The study of Early Mesoproterozoic variegated shales in the southern North China Craton and its paleoenvironmental implications
文献类型：期刊论文
| 作者 | Zuo PengFei3,4; Zhu XiYan2; Zheng DeShun4; Sun FengBo4; Wang ShiYan1 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 38期号:6页码:1713-1726 |
| ISSN号 | 1000-0569 |
| 关键词 | Black shales North China Craton Mesoproterozoic Oxygenation event |
| DOI | 10.18654/1000-0569/2022.06.11 |
| 英文摘要 | The evolution of oxygen-increasing is one of the most significant events in the history of the Earth. It is controversial if there are variable oxygen levels in Proterozoic. Fine-grained sedimentary rocks, which record the redox state of the ocean sensitively, can be used in constraining the oxygen levels. A series of shales in the North China Craton ( NCC ) were deposited in extension environments after 1800Ma. Variegated shales, from the black shales in a shelf-neritic environment ( ca. 1648Ma) , were carried out in mineralogy and geochemistry study. Scanning electron microscope and X-ray diffraction ( XRD) show purplish-red and dark-green flaky shales mainly consist of illite, quartz and K-feldspar. Hematite distributes in biotite and chlorite and indicates its alteration genesis. Illite occurs as fibrous within intergranular pore among detrital K-feldspar, quartz and muscovite. Illite consists of 1M polytype suggesting very low- to low-grade metamorphism. The Chemical Index of Alteration ( CIA) indicates intense weathering during the deposition of the shales. Compared with Post-Archean Australian Shales ( PAAS) , there is a slight enrichment in HREE, depletion in LREE and positive Eu anomalies. It is noted that enrichment of total iron has not been observed in the shales more than that of the PAAS and North America Shales ( NASC) and, by extension, implying no anoxia. Transition trace elements ( V, Cr, Co and Ni) show oxidized water column. It is reasonable to infer that neritic-shelf seawater has been oxidized in combination with a stratified model of the Mesoproterozoic Ocean. Meanwhile, contemporaneous clay and shale deposits also indicate intense weathering worldwide and it could be related to variable oxygen contents. |
| WOS关键词 | GEOCHEMISTRY |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000826244200011 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/108461]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Zuo PengFei |
| 作者单位 | 1.Henan Inst Geol Survey, Zhengzhou 450001, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China 4.Henan Polytech Univ, Sch Resources & Environm, Jiaozuo 454000, Henan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zuo PengFei,Zhu XiYan,Zheng DeShun,et al. The study of Early Mesoproterozoic variegated shales in the southern North China Craton and its paleoenvironmental implications[J]. ACTA PETROLOGICA SINICA,2022,38(6):1713-1726. |
| APA | Zuo PengFei,Zhu XiYan,Zheng DeShun,Sun FengBo,&Wang ShiYan.(2022).The study of Early Mesoproterozoic variegated shales in the southern North China Craton and its paleoenvironmental implications.ACTA PETROLOGICA SINICA,38(6),1713-1726. |
| MLA | Zuo PengFei,et al."The study of Early Mesoproterozoic variegated shales in the southern North China Craton and its paleoenvironmental implications".ACTA PETROLOGICA SINICA 38.6(2022):1713-1726. |
入库方式： OAI收割
来源：地质与地球物理研究所
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