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Carbon Isotope Composition and Geochemical Features of Sediments From Gongga Mountain, China, and Potential Environmental Implications
Wu, Yingqin1; Wang, Tong2,3; Liu, Yan1; Ma, Rong1,4; Chen, Zhangxin5
2022-06-09
Source PublicationFRONTIERS IN EARTH SCIENCE
Volume10Pages:11
AbstractUsing gas chromatography-triple quadrupole tandem mass spectrometry (GC-MS/MS), the soluble organic matter was analyzed for the first time in twenty-two sediment samples from the eastern slopes of the Gongga Mountain, China, at high altitudes between 4,600 and 6,700 m. The C-11-C-33 n-alkanes and C-9-C-33 n-alkan-2-ones were identified in these samples. Both compounds were dominated by odd carbon numbers in the long-chain molecules and contained a maximum of n-C-27 or n-C-29, indicating that the sediments were predominantly of higher plant origin. However, the short-chain n-alkan-2-ones, with a maximum content of n-C-17 or i-C-18 (phytone, 6, 10, 14-trimethylpentadecan-2-one), did not show a predominance of odd and even numbers, suggesting that they were predominantly derived from bacteria and algae. Therefore, we suggest that the organic matter in Gongga Mountain comes from three sources, i.e. bacteria, algae, and higher plants. Stable carbon isotope (delta C-13) values ranged from -24.6 parts per thousand to -27.3 parts per thousand, indicating that C-3 plants were the dominant organic input to the sediments and suggesting a relatively colder and drier depositional environment. However, C-4 plants increase sharply at high altitudes of 6,300-6,600 m, suggesting that the paleoclimate of Gongga Mountain became drier and wetter with the increase of altitude.
Keywordn-alkanes n-alkan-2-ones geochemical features carbon isotope composition Gongga Mountain
DOI10.3389/feart.2022.865575
WOS KeywordN-ALKANE DISTRIBUTIONS ; ROCK-EVAL PYROLYSIS ; ORGANIC-MATTER ; SICHUAN PROVINCE ; CLIMATE-CHANGE ; SHAN RANGE ; DELTA-C-13 ; PLANTS ; LOESS ; INDICATORS
Language英语
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000814864800001
PublisherFRONTIERS MEDIA SA
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105886
Collection兰州油气中心
Corresponding AuthorWu, Yingqin; Chen, Zhangxin
Affiliation1.Chinese Acad Sci, Gansu Prov Northwest Inst Ecoenvironm & Resources, Key Lab Petr Resources, Lanzhou, Peoples R China
2.Beijing Jiaotong Univ, Sch Environm, Beijing, Peoples R China
3.Newcastle Univ, Sch Engn, Newcastle Upon Tyne, England
4.Univ Chinese Acad Sci, Beijing, Peoples R China
5.Univ Calgary, Schulich Sch Engn, Dept Chem & Petr Engn, Calgary, AB, Canada
Recommended Citation
GB/T 7714
Wu, Yingqin,Wang, Tong,Liu, Yan,et al. Carbon Isotope Composition and Geochemical Features of Sediments From Gongga Mountain, China, and Potential Environmental Implications[J]. FRONTIERS IN EARTH SCIENCE,2022,10:11.
APA Wu, Yingqin,Wang, Tong,Liu, Yan,Ma, Rong,&Chen, Zhangxin.(2022).Carbon Isotope Composition and Geochemical Features of Sediments From Gongga Mountain, China, and Potential Environmental Implications.FRONTIERS IN EARTH SCIENCE,10,11.
MLA Wu, Yingqin,et al."Carbon Isotope Composition and Geochemical Features of Sediments From Gongga Mountain, China, and Potential Environmental Implications".FRONTIERS IN EARTH SCIENCE 10(2022):11.
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