Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31458.1 |
Latest Permian to Middle Triassic redox condition variations in ramp settings, South China: Pyrite framboid evidence | |
Huang, Yuangeng1; Chen, Zhong-Qiang1; Wignall, Paul B.2; Zhao, Laishi3 | |
2017 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China; England |
英文摘要 | A detailed, 10 m.y. redox history of Changhsingian to Anisian (latest Permian to Middle Triassic) oceans in ramp settings is reconstructed based on framboidal pyrite analysis from South China. The result shows that the well-established phenomenon of intense ocean euxinia-anoxia is faithfully recorded in pyrite framboid data. Three major euxinia-anoxia episodes, namely, the end-Changhsingian to end-Smithian, middle to late Spathian, and early to middle Anisian, have been recognized from the ramp successions. The first reducing episode is subdivided into four subepisodes: Permian-Triassic boundary, Griesbachian-Dienerian boundary, earliest Smithian, and end-Smithian. Redox variations broadly track other oceano-graphic proxies. Euxinia-anoxia episodes coin-cide with positive excursions of conodont Omega Ce anomalies, negative excursions of delta S-34(cas) (carbonate-associated sulfate), increases in sea-surface temperature, and negative excursions of delta C-13 in most cases. However, euxinia-anoxia near the Dienerian-Smithian boundary coincided with positive excursions of d13C and a general cooling - period. This exception may be the result of locally developed water-column anoxia. The Permian-Triassic boundary subepisode witnessed two ephemeral euxinia-anoxia events separated by a dysoxic to oxic period. The former, together with a rapid increase in sea-surface temperature (up to 8 degrees C), may have been responsible for the biodiversity crisis, while the latter anoxic event destroyed ecosystem trophic structures. In addition to the Permian-Triassic boundary euxiniaanoxia event, which spread over habitats in all oceans, the Spathian and Anisian euxinia-anoxia episodes also prevailed in global oceans. Variation of the oxygen minimum zone are suggested as the driving mechanism that facilitated the movement of oxygen-poor water columns in various paleogeographic settings over this critical period. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000390988400015 |
WOS关键词 | MASS EXTINCTION ; ISOTOPIC EVIDENCE ; MEISHAN SECTION ; OCEANIC ANOXIA ; 2 EPISODES ; CONODONT BIOSTRATIGRAPHY ; NANPANJIANG BASIN ; SEAWATER SULFATE ; ANHUI PROVINCE ; MARINE CRISIS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24589 |
专题 | 地球科学 |
作者单位 | 1.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430074, Peoples R China; 2.Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England; 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China |
推荐引用方式 GB/T 7714 | Huang, Yuangeng,Chen, Zhong-Qiang,Wignall, Paul B.,et al. Latest Permian to Middle Triassic redox condition variations in ramp settings, South China: Pyrite framboid evidence[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Huang, Yuangeng,Chen, Zhong-Qiang,Wignall, Paul B.,&Zhao, Laishi.(2017).Latest Permian to Middle Triassic redox condition variations in ramp settings, South China: Pyrite framboid evidence.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Huang, Yuangeng,et al."Latest Permian to Middle Triassic redox condition variations in ramp settings, South China: Pyrite framboid evidence".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
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