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Paleoenvironmental implications of molecular and carbon isotopic distributions of n-alkanes in the hominoid-bearing upper Miocene sediments from the Zhaotong Basin, southwestern China
Zheng, Liduan1; Huang, Xianyu2,3; Ji, Xueping4,5; Deng, Chenglong6,7
2020-04-15
Source PublicationPALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN0031-0182
Volume544Pages:11
AbstractIt 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.
KeywordLeaf wax Compound-specific carbon isotope Late Neogene Habitat Lignite
DOI10.1016/j.palaeo.2020.109627
Funding OrganizationNational 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
WOS KeywordEARLY HUMAN HABITATS ; ENVIRONMENTAL-CHANGES ; SOUTHEASTERN MARGIN ; TIBETAN PLATEAU ; SOUTHERN CHINA ; YUANMOU BASIN ; CLIMATE ; HOLOCENE ; PEAT ; EVOLUTION
Language英语
Funding ProjectNational 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
Funding OrganizationNational 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
WOS Research AreaPhysical Geography ; Geology ; Paleontology
WOS SubjectGeography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS IDWOS:000521116600003
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95484
Collection岩石圈演化国家重点实验室
Corresponding AuthorHuang, Xianyu
Affiliation1.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China
2.China Univ Geosci, Sch Geog & Informat Engn, Hubei Key Lab Crit Zone Evolut, Wuhan 430078, Peoples R China
3.China Univ Geosci, State Key Lab Biogeol & Environm Geol, Wuhan 430078, Peoples R China
4.Yunnan Inst Cultural Rel & Archeol, Dept Paleoanthropol, Kunming 650118, Yunnan, Peoples R China
5.Joint Res Ctr Human Evolut & Environm Changes Yun, Zhaotong 657000, Peoples R China
6.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
7.Univ Chinese Acad Sci, Beijing, Peoples R China
Recommended Citation
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.
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