Geochemical Data for Floods, Turbidites, and Droughts over the past 2000 years in the Santa Barbara Basin, CA

This dataset provides geochemical data for the Santa Barbara Basin, CA. Sediment was analyzed from sediment core SPR901-03KC, five river sites and a sediment trap. River locations correspond to the locations in Napier et al. (2019; doi:10.1130/B32035.1). The geochemical data include the δ13C, δ15N, Total Organic Carbon (TOC), Total Nitrogen (TN), molar carbon: nitrogen ratios (C/N), Mass Accumulation Rates (MAR), and n-alkane concentration by chain length. These measurements were labelled by depth in the sediment core and categorized by type of event. Event type (flood, turbidite, drought, background) were previously determined Scanning X-Ray Fluorescence (Hendy et al., 2015: doi:10.1016/j.quaint.2015.01.026). The age model for the sediment core was previously determined by Hendy et al. (2013: doi:10.1016/j.quaint.2015.01.142). This data was used to determine the impact of episodic flood, turbidite, and prolonged drought on the organic carbon burial in the Santa Barbara Basin, CA.

本数据集提供了加利福尼亚州圣巴巴拉盆地（Santa Barbara Basin）的地球化学数据。研究对沉积物岩芯SPR901-03KC、5个河流点位及1个沉积物捕集器的沉积物样品开展了分析，其中河流点位与Napier等人2019年研究（doi:10.1130/B32035.1）中的点位一致。本次检测的地球化学数据包括碳同位素δ¹³C、氮同位素δ¹⁵N、总有机碳（Total Organic Carbon, TOC）、总氮（Total Nitrogen, TN）、碳氮摩尔比（C/N）、质量沉积速率（Mass Accumulation Rates, MAR）以及不同链长的正构烷烃（n-alkane）浓度。上述测量数据以沉积物岩芯的深度进行标注，并按事件类型进行分类。事件类型（洪水、浊积事件、干旱、背景沉积）此前通过扫描X射线荧光（Scanning X-Ray Fluorescence）法确定（Hendy等，2015：doi:10.1016/j.quaint.2015.01.026）。该沉积物岩芯的年代模型此前由Hendy等人2013年构建（doi:10.1016/j.quaint.2015.01.142）。本数据集曾被用于探究间歇性洪水、浊积事件以及长期干旱对加利福尼亚州圣巴巴拉盆地有机碳埋藏过程的影响。