δ<sup>13</sup>C values and hydrogen index records in sediment organic matter of RH core

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Total organic carbon (TOC) content correlates very well with hydrogen index (HI) in the sedi-ments of RH core in the Zoig Basin.And the δ<sup>13</sup>C values of TOC become more positive while both TOCcontent and HI decline,indicating the suba
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