This study presents the results derived from micropaleontological and organic geochemical analyses of mud breccia samples obtained (through gravity coring) from five mud volcanoes (Gelendzhik, Heraklion, Moscow, Milano, Leipzig) located at the Olimpi mud volcano field on the Mediterranean Ridge accretionary complex. A thorough calcareous nannofossil semi-quantitative analysis was performed to determine the biostratigraphic assignment of the deep-seated source strata. Mudstone/shale clasts of different stratigraphic levels were identified and assigned to the Miocene nannofossil biozones CNM10, CNM8–9, CNM7, CNM6–7, and Oligocene CNO4/CNO5. A single mudstone clast from the Gelendzhik plateau, assigned to the biozone CNM10, demonstrated unique micropaleontological and geochemical characteristics, suggesting a sapropelic origin. Subsequently, the total organic carbon (TOC) content and thermal maturity of the collected mud breccias was evaluated using the Rock-Eval pyrolysis technique, and their oil and gas potential was estimated. The pyrolyzed sediments were both organic rich and organic poor (TOC >0.5% or <0.5%, respectively), with their organic matter showing characteristics of the type III kerogen that consists of adequate hydrogen to be gas generative, but insufficient hydrogen to be oil prone. However, the organic matter of the late Serravallian (CNM10) sapropelic mudstone was found to consist of a mixed type II/III kerogen, implying an oil-prone source rock.

中文翻译：

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地中海洋脊的麦西期前沉积物：奥林皮泥火山场的生物地层学和地球化学证据

这项研究提出的结果是通过对位于地中海沿岸增生复合体的奥林皮泥火山场上的五个泥火山（Gelendzhik，Heraklion，莫斯科，米兰，莱比锡）的泥火山角砾岩样品（通过重力取芯）进行的古生物学和有机地球化学分析得出的。进行了彻底的钙质纳米化石半定量分析，以确定深层烃源岩层的生物地层学分配。识别出不同地层水平的泥岩/页岩碎屑，并将其划分为中新世南化石生物区CNM10，CNM8-9，CNM7，CNM6-7和渐新世CNO4 / CNO5。来自格连吉克高原的单个泥岩碎屑被分配到生物区CNM10，显示出独特的微古生物学和地球化学特征，表明它是腐生的。随后，使用Rock-Eval热解技术评估了收集到的泥角砾岩的总有机碳（TOC）含量和热成熟度，并估算了它们的油气潜力。热解后的沉积物既富含有机物，也富含有机物（分别为TOC> 0.5％或<0.5％），其有机物显示出III型干酪根的特征，其特征在于：氢气足以生成气体，而氢气不足而不能用作石油。易于。然而，发现塞拉瓦利亚晚期（CNM10）腐泥质泥岩的有机质由混合的II / III型干酪根组成，这意味着容易产生油的烃源岩。热解后的沉积物既富含有机物，也富含有机物（分别为TOC> 0.5％或<0.5％），其有机物显示出III型干酪根的特征，其特征在于：氢气足以生成气体，而氢气不足而不能用作石油。易于。然而，发现塞拉瓦利亚晚期（CNM10）腐泥质泥岩的有机质由混合的II / III型干酪根组成，这意味着容易产生油的烃源岩。热解后的沉积物既富含有机物，也富含有机物（分别为TOC> 0.5％或<0.5％），其有机物显示出III型干酪根的特征，其特征在于：氢气足以生成气体，而氢气不足而不能用作石油。易于。然而，发现塞拉瓦利亚晚期（CNM10）腐泥质泥岩的有机质由混合的II / III型干酪根组成，这意味着容易产生油的烃源岩。