Retene and dehydroabietic acid methyl ester (DAME) are biomarkers linked mostly to terrigenous organic matter. However, their aquatic origin from algae and/or cyanobacteria has been discussed in the past few years. The complex origin of retene and DAME can lead to misinterpretation during biomarker interpretation, which can be minimalised with the support of isotopic analyses. This study contains the results of thirty-two compound-specific isotope analyses (CSIA) of δ13C performed on retene and forty-six CSIA analyses of δ13C performed on DAME. Obtained δ13C results were compared with simple biomarker results to tie isotopic data with the origin of organic matter. Pure aquatic retene and DAME were present within the Middle Cambrian and Early Ordovician samples, as the first appearance of plants was noted in the Middle Ordovician.

中文翻译：

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陆源还是非陆源？δ13C 揭示了 retene 和脱氢枞酸甲酯的来源


Retene 和脱氢枞酸甲酯 （DAME） 是主要与陆源有机物相关的生物标志物。然而，在过去的几年里，人们已经讨论了它们来自藻类和/或蓝藻的水生来源。retene 和 DAME 的复杂来源会导致生物标志物解释过程中的误解，在同位素分析的支持下，可以最大限度地减少这种误解。本研究包含对 retene 进行的 32 次 δ13C 化合物特异性同位素分析 （CSIA） 和对 DAME 进行的 46 次 δ13C CSIA 分析的结果。将获得的 δ13C 结果与简单的生物标志物结果进行比较，以将同位素数据与有机物的来源联系起来。纯水生 retene 和 DAME 存在于中寒武世和早奥陶世样本中，因为植物的首次出现是在中奥陶世观察到的。