Geochemical characterization of floodplain sediments from Meander C and O in the East River Watershed, CO, USA

This data package is part of the Watershed Function SFA data collection and contains geochemical characterization of sediments as a function of depth in the pumphouse vicinity, including Meander C and Meander O (oxbow). This data was used in the manuscript "Fox, P.M., Bill, M., Heckman, K., Conrad, M., Anderson, C., Keiluweit, M., and Nico, P.S.Shale as a Source of Organic Carbon in Floodplain Sediments of a Mountainous Watershed" published in Journal of Geophysical Research: Biogeosciences. Data includes sieving, total organic carbon (TOC), total inorganic carbon (TIC), total nitrogen (TN), carbon isotopes (14C and 13C) of whole sediment. Sediment density fractionation data is also included, with measurements of TOC, TN, 14C and 13C on density fractions. Metal and carbon concentrations from various sediment extractions (HCl, dithionite, oxalate, water, and pyrophosphate) are included. Characterization of extracted carbon by fourier transform infrared spectroscopy (FTIR) and UV-Visible light spectroscopy. Characterization of density fractionated (light fractions) organic carbon by FTIR. Carbon X-ray spectroscopy (C near edge X-ray absorption fine structure spectroscopy [NEXAFS] and scanning transmission X-ray microscopy [STXM]) is also included for shale samples and sediment samples. Additional acknowledgements: 1. M.K. and C.A. were supported by the Department of Energy, Office of Biological and Environmental Research, Subsurface Biosphere Research program (award no. DE-SC0016544). 2. STXM and NEXAFS data was collected at the Canadian Light Source, which is supported by the Canada Foundation for Innovation, Natural Sciences and Engineering Research Council of Canada, the University of Saskatchewan, the Government of Saskatchewan, Western Economic Diversification Canada, the National Research Council Canada, and the Canadian Institutes of Health Research. 3. Radiocarbon analysis was supported in part by the Radiocarbon Collaborative, which is jointly sponsored by the USDA Forest Service Northern Research Station, the KCCAMS Facility at UC Irvine, and Michigan Technological University.

本数据集隶属于流域功能SFA（Watershed Function SFA）数据集集合，涵盖泵房周边区域沉积物的地球化学表征数据，包含曲流C与曲流O（牛轭湖曲流）的相关样品数据。本数据集曾被用于发表于《地球物理研究杂志：生物地球科学》的论文——Fox PM、Bill M、Heckman K、Conrad M、Anderson C、Keiluweit M及Nico PS所著的《页岩作为山地流域洪泛平原沉积物中有机碳的来源》。数据集包含全沉积物的筛分测试、总有机碳（total organic carbon, TOC）、总无机碳（total inorganic carbon, TIC）、总氮（total nitrogen, TN）以及碳同位素（¹⁴C和¹³C）测定数据。此外还涵盖沉积物密度分级数据，以及各密度分级组分的TOC、TN、¹⁴C和¹³C测定结果。数据集同时包含多种沉积物萃取方式（盐酸、连二亚硫酸盐、草酸盐、水以及焦磷酸盐）下得到的金属与碳浓度数据，以及萃取态碳的傅里叶变换红外光谱（Fourier Transform Infrared Spectroscopy, FTIR）与紫外-可见光光谱表征结果，还包含密度分级得到的轻组分有机碳的FTIR表征数据。页岩样品与沉积物样品的碳X射线光谱分析数据亦被纳入本数据集，包括碳近边X射线吸收精细结构谱（near edge X-ray absorption fine structure spectroscopy, NEXAFS）与扫描透射X射线显微镜（scanning transmission X-ray microscopy, STXM）表征结果。额外致谢信息如下：1. M.K.与C.A.受美国能源部生物与环境研究办公室地下生物圈研究项目资助（项目编号：DE-SC0016544）。2. STXM与NEXAFS数据采集于加拿大光源，该设施由加拿大创新基金会、加拿大自然科学与工程研究理事会、萨斯喀彻温大学、萨斯喀彻温省政府、加拿大西部经济多元化局、加拿大国家研究委员会及加拿大卫生研究院联合资助。3. 放射性碳分析工作部分由放射性碳协作项目资助，该项目由美国农业部林务局北方研究站、加州大学欧文分校KCCAMS实验室与密歇根理工大学联合发起。