,阜新阶对比为国际地层表早白垩世巴列姆阶(Barremian)~ 阿尔必阶(Albian)。
中文关键词:阜新阶  陆相层型 早白垩世  建昌冰沟
 
Terrestrial Fuxinian Redefinition of the Lower Cretaceousand its Strato-type Section
Abstract:Terrestrial strato-types and definitions of the Fuxinian have been stipulated by studying systematically on litho-stratigraphy, multi-category fossils and sedimentary facies, at the Binggou of Jianchang County, Liaoning Province. The Binggou Fm of the Jianchang is maily composed by conglomerates, sandstones, mudstones and coal-layers. It can be divided by three members and carries coal-layers in the 2rd member. And its facies-sequence deflects a set of lacus fan-delta sediments, i.e. sand-gravel dams, distributary channels, mud-sandy grounds, peat swamps, flood plains et al. Many bio-stratigraphic assemblages and zones have been distinguished, based on occurrences and evolutionary sequences of fossils and references of others, i.e conchostracan 3 assemblage zones, sporo-pollen 2 assemblages, bivalve 1 assemblage and ostracodan 2 assemblages. The bottom-boundary strato-type of Fuxinian has been chosen at the west-mountain of Binggou, and the fossil mark of bottom-boundary is evolutionary occurrence of conchostracan Orthestheropsis originalis Tian (sp. nov.). According to sporo-pollen and ostracodan fossils, the age of Fuxinian could be correlated to the Barremian – the Albian of the National Stratigraphy Standards.
keywords:the Fuxinian stage, the Lower Cretaceous, Terrestrial stratotype, the Binggou of Jianchang
查看全文  查看/发表评论  下载PDF阅读器
版权所有 《地球学报》编辑部 Copyright©2008 All Rights Reserved
主管单位:国土资源部 主办单位:中国地质科学院
地址: 北京市西城区百万庄大街26号,中国地质科学院东楼317室 邮编:100037 电话:010-68327396 E-mail: diqiuxb@126.com
技术支持:东方网景