In this study, low temperature (room temperature, 400°C LT) and high temperature (400–900°C HT) of bulk organic carbon samples were dated from two loess and paleosol profiles. The results showed that radiocarbon (14C) dates of the LT were younger than HT fractions, indicating effect of younger contamination from overlying layers. The δ13C variation of the HT fraction appears to respond much more sensitively to climate change, and 14C ages of HT fraction can produce reasonable 14C ages from a younger layer, but it is very difficult to obtain reliable 14C ages from older layer as a result of uncomplete removal of young carbon.

中文翻译：

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黄土-古土壤沉积物中的阶梯燃烧 14C 测年

在这项研究中，大块有机碳样品的低温（室温，400°C LT）和高温（400-900°C HT）来自两个黄土和古土壤剖面。结果表明，放射性碳（14C) LT 的日期比 HT 分数更年轻，表明来自覆盖层的年轻污染的影响。δ13HT 分数的 C 变化似乎对气候变化的反应更加敏感，并且14HT分数的C年龄可以产生合理的14C从较年轻的层开始老化，但很难获得可靠的14由于未完全去除年轻碳，C 从较旧的层老化。