Geochemical characteristics and geological significance of chert nodules in Qixia formation, Pingding Mountain, lower Yangtze Plate
文献类型：期刊论文
| 作者 | Li, Jun; Chen, Lu-wang; Hao, Chun-ming; Zhang, Jie; Chen, Song; Gui, He-rong |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2021 |
| 卷号 | 18期号:1页码:88-100 |
| 关键词 | Cherts nodule Geochemistry Siliceous limestone Pingding Mountain Depositional environment Silica source |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-020-5982-x |
| 英文摘要 | The Permian is an important period for the deposition of siliceous rocks on a global scale, but the genesis of chert is still controversial. To better understand the mechanism of chert nodules deposition from Qixia Formation (P-1q) (Lower Yangtze Plate, China), we analyzed the major, trace and rare earth elements of these chert nodule samples (CN) and surrounding rock samples (SR) using Inductively Coupled Plasma Mass Spectrometry (ICP-MS) and X-ray fluorescence (XRF) technique. The redox state, siliceous sources and depositional environment analysis show that CN have higher contents of SiO2, Fe2O3 and MnO comparing with SR, and their geochemical properties are different. Trace and rare earth elements characteristics reveal that nodules were deposited under the action of biochemistry in the basin, no terrigenous materials contamination was observed and the contribution of upwelling was emphasized. The Al/(Al+Fe+Mn), Fe/Ti and Al-Fe-Mn discrimination diagram indicated the chert nodules are influenced by hydrothermal action. Evidence from redox-sensitive elements such as Th, U, V and Sc suggests that nodules were deposited in a reducing environment. In the convective mixing of hydrothermal action and normal seawater, excessive dissolved silicon and nutrients are absorbed and precipitated by biological action, and then transported by upwelling to shallow water for deposition. All the evidence comes from the trace elements enrichment characters, Rare earth elements and Y (REY) distribution patterns and La/La*, Ce/Ce*, Eu/Eu*, LREE/HREE, Y/Ho and sigma REE characteristics. |
| 语种 | 英语 |
| WOS记录号 | WOS:000607413000006 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/57149]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2021_Vol18 No.1 |
| 推荐引用方式 GB/T 7714 | Li, Jun,Chen, Lu-wang,Hao, Chun-ming,et al. Geochemical characteristics and geological significance of chert nodules in Qixia formation, Pingding Mountain, lower Yangtze Plate[J]. JOURNAL OF MOUNTAIN SCIENCE,2021,18(1):88-100. |
| APA | Li, Jun,Chen, Lu-wang,Hao, Chun-ming,Zhang, Jie,Chen, Song,&Gui, He-rong.(2021).Geochemical characteristics and geological significance of chert nodules in Qixia formation, Pingding Mountain, lower Yangtze Plate.JOURNAL OF MOUNTAIN SCIENCE,18(1),88-100. |
| MLA | Li, Jun,et al."Geochemical characteristics and geological significance of chert nodules in Qixia formation, Pingding Mountain, lower Yangtze Plate".JOURNAL OF MOUNTAIN SCIENCE 18.1(2021):88-100. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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