Temperature measurements, gas chemistry, and gas hydrates of the Dvurechenskii mud volcano

The sediment temperature distribution at mud volcanoes provides insights into their activity and into the occurrence of gas hydrates. If ambient pressure and temperature conditions are close to the limits of the gas hydrate stability field, the sediment temperature distribution not only limits the occurrence of gas hydrates, but is itself influenced by heat production and consumption related to the formation and dissociation of gas hydrates. Located in the Sorokin Trough in the northern Black Sea, the Dvurechenskii mud volcano (DMV) was in the focus of detailed investigations during the M72/2 and M73/3a cruises of the German R/V Meteor and the ROV Quest 4000 m in February and March 2007. A large number of in-situ sediment temperature measurements were conducted from the ROV and with a sensor-equipped gravity corer. Gas hydrates were sampled in pressurized cores using a dynamic autoclave piston corer (DAPC). […]

泥火山沉积物温度分布情况为研究其活动性以及天然气水合物形成提供了重要线索。当环境压力和温度条件接近天然气水合物稳定性域的极限时，沉积物温度分布不仅限制了天然气水合物的形成，同时亦受到与天然气水合物形成与分解相关的热产生与消耗的影响。位于黑海北部索罗金洼地中的杜夫列琴斯克泥火山（DMV）是德国R/V气象号远洋调查船在2007年2月和3月的M72/2和M73/3a航次以及ROV Quest 4000米深潜器调查的重点对象。通过ROV和配备传感器的重力取心器进行了大量的原位沉积物温度测量。采用动态高压釜活塞取心器（DAPC）在加压心柱中采集了天然气水合物样本。 [...]