Waghorn K A, Vadakkepuliyambatta S, Plaza-Faverola A, Johnson J E, Bünz S, Waage M
CAGE - Centre for Arctic Gas Hydrate, Environment and Climate, Department of Geosciences, UiT - The Arctic University of Norway, Dramsveien 201, 9037, Tromsø, Norway.
Department of Earth Sciences, University of New Hampshire, 56 College Road, Durham, NH, 03824, USA.
Sci Rep. 2020 Jun 30;10(1):10679. doi: 10.1038/s41598-020-67426-3.
The Svyatogor Ridge and surroundings, located on the sediment-covered western flank of the Northern Knipovich Ridge, host extensive gas hydrate and related fluid flow systems. The fluid flow system here manifests in the upper sedimentary sequence as gas hydrates and free gas, indicated by bottom simulating reflections (BSRs) and amplitude anomalies. Using 2D seismic lines and bathymetric data, we map tectonic features such as faults, crustal highs, and indicators of fluid flow processes. Results indicate a strong correlation between crustal faults, crustal highs and fluid accumulations in the overlying sediments, as well as an increase in geothermal gradient over crustal faults. We conclude here that gas generated during the serpentinization of exhumed mantle rocks drive the extensive occurrence of gas hydrate and fluid flow systems in the region and transform faults act as an additional major pathway for fluid circulation.
位于北克尼波维奇脊沉积物覆盖的西侧的斯维亚托戈尔脊及其周边地区，拥有广泛的天然气水合物及相关流体流动系统。这里的流体流动系统在上部沉积层序中表现为天然气水合物和游离气，由似海底反射（BSR）和振幅异常指示。利用二维地震测线和测深数据，我们绘制了诸如断层、地壳高地以及流体流动过程指标等构造特征图。结果表明，地壳断层、地壳高地与上覆沉积物中的流体聚集之间存在很强的相关性，并且在地壳断层上地热梯度增加。我们在此得出结论，挖掘出的地幔岩石蛇纹石化过程中产生的气体驱动了该地区天然气水合物和流体流动系统的广泛出现，而转换断层则充当了流体循环的另一条主要通道。
