Reconstruction of paleoceanic redox conditions of the lower Cambrian Niutitang shales in northern Guizhou, Upper Yangtze region
文献类型：期刊论文
| 作者 | Wu, Chenjun1,3; Zhang, Leifu2; Zhang, Tongwei1; Tuo, Jincai3; Song, Dongjun3; Liu, Yan3; Zhang, Mingfeng3; Xing, Lantian3 |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2020-01-15 |
| 卷号 | 538页码:11 |
| ISSN号 | 0031-0182 |
| 关键词 | Niutitang Formation Organic-rich shales Stratigraphic correlation Paleoredox conditions Organic-matter richness |
| DOI | 10.1016/j.palaeo.2019.109457 |
| 英文摘要 | The paleoceanic redox conditions and the vertical and spatial distribution of organic-matter-rich lower Cambrian Niutitang shales are varied in the Upper Yangtze region, China. An integrated approach, including organic geochemistry, major and trace elemental geochemistry, and X-ray diffraction (XRD) mineralogy, was used to characterize changes in redox conditions and to determine key controls on organic-matter accumulation during deposition of the lower Cambrian Niutitang shales. A 202-m-long cored well located in Kaiyang County in northern Guizhou, China, was thoroughly characterized by the integrated approach in this study. Vertically, total organic carbon (TOC-) rich siliceous and argillaceous black shales were developed in the Lower and Middle Niutitang Formation, and TOC-lean silty shales were found in the Upper Niutitang Formation. The TOC content in the Lower and Middle Niutitang shales ranges from 0.27% to 6.7%, with an average value of 2.1%, and it decreases from 0.30% to 0.11% in the Upper Niutitang Formation shales. The TOC-rich siliceous shales in the Lower Niutitang Formation were characterized by high total sulfur content, enrichment in redox-sensitive trace elements, high C-org:P ratios, and high authigenic Mo-U covariation, indicating they were deposited under persistent anoxic conditions. Most organic-rich shales from the Middle Niutitang Formation were deposited under anoxic conditions, whereas a few intervals having low TOC contents were deposited in a predominantly oxic depositional environment. In contrast, the Upper Niutitang Formation were deposited under fully oxic conditions. A combination of high primary productivity and enhanced organic preservation under euxinic water column conditions is the key control on organic-matter accumulation in the Lower Niutitang Formation shales. However, a coupling of redox depositional environment and terrestrial mineral dilution plays an important role in organic-matter accumulation and preservation in the Middle Niutitang Formation. Similar organic-matter abundance distribution and carbon isotope excursion of organic matter in the sediments deposited at different depositional facies on the Yangtze Platform suggest regional isotopically homogenous organic carbon input due to the widespread transgressive event with deep basinal waters being transported into the shallow shelf environments at the base of the lower Cambrian. As a result, delta C-13(org) distribution patterns can be used as a stratigraphic correlation marker in the Upper Yangtze region. |
| WOS关键词 | ORGANIC-MATTER ACCUMULATION ; EARTH-ELEMENT GEOCHEMISTRY ; CARBON-RICH SEDIMENTS ; SOUTH CHINA ; BLACK SHALE ; ISOTOPE STRATIGRAPHY ; APPALACHIAN BASIN ; MARINE-SEDIMENTS ; GAS SYSTEMS ; PLATFORM |
| 资助项目 | National Natural Science Foundation of China[41602151] ; National Natural Science Foundation of China[41672127] ; National Natural Science Foundation of China[41730421] ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu Province[1309RTSA041] |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000508751800006 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; CAS "Light of West China" Program ; CAS "Light of West China" Program ; Key Laboratory Project of Gansu Province ; Key Laboratory Project of Gansu Province |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95657]  |
| 专题 | 地质与地球物理研究所_兰州油气中心 |
| 通讯作者 | Tuo, Jincai |
| 作者单位 | 1.Univ Texas Austin, Bur Econ Geol, Austin, TX 78713 USA 2.PetroChina Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Chenjun,Zhang, Leifu,Zhang, Tongwei,et al. Reconstruction of paleoceanic redox conditions of the lower Cambrian Niutitang shales in northern Guizhou, Upper Yangtze region[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,538:11. |
| APA | Wu, Chenjun.,Zhang, Leifu.,Zhang, Tongwei.,Tuo, Jincai.,Song, Dongjun.,...&Xing, Lantian.(2020).Reconstruction of paleoceanic redox conditions of the lower Cambrian Niutitang shales in northern Guizhou, Upper Yangtze region.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,538,11. |
| MLA | Wu, Chenjun,et al."Reconstruction of paleoceanic redox conditions of the lower Cambrian Niutitang shales in northern Guizhou, Upper Yangtze region".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 538(2020):11. |
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。