Petrology of ODP Leg 210 and Leg 173, and DSDP Leg 47 sites ...

• Main Authors: Marsaglia, Kathleen M, Pavia, Jennifer A, Maloney, Sara J
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2007
• Subjects: Drilling/drill rig; Leg47; Leg173; Leg210; Glomar Challenger; Joides Resolution; Deep Sea Drilling Project DSDP; Ocean Drilling Program ODP; Klaus; Maloney; Newfoundland; North Atlantic
• Online Access: https://dx.doi.org/10.1594/pangaea.776571; https://doi.pangaea.de/10.1594/PANGAEA.776571

Sand detrital modes of Albian-Eocene clastic gravity-flow deposits cored and recovered at Ocean Drilling Program Site 1276 reflect the postrift geologic evolution of the Newfoundland passive continental margin. Cretaceous sandstone compositions (average: Q57F23L20; Ls%Lsc = 35; total%bioclasts = 3) are consistent with a source on Grand Banks such as Avalon Uplift. Their relatively low potassium feldspar (Qm71K8P21) contents distinguish them from Iberian sandstones and appear to preclude an easterly source during the early history of the ocean basin. Isolated volcaniclastic input near the Paleocene/Eocene boundary (~60 Ma) at Site 1276 is also present in Iberian samples of this age, suggesting that magmatism was widespread across the North Atlantic during this time frame; the source(s) of this volcanic debris remains equivocal. In the Eocene, the development of carbonate bank facies on the shelf marks a profound compositional change to calcareous grainstones (average: Q27F11L62; Ls%Lsc = 82; total%bioclasts = ... : Supplement to: Marsaglia, Kathleen M; Pavia, Jennifer A; Maloney, Sara J (2007): Petrology and provenance of Eocene-Albian sandstones and grainstones recovered during ODP Leg 210: Implications for passive margin (rift-to-drift) sandstone provenance models. In: Tucholke, BE; Sibuet, J-C; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 210, 1-47 ...