Fluidaustritte an Schlammvulkanen und Cold Seeps sowie Fluidzirkulation des Don-Kuban Tiefseefächers (Kertsch Halbinsel, Krim, Schwarzes Meer)

泥火山和冷泉释放的流体以及顿库班深海扇（刻赤半岛、克里米亚、黑海）的流体循环

• 批准号: 173116135
• 负责人: Dr. Ingo Klaucke
• 金额: --
• 依托单位: Forschungseinheit Marine Geodynamik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/173116135?language=en
• 关键词: Fluidaustritte; Schlammvulkanen; und; Cold; Seeps

The Black Sea is the largest anoxic basin worldwide and offers ideal conditions for the preservation of organic matter. Decomposition of the organic matter by bacteria or thermal cracking produces large amounts of methane gas within the Black Sea sediments. The Black Sea consequently constitutes a natural laboratory for the study of gas emissions and methane cycling in the marine environment as well as possible interactions with climate changes. With ongoing discussions about gas hydrate exploitation or the use of gas hydrate reservoirs for CO2 sequestration, a good understanding of fluid and methane circulation within continental margin sediments becomes a necessity. The large number of different types of fluid-venting systems in the Black Sea (both in shallow and in deep water) makes it an ideal target for investigations with mid-size research vessels such as RV Poseidon. We propose innovative geoacoustic and 3D-seismic investigations of the northern Black Sea margin in the area of the Kerch peninsula (Crimea, Black Sea) for the characterisation of near-surface and deep fluid circulation. The margin south of Kerch peninsula is part of the Don-Kuban deep-sea fan and is characterised by numerous emissions of biogenic methane gas, while the peninsula itself is known for the presence of several mud volcanoes. The mud volcanoes are believed to be sourced from the 5-8 km deep Maikop formation as they expel methane of thermogenic origin. The Don-Kuban fan is under compression similar to the Sorokin Trough and unlike the Palaeo-Dnepr fan. It is expected that shallow methane emissions and mud volcanoes overlap on the upper slope and form a fluid-emission system that is different from both the Sorokin Trough and the Dnepr slope. The aim of our combined bathymetry, sidescan sonar and 3D-seismic investigations is to image the different fluidexpulsion systems and deduce the functioning of these focused fluid flow systems. The study will constrain the geometrical, physical and lithological parameters of this fluid flow system and test a number of hypotheses, e.g. that there is no difference between biogenic and thermogenic gas hydrate deposits, and that stratigraphic control is more important than structural control for the accumulation of hydrates.

黑海是世界上最大的缺氧盆地，为保存有机物提供了理想的条件。有机物被细菌分解或热裂解在黑海沉积物中产生大量甲烷气体。因此，黑海是研究海洋环境中气体排放和甲烷循环以及与气候变化可能相互作用的天然实验室。随着关于天然气水合物开采或利用天然气水合物储层封存CO2的讨论的不断进行，很好地了解大陆边缘沉积物中的流体和甲烷循环成为必要。黑海有大量不同类型的流体排放系统（包括浅水和深水），使其成为使用诸如RV Poseidon等中型研究船进行调查的理想目标。我们提出了创新的地声和三维地震调查的北方黑海边缘的刻赤半岛（克里米亚，黑海）的近地表和深部流体循环的特性。刻赤半岛南部的边缘是东库班深海扇的一部分，其特征是大量生物甲烷气体的排放，而半岛本身以几个泥火山的存在而闻名。泥火山被认为来自5-8公里深的Maikop地层，因为它们排出热成因的甲烷。Don-Kuban扇与Sorokin海槽相似，但与Palaeo-Dnepr扇不同。预计浅层甲烷排放和泥火山在上斜坡重叠，形成一个不同于索罗金海槽和第聂伯斜坡的流体排放系统。我们的联合测深，侧扫声纳和三维地震调查的目的是成像不同的fluidepulsion系统，并推断这些集中的流体流动系统的功能。这项研究将限制这一流体流动系统的几何、物理和岩性参数，并检验若干假设，例如，生物成因和热成因天然气水合物矿床之间没有区别，以及对于水合物的积累，地层控制比结构控制更重要。

项目成果

FS POSEIDON Fahrtbericht / Cruise ReportPOS427 – Fluid emissions from mud volcanoes, cold seeps and fluid circulation at the Don-Kuban deep sea fan (Kerch peninsula, Crimea, Black Sea) – 23.02. – 19.03.2012Burgas, Bulgaria - Heraklion, Greece

FS POSEIDON Cruise ReportPOS427 â 泥火山、冷泉和顿库班深海扇流体循环的流体排放（刻赤半岛、克里米亚、黑海） â 23 02 â 19 03 2012布尔加斯，保加利亚 - 伊拉克利翁，希腊

• DOI: 10.3289/geomar_rep_ns_3_2012
• 发表时间: 2012
• 作者: Bialas