Abstract

Signs of extensive migration of gas-bearing fluids from the sedimentary cover into the water column were identified in the northern Barents Sea during Cruises 25 and 28 of the R/V Akademik Nikolai Strakhov. The existence of a chain of interrelated processes has been revealed: upward migration of gas-bearing fluids, increase of gas concentration in bottom sediments, deformation of the bottom surface with the formation of gas funnels (pockmarks), and partial discharge of some fluids into the aquatic environment. The article presents the results of a study of the structure and composition of Holocene–Pleistocene sediments along a sub-latitudinal profile through gas vents and beyond them. Despite the degassing and the correspondence of each of the regionally developed bed to a certain stage of postglacial sedimentation, no significant diagenetic changes in the composition of the clay fraction have been established. The increased smectite content in sediments from stations 2511 and 2515 seems to be a consequence of a volcanic event with the formation of an ash layer of intermediate-basic composition and its subsequent transformation.

中文翻译：

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巴伦支海北部全新世-更新世沉积物的结构和组成

摘要

在R / V Akademik Nikolai Strakhov巡洋舰25和28航行期间，在巴伦支海北部发现了含气流体从沉积盖层广泛迁移到水柱的迹象。。揭示了一系列相互关联的过程的存在：含气流体的向上迁移，底部沉积物中气体浓度的增加，底部表面的变形以及气体漏斗的形成（麻点）以及部分流体向其中的排放。水生环境。这篇文章介绍了通过气孔及其后的沿次纬线剖面的全新世-更新世沉积物的结构和组成的研究结果。尽管每个区域发育的床都进行了脱气和对应于冰期后沉积的某个阶段，但尚未确定粘土组分的成岩作用。