The Bakken Formation is a hydrocarbon-rich, metalliferous shale with subordinate sandstone and limestone that was deposited in the Williston Basin in Canada and the USA. Deposition of the Bakken Formation spanned the Devonian-Carboniferous boundary – a key interval in Earth's history representing profound biotic and geochemical changes in the terrestrial and marine realms, leading to deposition of metal-rich shales in the lower part of the sequence. Most studies of metal enrichment in the Bakken Formation have focused solely on the bulk rock litho-geochemistry, with little attention given to the organic matter, mineralogical, and diagenetic controls on metal sequestration and distribution.

中文翻译：

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有机质是上泥盆统黑色页岩氧化还原敏感微量元素的主要汇


巴肯组是一种富含碳氢化合物的金属页岩，其下层是砂岩和石灰岩，沉积在加拿大和美国的威利斯顿盆地。巴肯组的沉积跨越了泥盆纪-石炭纪边界，这是地球历史上的一个关键时期，代表了陆地和海洋领域深刻的生物和地球化学变化，导致了该层序下部沉积了富含金属的页岩。大多数巴肯组金属富集研究仅关注大块岩石岩石地球化学，很少关注有机质、矿物学和成岩作用对金属封存和分布的控制。