The effects of early diagenesis on the chemical and stable carbon isotopic composition of wood
The effects of early diagenesis on the chemical and stable carbon isotopic composition of wood
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DOI：
10.1016/0016-7037(87)90323-1
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发表时间：
1987-06
影响因子：
5
通讯作者：
E. C. Spiker;P. Hatcher
中科院分区：
文献类型：
--
作者：
E. C. Spiker;P. Hatcher
现代和古代埋藏木材的研究表明，碳水化合物含量与稳定的碳同位素组成之间存在线性关系，因为碳水化合物在早期成岩作用中优先降解。随着碳水化合物含量的降低，降解木材的δ13C值降低1~2个/mil，接近残留木素的值。这些结果表明，在木材的早期成岩过程中，由于木质素被选择性地保留，碳水化合物降解产物被丢失，并且没有并入芳香结构。这些结果还表明，试图根据δ13C值来量化陆地对现代沉积有机质的输入时，应考虑到退化木材的δ13C值每密尔下降1~2的可能性。
Studies of modern and ancient buried wood show that there is a linear correlation between carbohydrate content and the stable carbon isotope composition as carbohydrates are preferentially degraded during early diagenesis. As the carbohydrate content decreases, the δ 13 C value of the degraded wood decreases 1 to 2 per mil, approaching the value of the residual lignin. These results indicate that carbohydrate degradation products are lost and not incorporated into the aromatic structure as lignin is selectively preserved during early diagenesis of wood. These results also indicate that attempts to quantify terrestrial inputs to modern sedimentary organic matter based on δ 13 C values should consider the possibility of a 1 to 2 per mil decrease in the δ 13 C value of degraded wood.