The Greater Barents Sea Basin (GBSB) in Arctic Russia and Norway is an intracratonic basin that accommodated an enormous amount of sediment during the Triassic. These deposits are up to 4.5 km thick over an area 2,500,000 km², and consist of marine mudstones and mudstone‐rich fluvio‐deltaic topsets with sandstone‐dominated fluvial channels. The basin is well‐studied and data‐rich, but regional correlation between different parts is lacking. Provenance data from adjacent Arctic basins have been interpreted to imply sediment transport from the Ural orogen across the GBSB, but these are disputed because of great transport distances, poorly constrained sediment‐transport directions and unknown timing of bypass. We integrated data from 3,238 seismic lines, 257 wells and palynostratigraphy, as well as published outcrop data, to create the first unified stratigraphic framework for the Triassic deposits across the entire GBSB. Results show that (1) sediment was transported northwest by one linked sedimentary system stretching across the entire basin; (2) sediment was derived from a source in the east comprising the Urals and West Siberia; (3) the main stratigraphic boundaries are major flooding surfaces which can be traced throughout the basin; and (4) significant amounts of sediment overspilled from the Barents Sea into adjacent sedimentary basins, starting with the Lomonosov Ridge from the Early Triassic, and into basins to the northwest (e.g. Sverdrup, Chukotka) during the late Carnian. These results provide a better understanding of geodynamics and provenance data in the Arctic, to improve the prediction of reservoirs in the area, and indicate a protracted uplift‐history of the northernmost Urals that started in the Carnian ~237 Ma. Furthermore, it shows how large intracratonic basins interact with uplands and subside over tens of millions of years.

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大巴伦支海三叠纪地层的区域相关性和地震地层学：对北极盆地沉积物传输的影响

俄罗斯和挪威的北极地区大巴伦支海盆地（GBSB）是克拉通盆地，在三叠纪期间容纳了大量的沉积物。这些矿床的总厚度为4.5 km，覆盖面积为2,500,000 km ²，由海洋泥岩和富含泥岩的河流三角洲顶板组成，并以砂岩为主的河道。对流域的研究和数据丰富，但缺乏不同部分之间的区域相关性。来自相邻北极盆地的物源数据已被解释为意味着来自乌拉尔造山带的泥沙穿过GBSB的传输，但是由于传输距离长，泥沙传输方向约束受限以及绕行时间不明而引起争议。我们整合了3238条地震线，257口井和古地层的数据，以及已发布的露头数据，为整个GBSB上的三叠纪矿床创建了第一个统一的地层框架。结果表明：（1）沉积物通过一个连贯的沉积体系向西北输送，并贯穿整个盆地。（2）沉积物来自包括乌拉尔山脉和西西伯利亚的东部来源。（3）主要的地层边界是主要的洪泛面，可以在整个盆地中追踪到。（4）大量的沉积物从巴伦支海溢出到相邻的沉积盆地中，从三叠纪早期的罗蒙诺索夫山脊开始，到后期的卡尼期进入西北盆地（例如，Sverdrup，Chukotka）。这些结果更好地了解了北极的地球动力学和物源数据，从而改善了该地区储层的预测，并指示了始于Carnian〜237 Ma的最北端乌拉尔的长期隆升历史。此外，它还显示了大型克拉通盆地与高地相互作用并在数千万年间逐渐消退。