Carbon isotope excursions and sea-level change: implications for the Frasnian-Famennian biotic crisis
文献类型：期刊论文
| 作者 | Chen, DZ; Tucker, ME; Shen, YN; Yans, J; Preat, A |
| 刊名 | JOURNAL OF THE GEOLOGICAL SOCIETY
 |
| 出版日期 | 2002-11-01 |
| 卷号 | 159页码:623-626 |
| 关键词 | South China Devonian mass extinction C-13 sequence stratigraphy |
| ISSN号 | 0016-7649 |
| 文献子类 | Article |
| 英文摘要 | New carbon and oxygen isotope data from carbonates spanning the Frasnian-Famennian (F-F) boundary in the Guilin area, South China, show a broad positive delta(13)C rise and fall, with sharp, short-lived negative delta(13)C events; this pattern is comparable to that in Europe and North America. The integration of the isotope stratigraphy with high-resolution sequence stratigraphy corroborates the onset of the positive delta(13)C excursion during a third-order sea-level fall in the latest Frasnian. This can best be explained through increased burial of C-org during the sea-level fall, brought about by increased organic productivity caused by increased continent-derived nutrient flux to the ocean due to enhanced weathering through the proliferation of land plants in the Devonian. This scenario would have resulted in anoxic and eutrophic conditions over epicontinental seas and blooms of cyanobacteria, creating a highly stressful and fragile ecosystem for oligotrophic normal-marine benthic organisms and leading to their massive decline. The global third-order sea-level fall near the end of the Frasnian may have led to gas hydrate dissociation (giving the negative delta(13)C events), and caused wild climatic fluctuations. The subsequent short-term events of sea-level rise, anoxia and eutrophication in the latest part of the F-F transition would have placed additional environmental stresses on the already weakened biota, leading to their further demise. |
| WOS关键词 | SOUTH CHINA ; MASS-EXTINCTION ; SEQUENCE STRATIGRAPHY ; GEOCHEMICAL EVIDENCE ; ANOXIC EVENTS ; BOUNDARY ; CANADA ; OCEANS ; OXYGEN ; BURIAL |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000179092700002 |
| 出版者 | GEOLOGICAL SOC PUBL HOUSE |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/77439]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, DZ |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Durham, Dept Geol Sci, Durham DH1 3LE, England 3.Harvard Univ, Bot Museum, Cambridge, MA 02138 USA 4.Fac Polytech Mons, B-7000 Mons, Belgium 5.Free Univ Brussels, Dept Sci Terre, B-1050 Brussels, Belgium |
| 推荐引用方式 GB/T 7714 | Chen, DZ,Tucker, ME,Shen, YN,et al. Carbon isotope excursions and sea-level change: implications for the Frasnian-Famennian biotic crisis[J]. JOURNAL OF THE GEOLOGICAL SOCIETY,2002,159:623-626. |
| APA | Chen, DZ,Tucker, ME,Shen, YN,Yans, J,&Preat, A.(2002).Carbon isotope excursions and sea-level change: implications for the Frasnian-Famennian biotic crisis.JOURNAL OF THE GEOLOGICAL SOCIETY,159,623-626. |
| MLA | Chen, DZ,et al."Carbon isotope excursions and sea-level change: implications for the Frasnian-Famennian biotic crisis".JOURNAL OF THE GEOLOGICAL SOCIETY 159(2002):623-626. |
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。