During the archaeological excavations in the Byzantine Theodosian harbor (Istanbul) a Holocene dark gray to black clay sequence was uncovered. This clay unit was deposited under anoxic conditions in a small swamp. Both wooden artifacts from the Neolithic period, but also dispersed organic matter were perfectly preserved within this sequence. The aim of this study was the assessment of environmental changes and anthropogenic impacts with the help of organic geochemical and isotopic characterization of organic matter in this clay unit. The age model, based on ¹⁴C data, showed that the clay was deposited during a period about from 11,100 to 7500 cal. years BP. Hydrogen Index values lower than 100 mgHC/gTOC, n-alkane distributions with maxima at nC₂₉ or at nC₃₁, a predominance of long-chain n-alkanes (C₂₅–C₃₃) and δ¹³C_org values around −24‰ to −27‰ suggest a predominantly terrestrial origin of organic matter from C₃ plants. Obvious excursions of bulk δ¹³C_org and compound-specific δ¹³C and δD values of nC₂₇, nC₂₉, nC₃₁, and nC₃₃ are interpreted as indicators of changes in environmental and climatic conditions. Several shifts toward colder and warmer climatic conditions were identified and dated. Furthermore, two sudden changes in the hydrological regime were dated to 9000–8820 cal. years BP and to 8150–8050 cal. years BP toward wetter and drier conditions, respectively. Specific molecular organic geochemical indicators such as faecal sterols or a strong enrichment of δ¹⁵N caused by human impact could not be detected. Therefore, the swamp should not have been intensively affected by Neolithic people and/or respective indicators of their influence have been diluted due to the high sedimentation rate.

在拜占庭狄奥多西港（伊斯坦布尔）的考古发掘过程中，发现了全新世深灰色至黑色粘土序列。该粘土单元在缺氧条件下沉积在一个小沼泽中。新石器时代的木制品和分散的有机物都在这个序列中得到了完美的保存。本研究的目的是借助该粘土单元中有机质的有机地球化学和同位素表征来评估环境变化和人为影响。基于¹⁴ C 数据的年龄模型表明，粘土是在大约 11,100 到 7500 卡路里的时期内沉积的。年 BP。氢指数值低于 100 mgHC/gTOC，正构烷烃分布在n C ₂₉处具有最大值或在n C _{31 处}，长链正构烷烃 (C ₂₅ –C ₃₃ )占优势，δ ¹³ C _org值在 -24‰ 至 -27‰ 左右，表明来自 C ₃植物的有机物质主要来自陆地。n C ₂₇、n C ₂₉、n C ₃₁和n C ₃₃的本体 δ ¹³ C _org和化合物特定的 δ ¹³ C 和 δD 值的明显偏移被解释为环境和气候条件变化的指标。已经确定并确定了向更冷和更暖气候条件的几次转变。此外，水文状况的两次突然变化可追溯到 9000-8820 cal。年 BP 和 8150–8050 cal。年 BP 分别朝着更潮湿和更干燥的条件。无法检测到特定的分子有机地球化学指标，例如粪便甾醇或人为影响引起的 δ ¹⁵ N的强烈富集。因此，沼泽不应该受到新石器时代人的强烈影响和/或他们的影响指标因高沉积率而被稀释。