Macerals in sediments
Cobertura |
MEDIAN LATITUDE: 88.291725 * MEDIAN LONGITUDE: 126.484051 * SOUTH-BOUND LATITUDE: 87.529300 * WEST-BOUND LONGITUDE: 84.745000 * NORTH-BOUND LATITUDE: 89.983333 * EAST-BOUND LONGITUDE: 144.166200 * DATE/TIME START: 1991-08-27T00:00:00 * DATE/TIME END: 2004-08-27T00:00:00 |
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Data(s) |
09/04/2008
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Resumo |
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. |
Formato |
application/zip, 2 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.690523 doi:10.1594/PANGAEA.690523 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
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, doi:10.1016/j.marpetgeo.2008.04.001 |
Palavras-Chave | #302-M0004A; ACEX-M4A; Algae; Amundsen Basin; Arctic Coring Expedition, ACEX; Arctic Ocean; ARK-VIII/3; AWI_Paleo; Bituminite; Coal clasts; Coal clasts or fragments; Cutinite; Depth; Depth, composite; DEPTH, sediment/rock; Depth comp; Detritus; Dinoflagellate cyst; Dinofl cyst; DRILL; Drilling/drill rig; Event; Exp302; Fluorescent microscope; Giant box corer; GKG; Huminite; Inertinite; Integrated Ocean Drilling Program / International Ocean Discovery Program; IODP; Label; Lamalginite; Liptinite, aquatic-terrigenous; Liptinite, terrigenous; Liptinite aqua-terr; Liptinite terr; Liptodetrinite, aquatic; Liptodetrinite, terrigenous; Liptodetrinite aqua; Liptodetrinite terr; Lomonosov Ridge, Arctic Ocean; Maceral; Maceral, marine; Maceral, terrigenous; Maceral count; Maceral marine; Maceral terrigenous; OM aquatic; OM terr; Organic matter, aquatic; Organic matter, terrigenous; 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; Sample code/label; single cysts; Sporinite; Telalginite; Textinite; Vidar Viking; Vitr; Vitrinite |
Tipo |
Dataset |