Oil residue analysis from Chandeleur Island salt marsh sediments, September 2016 to February 2017

The 2010 Deepwater Horizon (DWH) oil spill resulted in more than 3 million barrels of crude oil being delivered into the Gulf of Mexico with approximately 160,000 barrels of oil residue impacting over 1800 km of shoreline in the northern Gulf of Mexico. These data were generated to determine whether oil residues present in marsh sediments were a match for Macondo 252 (MC252) oil from the spill. Ten compound groups were analyzed and matches to MC252 oil were determined by assessing the quantitative composition of the hopane and sterane biomarker compounds. Heavily weathered oil residue was detected in November and February and was a possible match to MC252. Additional residues detected in February were a non-match to MC252, indicating that they came from a different crude oil than was spilled during the Deepwater Horizon accident.

2010年深水地平线（Deepwater Horizon, DWH）漏油事件向墨西哥湾泄漏了超过300万桶原油，约16万桶油残留物污染了墨西哥湾北部超过1800公里的岸线。本数据集的生成旨在探明沼泽沉积物中存在的油残留物是否与本次泄漏事故中的马孔多252（Macondo 252, MC252）原油相匹配。研究分析了10类化合物组分，并通过评估藿烷（hopane）与甾烷（sterane）生物标志物的定量组成，判定油残留物与MC252原油的匹配性。研究在11月与2月的样本中检测到严重风化的油残留物，其与MC252原油具有较高匹配可能性；2月还检出了其他油残留物，经判定与MC252原油不匹配，表明此类残留物源自不同于本次深水地平线事故泄漏的其他原油。