Chandeleur Islands radiochemistry data from USGS field activities 12BIM01, 12BIM02, and 12BIM05

Scientists from the U.S. Geological Survey (USGS), St. Petersburg Coastal and Marine Science Center (SPCMSC) conducted a time-series collection of shallow sediment cores from the back-barrier environments along the Chandeleur Islands, Louisiana from March 2012 through July 2013. The sampling efforts were part of a larger USGS study to evaluate the effects on the geomorphology of the Chandeleur Islands following the construction of an artificial sand berm in response to the Deep Water Horizon oil spill. The objective of this study was to evaluate the response of the back-barrier tidal and wetland environments to the berm. This report serves as an archive for sedimentological, radiochemical, and microbiological data derived from the sediment cores. Data is available for a time-series of four sampling periods: March 2012, July 2013, September 2012, and July 2013. Data is available in downloadable spreadsheet, Joint Photographic Experts Group and Portable Document File formats. Additional files included: ArcGIS shape files of the study sites, detailed results of sediment grain size analyses, and formal Federal Geographic Data Committee (FDGC) metadata.美国地质调查局（U.S. Geological Survey, USGS）与圣彼得堡海岸与海洋科学中心（St. Petersburg Coastal and Marine Science Center, SPCMSC）的科研人员，于2012年3月至2013年7月间，在路易斯安那州尚德勒尔群岛（Chandeleur Islands）的障壁后环境开展了浅海沉积物岩心的时序采集工作。此次采样属于美国地质调查局一项大型研究的组成部分，该研究旨在评估“深水地平线”漏油事件后修建人工沙堤对尚德勒尔群岛地貌形态的影响。本研究的核心目标为解析障壁后潮汐与湿地环境对该人工沙堤的响应特征。 本报告作为本次沉积物岩心所获沉积物学、放射化学与微生物学数据的存档载体。本次公开的数据涵盖四个采样时段的时序序列：2012年3月、2012年9月、2013年7月、2013年7月。数据可通过可下载电子表格、联合图像专家组（Joint Photographic Experts Group, JPEG）及可移植文档格式（Portable Document File, PDF）获取。附加文件包括：研究区域的ArcGIS形状文件、沉积物粒度分析详细结果，以及正式的联邦地理数据委员会（Federal Geographic Data Committee, FGDC）元数据。