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.

黑海是全球最大的缺氧盆地，为保存有机物提供了理想的条件。通过细菌或热裂食对有机物的分解会在黑海洋沉积物中产生大量的甲烷气体。因此，黑海构成了研究气体排放和海洋环境中甲烷循环的自然实验室，以及可能与气候变化的相互作用。随着关于漏油剥削或使用气体水合物储层进行二氧化碳隔离的持续讨论，对大陆边缘沉积物内的流体和甲烷循环的良好理解成为必要。黑海（无论是在浅水还是在深水中），大量不同类型的流体通风系统使其成为使用中型研究容器（如RV Poseidon）进行研究的理想目标。我们提出了对北部半岛（克里米亚，黑海）北部黑海边缘的创新地球和3D脉冲研究，以表征近地面和深层液体循环。 Kerch半岛以南的边缘是Don-Kuban深海风扇的一部分，其特征是大量的生物甲烷气体排放，而半岛本身以几个泥土火山的存在而闻名。据信，泥土被认为是从5-8 km深的Maikop地层中采购的，它们会驱除热源的甲烷。 Don-Kuban风扇的压缩与Sorokin槽相似，与Palaeo-Dnepr风扇不同。预计浅甲烷排放和泥土在上坡上重叠，并形成与索他蛋白槽和DNEPR坡度不同的流体发射系统。我们合并的测深量法，侧扫声纳和3D-Seismic研究的目的是成像不同的氟化型系统，并推断出这些聚焦流体流动系统的功能。该研究将限制该流体流量系统的几何，物理和岩性参数，并检验许多假设，例如生物和热气体水合物沉积之间没有差异，而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