Third-Order Depositional Sequences of the Mesozoic Succession of Sverdrup Basin

摘要: Abstract The Mesozoic succession of the Sverdrup Basin, Arctic Canada, is up to 9000 m thick and characterized by repetitive third-order depositional sequences. Each sequence tens hundreds metres represents a time span four eight million years. Subaerial unconformities or ravinements bound sequences on basin margins whereas conformities submarine form boundaries in more central portions basin. A typical consists thin, basal transgressive unit overlain regressive succession. are product interplay rates seven main variables: 1) thermal subsidence, 2) compaction, 3) load 4) mechanical subsidence uplift due changes horizontal lithospheric stresses, 5) sediment supply, 6) glacio-eustacy, 7) tectono-eustacy. occurrence marked sedimentary regimes, source areas patterns across many indicates that tectonics played pivotal role origin Thus, it our interpretation stresses (“Cloetingh Tectonic Model”) forcing function for cyclicity. This model also accounts intercontinental extent large differences magnitude relative sea-level falls recorded various basins.