中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
Geochemical changes across the Ordovician-Silurian transition on the Yangtze Platform, South China

文献类型：期刊论文

作者Yan DeTian1,2; Chen DaiZhao2; Wang QingChen2; Wang JianGuo2
刊名SCIENCE IN CHINA SERIES D-EARTH SCIENCES
出版日期2009
卷号52期号:1页码:38-54
关键词rare earth elements trace elements paleo-redox proxies mass extinction Ordovician-Silurian boundary Yangtze Platform
ISSN号1006-9313
DOI10.1007/s11430-008-0143-z
文献子类Article
英文摘要The trace element and rare earth element (REE) variations across the Ordovician-Silurian succession are presented from two outcrop sections on the Yangtze Platform: the Nanbazi section, Guizhou Province, deposited in a shallow platform interior setting, and the Wangjiawan section, Hubei Province, deposited in a deeper basinal environment. Geochemical analysis of closely spaced samples through three intervals, the Wufeng, Guanyinqiao and Longmaxi, revealed vast palaeoceanographic changes. Some geochemical proxies, including Th/U, Ni/Co, V/Cr, and V/(V+Ni) ratios, together with sedimentary facies and biotic data, indicate that an anoxic condition on the most of the Yangtze Platform during the Wufeng and Longmaxi intervals, but an oxic condition during the Guanyinqiao time. The shift of the anoxic to the oxic environment during the Guanyinqiao time coincided with a global sea-level lowstand, in parallel with the global glaciation. The Longmaxian anoxic environment was a result of a global sea-level rise, which may be synchronized with a mainly catastrophic event in the latest Ordovician. Although the two sections generally show similar variation patterns of trace and REE concentrations and some element ratios, a minor difference occurs between the Wangjiawan and Nanbazi sections, likely reflecting a difference in depositional setting during the accumulation. Such an oceanic oxygen-level variation may add a useful constraint to the current arguments on the cause and consequence of the latest Ordovician mass extinction.
WOS关键词RARE-EARTH-ELEMENTS ; DEPOSITIONAL ENVIRONMENT ; HIRNANTIAN GLACIATION ; SEDIMENTARY-ROCKS ; MASS EXTINCTION ; OCEANIC ANOXIA ; SHALES ; SEA ; USA ; PROVENANCE
WOS研究方向Geology
语种英语
WOS记录号WOS:000264953000005
出版者SCIENCE PRESS
资助机构National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101) ; National Basic Research Program of China(2005CB422101)
源URL[http://ir.iggcas.ac.cn/handle/132A11/71864]  
专题中国科学院地质与地球物理研究所
通讯作者Yan DeTian
作者单位1.China Univ Geosci, Key Lab Tecton & Petr Resources, Minist Educ, Wuhan 430074, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Yan DeTian,Chen DaiZhao,Wang QingChen,et al. Geochemical changes across the Ordovician-Silurian transition on the Yangtze Platform, South China[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2009,52(1):38-54.
APA Yan DeTian,Chen DaiZhao,Wang QingChen,&Wang JianGuo.(2009).Geochemical changes across the Ordovician-Silurian transition on the Yangtze Platform, South China.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,52(1),38-54.
MLA Yan DeTian,et al."Geochemical changes across the Ordovician-Silurian transition on the Yangtze Platform, South China".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 52.1(2009):38-54.

入库方式： OAI收割

来源：地质与地球物理研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。