Source and composition of sedimentary organic matter in the head of Three Gorges Reservoir: a multiproxy approach using δ^(13)C,lignin phenols, and lipid biomarker analyses  

作　　者：He Ding Changfeng Zhu Kai Zhang Shangbin Xiao Xingqian Cui Yongge Sun 

机构地区：[1]Institute of Environment and Biogeochemistry (eBig), School of Earth Science, Zhejiang University [2]College of Hydraulic and Environmental Engineering, China Three Gorges University [3]Department of Earth, Atmospheric and Planetary Science,Massachusetts Institute of Technology

出　　处：《Acta Geochimica》2017年第3期452-455,共4页地球化学学报（英文）

基　　金：supported by the"100"talent program of Zhejiang University to D.He under the Grant No.188020*194231701/008 and188020-193810201/102;NSFC to Y.Sun under the Grant No.41372131

摘　　要：A multiproxy approach including bulk organic carbon, δ^(13) C, lignin phenols, and lipid biomarker analyses were applied to characterize the source and composition of sedimentary organic matter in the head part of Three Gorges Reservoir. OM consisted of both natural(autochthonous and allochthonous) and anthropogenic inputs.The natural OM included input from vascular plants,especially non-woody angiosperms. The allochthonous input included plankton and microbial production, likely due to localized eutrophication. Anthropogenic inputs likely derived from petroleum input and/or urban activities.Other anthropogenic inputs were untreated sewage waste.These influences were concluded to be regionally specific point sources of pollution based on relative distributions and on the fact that molecular characteristics of sedimentary OM were not distributed smoothly along a gradient.A multiproxy approach including bulk organic carbon, δ^13 C, lignin phenols, and lipid biomarker analyses were applied to characterize the source and composition of sedimentary organic matter in the head part of Three Gorges Reservoir. OM consisted of both natural（autochthonous and allochthonous） and anthropogenic inputs.The natural OM included input from vascular plants,especially non-woody angiosperms. The allochthonous input included plankton and microbial production, likely due to localized eutrophication. Anthropogenic inputs likely derived from petroleum input and/or urban activities.Other anthropogenic inputs were untreated sewage waste.These influences were concluded to be regionally specific point sources of pollution based on relative distributions and on the fact that molecular characteristics of sedimentary OM were not distributed smoothly along a gradient.

关 键 词：Three Gorges reservior Sedimentary organic matter Δ^13C Lignin phenols Lipid biomarkers 

分 类 号：X524[环境科学与工程—环境工程]