Macerals in sediments

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 dat...

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Bibliographic Details
Main Authors: Boucsein, Bettina, Stein, Ruediger
Format: Dataset
Language:English
Published: PANGAEA 2008
Subjects:
302-M0004A
ACEX-M4A
Amundsen Basin
Arctic Coring Expedition
ACEX
Arctic Ocean
ARK-VIII/3
AWI_Paleo
Exp302
Giant box corer
GKG
Integrated Ocean Drilling Program / International Ocean Discovery Program
IODP
Lomonosov Ridge
Paleoenvironmental Reconstructions from Marine Sediments @ AWI
Polarstern
PS19/175
PS19/186
PS19/189
PS19/190
PS19/194
PS19 ARCTIC91
PS2177-1
PS2185-3
PS2186-5
PS2187-1
PS2190-3
Vidar Viking
Arctic
amundsen basin
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.690523
https://doi.org/10.1594/PANGAEA.690523
Description
Summary: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 are documented by freshwater algae material (Pediastrum, Botryococcus) and immature land-plant material (corphuminite, textinite). We consider that erosion of coal-bearing sediments during transgression time lead to humic acids release as a source for bituminite deposited in the Early Eocene black shales.

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