oa Chemostratigraphy of the Lower Cretaceous (Barremian - Albian) Panuke B-90 Drill Core Sedimentary Rocks from the Scotian Shelf, Nova Scotia

The Scotian Shelf in Atlantic Canada represents a Mesozoic to Cenozoic passive margin comprising carbonates and siliciclastic deposits, with the abandoned Panuke oil and gas field illustrating active petroleum systems. This field sits above a lower Cretaceous deltaic succession, characterized by alternating fine-grained marine units, which serve as both source rocks and seals, including the Naskapi Member of the Logan Canyon Formation. The Early Aptian Ocean Anoxic Event (OAE1a) within the Naskapi Member provides insights into organic production and preservation during this significant global event.

The complex stratigraphic successions arise from short-term sea-level fluctuations, affecting sediment production and organic matter preservation across various depositional environments. We hypothesize that the molecular organic matter matrix varies with the depositional environment and its relationship to base-level sequence stratigraphy. However, traditional proxies often miss high-resolution changes in deltaic margins. To address this, we are employing multi-proxy geochemical data to better understand these variations across five parasequences within the Mississauga Formation and Naskapi Member intersected by the Panuke B-90 well.