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During IODP Expedition 302 (Arctic Coring Expedition—ACEX), the first scientific drilling campaign in the permantly ice-covered central Arctic Ocean, a 430m thick sequence of upper Cretaceaous to Quaternary sediments has been drilled. The lower half of this sequence is composed of organic-carbon-rich (black shale-type) sediments with total organic carbon contents of about 1–14%. Significant amounts...
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