The study investigated the influence of maturity, biomass type, and depositional settings on the distribution and relative abundance of polycyclic aromatic hydrocarbons (PAHs) for lacustrine sediments collected from depths up to 1000 m of Prebreza and Čučale stratigraphic units (the northwest part of the Toplica Basin). A recently proposed benzo[ghi]perylene/(perylene + benzo[ghi]perylene) parameter, along with commonly used Phenanthrene Alkylation Index and benzo[e]pyrene/(perylene + benzo[e]pyrene) indices, pointed out differences in maturity levels between stratigraphic units by displaying a positive linear relationship with vitrinite reflectance. However, in several immature Prebreza sediments, a substantial presence of algae and/or anoxic, mesosaline/hypersaline conditions were suitable for forming β-substituted methylphenanthrenes and 6-ring benzo[ghi]perylene. Generally, high molecular weight unsubstituted PAHs (HMW_PAHs), particularly perylene, predominated Prebreza sediments. Anoxic conditions appeared to be decisive for accumulating and preserving the perylene carbon skeleton in studied stratigraphic units. Besides, more intense volcanism in the Čučale unit favored combustion processes, which prompted the accumulation of low molecular weight unsubstituted PAHs (LMW_PAHs), especially phenanthrene. A general prevalence of retene over cadalene in Prebreza sediments, in which alginite and liptodetrinite predominated, implied algae as retene precursor. Selective degradation of retene or hindered demethylation of 9-methylphenanthrene under anoxic and more saline environmental settings had occurred notably in the Prebreza unit, which led to the formation of 1-methylphenanthrene and/or pimanthrene (1,7-dimethylphenanthrene). Čučale sediments with substantial amounts of vitrinite macerals or saturated diterpenoids had a predominant simonellite derived from conifers. Non-degraded and well-preserved Pinaceae conifers predominated in Prebreza sediments deposited under semi-arid climatic conditions, whereas mixed degraded/non-degraded conifers characterized Čučale sediments deposited in a wide range of climatic conditions, from semi-arid to semi-humid.

该研究调查了成熟度、生物量类型和沉积环境对从 Prebreza 和 Čučale 地层单元（托普里卡西北部）采集的湖相沉积物中多环芳烃 (PAH) 分布和相对丰度的影响。盆地）。最近提出的苯并[ ghi ]苝/(苝+苯并[ ghi ]苝)参数，以及常用的菲烷基化指数和苯并[ e ]芘/(苝+苯并[ e]]芘）指数，通过显示与镜质体反射率的正线性关系，指出地层单元之间成熟度水平的差异。然而，在一些未成熟的 Prebreza 沉积物中，大量存在的藻类和/或缺氧、中盐酸盐/超盐酸盐条件适合形成 β-取代的甲基菲和 6-环苯并[ ghi ]苝。通常，高分子量未取代的多环芳烃 (HMW _PAHs），尤其是per，主要是Prebreza沉积物。缺氧条件似乎对所研究地层单元中苝碳骨架的积累和保存起决定性作用。此外，Čučale 单元中更强烈的火山活动有利于燃烧过程，这促使低分子量未取代多环芳烃（LMW _PAHs)，尤其是菲。在 Prebreza 沉积物中，维甲酸普遍普遍高于 cadalene，其中藻酸盐和 liptodetrinite 占主导地位，暗示藻类是维甲酸的前体。在缺氧和更多盐分环境设置下，视黄烯的选择性降解或 9-甲基菲的受阻去甲基化尤其发生在 Prebreza 装置中，这导致了 1-甲基菲和/或 pimanthrene（1,7-二甲基菲）的形成。含有大量镜质体或饱和二萜类化合物的 Čučale 沉积物具有主要来源于针叶树的硅铁矿。未退化和保存完好的松科针叶树在半干旱气候条件下沉积的 Prebreza 沉积物中占主导地位，而混合退化/未退化针叶树的特征是 Čučale 沉积物在广泛的气候条件下沉积，