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. Update 11/06/2019: An .kml file was added with the GPS locations for all the sampling sites.

本数据包隶属于流域功能SFA数据集合集，涵盖泵房周边区域（含曲流C与曲流O（牛轭湖曲流））沉积物的地球化学表征数据，表征参数随深度变化。本数据集曾用于发表于《地球物理研究杂志：生物地球科学》（*Journal of Geophysical Research: Biogeosciences*）的论文《Fox, P.M.、Bill, M.、Heckman, K.、Conrad, M.、Anderson, C.、Keiluweit, M. 与 Nico, P.S.：页岩作为山地流域泛滥平原沉积物中有机碳的来源》。
数据集包含以下内容：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与¹³C）测定数据；沉积物密度分级分离数据，以及密度分级组分中的TOC、TN、¹⁴C和¹³C测试结果；多种沉积物萃取（盐酸、连二亚硫酸钠、草酸、去离子水以及焦磷酸钠）得到的金属与碳浓度数据；采用傅里叶变换红外光谱（Fourier Transform Infrared Spectroscopy, FTIR）与紫外-可见光谱对萃取碳组分的表征数据；采用FTIR对密度分级分离得到的轻组分有机碳的表征数据；以及页岩样品与沉积物样品的碳X射线光谱数据，具体包括碳近边X射线吸收精细结构光谱（Carbon 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）测试结果。
附加致谢信息如下：
1. M.K.与C.A.得到美国能源部生物与环境研究办公室地下生物圈研究计划资助（项目编号DE-SC0016544）。
2. STXM与NEXAFS数据采集于加拿大光源（Canadian Light Source），该机构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署、加拿大国家研究委员会以及加拿大卫生研究院联合资助。
3. 放射性碳分析得到了放射性碳协作计划（Radiocarbon Collaborative）的部分资助，该计划由美国农业部林务局北方研究站、加州大学欧文分校KCCAMS实验室以及密歇根理工大学联合发起。
2019年11月6日更新：新增包含所有采样点GPS坐标的.kml文件。