Processed seismic data of Cruise ARK25/3

The multidisciplinary marine geoscientific expedition ARK-25/3 was focused on the Greenland part of northern Baffin Bay and was aimed to acquire new geoscientific data to be used for modelling the evolution of the Greenland continental margin and its hydrocarbon prospective. The data format is Society of Exploration Geophysicists SEG Y. The cruise was performed under the direction of the Federal Institute for Geosciences and Natural Resources Hannover in cooperation with the Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven. Using 70 days of ship time onboard the research icebreaker R/V POLARSTERN a comprehensive data set was acquired along profiles extending from the deep oceanic basin in the central part of North Baffin Bay onto the Greenland continental margin in an area which was bordered by the Kane Basin in the North and Disko Island in the South. By means of multi-channel seismic, wide angle seismic, gravimetric and magnetic methods the structural inventory of the crust in the NW Baffin Bay was investigated. Additionally, heat flow data and sediment cores were collected along lines crossing the Greenland continental margin. The cores were extracted for geochemical and geomicrobiological analysis to be used for basin modelling, studying the hydrocarbon potential, and the hydrocarbon degradation by microorganisms under polar conditions. Geological sampling in the coastal area was done between Melville Bay and Washington Land. The collected rock material will be used to derive constraints on the erosion history of the coastal area. Aeromagnetic data was acquired covering a substantial part of the marine survey area to investigate magnetic signatures of the oceanic crust and the continental margin. This report summarizes the working programme and contains the documentation of acquired data and first results of the expedition.多学科海洋地球科学考察航次ARK-25/3聚焦于巴芬湾北部的格陵兰海域，旨在获取全新地球科学数据，用于模拟格陵兰大陆边缘的演化过程及其油气勘探前景。本次科考数据采用勘探地球物理学家协会（Society of Exploration Geophysicists）SEG Y格式存储。本次航次由汉诺威地球科学与自然资源联邦研究所（Federal Institute for Geosciences and Natural Resources Hannover）主导，与不来梅港阿尔弗雷德·魏格纳极地与海洋研究所（Alfred-Wegener-Institute for Polar and Marine Research, Bremerhaven）合作开展。科考队依托极地号（R/V POLARSTERN）破冰研究船，历时70天，沿多条测线完成综合数据采集：测线覆盖范围从巴芬湾中部深海洋盆延伸至格陵兰大陆边缘，北至凯恩盆地（Kane Basin）、南至迪斯科岛（Disko Island）。通过多道地震、广角地震、重力与磁法勘探手段，研究团队对巴芬湾西北部地壳的构造全貌展开了系统调查。此外，科考队沿横穿格陵兰大陆边缘的测线采集了热流数据与沉积岩芯，这些岩芯将用于地球化学与地质微生物学分析，以支撑盆地模拟、油气潜力评估以及极地环境下微生物对烃类降解过程的研究。科考队还在梅尔维尔湾（Melville Bay）至华盛顿地（Washington Land）的近岸区域开展了地质采样，采集的岩石样本将用于约束近岸地区的侵蚀演化历史。本次科考还获取了覆盖大部分海洋调查区域的航空磁测数据，以研究洋壳与大陆边缘的磁异常特征。本报告总结了本次航次的工作计划，收录了已获取数据的文档资料与科考航次的初步研究成果。