Macerals in sediments ...

• Main Authors: Boucsein, Bettina, Stein, Ruediger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2008
• Subjects: Giant box corer; Exp302; ARK-VIII/3; CCGS Captain Molly Kool Vidar Viking; Polarstern; Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Arctic; Arctic Ocean
• Online Access: https://dx.doi.org/10.1594/pangaea.690523; https://doi.pangaea.de/10.1594/PANGAEA.690523

The study of particulate organic matter (OM) in Arctic Ocean sediments from the Late Cretaceous to the Eocene (IODP Expedition 302) has revealed detailed information about the aquatic/marine OM fluxes, biological sources, preservation and export of terrestrial material. Here, we present detailed data from maceral analysis, vitrinite reflectance measurements and organic geochemistry.During the Campanian/Paleocene, fluxes of land-derived OM are indicated by reworked and oxidized macerals (vitrinite, inertinite) and terrigenous liptinite (cutinite, sporinite). In the Early Eocene, drastic environmental changes are indicated by peaks in aquatic OM (up to 40-45%, lamalginite, telalginite, liptodetrinite, dinoflagellate cysts) and amorphous OM (up to 50% bituminite). These events of increased aquatic OM flux, similar to conditions favoring black shale deposition, correlate with the global d13C events "Paleocene/Eocene Thermal Maximum" (PETM) and "Elmo-event". Freshwater discharge and proximity of the source area ... : Supplement to: Boucsein, Bettina; Stein, Ruediger (2008): Black shale formation in the late Paleocene/early Eocene Arctic Ocean and paleoenvironmental conditions: New results from a detailed organic petrological study. Marine and Petroleum Geology ...