全文快速搜索:          
引用本文:陈孝红 危 凯 张保民 程 龙. 贵州关岭下三叠统永宁镇组碳同位素化学地层与海洋氧化事件[J]. 中国地质, 2013, 40(5): 1466-1473.
CHEN Xiao-hong, WEI Kai , ZHANG Bao-ming, CHENG Long. Carbon isotope chemo-stratigraphy and ocean oxidation event in the Lower Triassic Yongningzhen Formation of Guanling, Guizhou Province[J]. Geology in China, 2013, 40(5): 1466-1473(in Chinese with English abstract).
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1829次   下载 2194 本文二维码信息
码上扫一扫!
分享到: 微信 更多
贵州关岭下三叠统永宁镇组碳同位素化学地层与海洋氧化事件
陈孝红 危 凯 张保民 程 龙
武汉地质矿产研究所, 湖北 武汉430205
摘要:
提要:贵州关岭永宁镇下三叠统上部永宁镇组碳同位素化学地层及其对比研究表明早三叠世晚期特提斯洋曾发生了稳定碳同位素组成(δ13C)的强烈波动,且这一δ13C波动具有分布广泛和不受沉积相控制的特点。笔者分析和讨论了永宁镇组碳同位素化学地层与岩石地层、生物地层、层序地层和微量元素地球化学特征的关系,指出特提斯地区下三叠统上部地层碳同位素组成受全球海平面变化、洋流循环模式和生物复苏等多因素的共同影响,早三叠世晚期δ13C的强烈正异常是洋流循环模式改变引起大洋氧化和与此相关的生物复苏的结果。
关键词:  碳同位素化学地层  大洋氧化事件  永宁镇组  早三叠世  贵州
DOI:
分类号:
基金项目:中国地质调查局“关岭生物群特征及环境演化”项目(1212010611603)资助。
Carbon isotope chemo-stratigraphy and ocean oxidation event in the Lower Triassic Yongningzhen Formation of Guanling, Guizhou Province
CHEN Xiao-hong, WEI Kai , ZHANG Bao-ming, CHENG Long
Wuhan Institute of Geology and Mineral Resources, Wuhan 430205, Hubei, China
Abstract:
Abstract:High-resolution carbon isotope measurements of the upper Lower Triassic Yongningzhen Formation in Yongningzhen section of Guanling in Guizhou Province in correlation with contemporaneous strata in the world demonstrate that there is a pronounced carbon isotopic excursion characterized by wide distribution and unrestricted by sedimentary environment in the late Early Triassic of Tethys. The relationships of carbon chemo-stratigraphy to lithostratigraphy, biostratigraphy, sequence stratigraphy and trace element geochemistry of the Yongningzhen Formation are discussed in this paper. It is suggested that the δ13C variability of Tethys Ocean in the late Early Triassic was affected by global sea level change, oceanic circulation and biotic recovery as well as some other factors, and that a considerable δ13C positive excursion resulted from a extensive ocean oxidation caused by significant modification of oceanic circulation and biotic recovery related to the ocean oxidation event at that time.
Key words:  carbon isotope chemostratigraphy  ocean oxidation  Yongningzhen Formation  Early Triassic  Guizhou