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新疆西准噶尔洪古勒楞组与泥盆系-石炭系界线新知
投稿时间:2019-07-03  修订日期:2019-08-25  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2020018
摘要点击次数: 175
全文下载次数: 122
作者单位E-mail
纵瑞文 中国地质大学武汉生物地质与环境地质国家重点实验室 zong_1658@126.com 
王志宏 中国地质调查局武汉地质调查中心  
范若颖 中国地质大学(武汉)地球科学学院  
宋俊俊 中国科学院南京地质古生物研究所  
张欣松 中国地质大学武汉生物地质与环境地质国家重点实验室  
申震 中国地质大学武汉生物地质与环境地质国家重点实验室  
龚一鸣 中国地质大学武汉生物地质与环境地质国家重点实验室 ymgong@cug.edu.cn 
基金项目:本文为国家自然科学基金项目(41702006, 41872034, 41290260)、中国科学院资源地层学与古地理学重点实验室(中国科学院南京地质古生物研究所)开放课题(2017KF05)和中国博士后基金(2017M620342)
中文摘要:通过对西准噶尔地区洪古勒楞组多条剖面的综合研究,提出洪古勒楞组与上覆黑山头组以钙质碎屑岩的消失、暗色细火山碎屑岩的出现为界,其顶界为一套近岸浅水沉积的碎屑岩(含舌形贝的钙质粉砂岩、凝灰质砂岩、细砾岩或含介壳的砂砾岩),称之为“杨庄砂岩”,该界线在多条剖面上易于识别和对比。在洪古勒楞组上部和黑山头组下部发现三叶虫9属(亚属)14种:Omegops sp., Pudoproetus sp.,Linguaphillipsia? sp.,Belgibole sp.,B. abruptirhachis,Philliboloides sp.,Winterbergia (W.) sp.,W. (Eowinterbergia)? sp.,Weberiphillipsia sp.,Conophillipsia sp.1,C. sp.2,C.? sp.3,C.? paucicostata,C.? morganensis。根据三叶虫生物地层学研究,认为西准噶尔地区存在泥盆系-石炭系界线,界线位置在Omegops的消失层位和Belgibole-Conophillipsia组合带的出现层位之间,该界线与洪古勒楞组和黑山头组之间的界线基本一致。洪古勒楞组顶部的“杨庄砂岩”是泥盆纪末期海平面下降事件在西准噶尔火山岛弧背景下的沉积产物,也是泥盆纪-石炭纪之交Hangenberg事件在西准噶尔地区的体现。
中文关键词:洪古勒楞组  泥盆系-石炭系界线  三叶虫  Hangenberg事件  黑山头组  西准噶尔
 
New Knowledge on the Hongguleleng Formation and Devonian-Carboniferous boundary in western Junggar, Xinjiang
Author NameAffiliationE-mail
zongruiwen State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences zong_1658@126.com 
WANG Zhihong Wuhan Center of China Geological Survey  
FAN Ruoying School of Earth Sciences, China University of Geosciences  
SONG Junjun Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences  
ZHANG Xinsong State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences  
SHEN Zhen State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences  
GONG Yiming State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences ymgong@cug.edu.cn 
Abstract:Based on the comprehensive research on several sections of the Hongguleleng Formation in western Junggar, the boundary between the Hongguleleng Formation and Heishantou Formation was proposed at the disappearance of calcareous clastic rocks and the appearance of dark fine-grained volcaniclastic rocks. The uppermost part of the Hongguleleng Formation is a suite of clastic rocks (calcareous siltstones with ‘Lingula’, tuffaceous sandstones, granule conglomerates, or sandy conglomerates with shells) deposited in the backshore environment, which is named the “Yangzhuang Sandstone”. The boundary between the two formations can be easily identified and correlated in many stratal sections. Nine genera (or subgenera) and 14 species of trilobites were collected from the upper part of the Hongguleleng Formation and the lower part of the Heishantou Formation, including Omegops sp., Pudoproetus sp., Linguaphillipsia? sp., Belgibole sp., B. abruptirhachis, Philliboloides sp., Winterbergia (W.) sp., W. (Eowinterbergia)? sp., Weberiphillipsia sp., Conophillipsia sp.1, C. sp.2, C.? sp.3, C.? paucicostata, and C.? morganensis. According to the biostratigraphy of trilobites, the Devonian-Carboniferous boundary was established in western Junggar; it is placed between the disappearance level of Omegops and the appearance level of the Belgibole-Conophillpsia assemblage zone. The Devonian-Carboniferous boundary is accordance with the boundary between the Hongguleleng Formation and Heishantou Formation. The “Yangzhuang Sandstone” resulted from a sea-level fall event which happened at the end of Devonian in the island-arc context, and it is also the embodiment of the Hangenberg event during the Devonian-Carboniferous transition in western Junggar.
keywords:Hongguleleng Formation  Devonian-Carboniferous boundary  Trilobite  Hangenberg event  Heishantou Formation  Western Junggar
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