Paleoenvironmental implications of molecular and carbon isotopic distributions of n-alkanes in the hominoid-bearing upper Miocene sediments from the Zhaotong Basin, southwestern China
文献类型：期刊论文
| 作者 | Zheng, Liduan1; Huang, Xianyu6,7; Ji, Xueping3,5; Deng, Chenglong2,4 |
| 刊名 | PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
 |
| 出版日期 | 2020-04-15 |
| 卷号 | 544页码:11 |
| ISSN号 | 0031-0182 |
| 关键词 | Leaf wax Compound-specific carbon isotope Late Neogene Habitat Lignite |
| DOI | 10.1016/j.palaeo.2020.109627 |
| 英文摘要 | It is crucial to understand the relationship between hominoid primates and their living environment. Located at the southeastern margin of the Tibetan Plateau, the Shuitangba (STB) outcrop from the Zhaotong Basin is famous for bearing the remains of the youngest known ape fossil in the terminal Miocene (similar to 6.2 Ma). In this study, the molecular and carbon isotope compositions of n-alkanes, together with the loss on ignition and the bulk carbon isotope composition of total organic matter, were investigated in the STB outcrop to infer the paleoenvironmental conditions in this uppermost Miocene sedimentary sequence, with the emphasis on the habitat of the STB hominoid. In the hominoid-bearing peaty clay layer and the surrounding lignite layers, the n-alkane molecular and carbon isotope compositions support a primary contribution from terrestrial higher plants. In contrast, n-alkanes in the upper shallow lake sediments are derived from multiple origins, mainly from aquatic plants and bacteria. Both carbon preference index (CPI) and average chain length (ACL) vary closely with the lithology, but the CPI record shows the larger amplitude of change than the ACL and varies sharply during the lithological boundary. It is notable that the changes of the molecular and carbon isotope compositions of long-chain n-alkanes do not parallel with the abrupt increase of Poaceae pollen percentage during the STB hominoid appearing stage. Such an inconsistency between herb pollen percentage and n-alkane ratios may result from the different sources. Our results clearly support that these organic matter-based ratios have the potential to record the paleoenvironmental changes in ancient lacustrine sediments. |
| WOS关键词 | EARLY HUMAN HABITATS ; ENVIRONMENTAL-CHANGES ; SOUTHEASTERN MARGIN ; TIBETAN PLATEAU ; SOUTHERN CHINA ; YUANMOU BASIN ; CLIMATE ; HOLOCENE ; PEAT ; EVOLUTION |
| 资助项目 | National Natural Science Foundation of China[41830319] ; National Natural Science Foundation of China[41877317] ; Fundamental Research Funds for the Central Universities[CUGCJ1703] ; Fundamental Research Funds for the Central Universities[CUGQY1902] ; Zhaotong Government |
| WOS研究方向 | Physical Geography ; Geology ; Paleontology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000521116600003 |
| 资助机构 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Zhaotong Government ; Zhaotong Government ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Zhaotong Government ; Zhaotong Government ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Zhaotong Government ; Zhaotong Government ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Fundamental Research Funds for the Central Universities ; Zhaotong Government ; Zhaotong Government |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95484]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Huang, Xianyu |
| 作者单位 | 1.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Joint Res Ctr Human Evolut & Environm Changes Yun, Zhaotong 657000, Peoples R China 4.Univ Chinese Acad Sci, Beijing, Peoples R China 5.Yunnan Inst Cultural Rel & Archeol, Dept Paleoanthropol, Kunming 650118, Yunnan, Peoples R China 6.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430078, Peoples R China 7.China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan 430078, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zheng, Liduan,Huang, Xianyu,Ji, Xueping,et al. Paleoenvironmental implications of molecular and carbon isotopic distributions of n-alkanes in the hominoid-bearing upper Miocene sediments from the Zhaotong Basin, southwestern China[J]. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,2020,544:11. |
| APA | Zheng, Liduan,Huang, Xianyu,Ji, Xueping,&Deng, Chenglong.(2020).Paleoenvironmental implications of molecular and carbon isotopic distributions of n-alkanes in the hominoid-bearing upper Miocene sediments from the Zhaotong Basin, southwestern China.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,544,11. |
| MLA | Zheng, Liduan,et al."Paleoenvironmental implications of molecular and carbon isotopic distributions of n-alkanes in the hominoid-bearing upper Miocene sediments from the Zhaotong Basin, southwestern China".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 544(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。