Description: Das Projekt "Formation of mega-glendonites in the aftermath of the Paleocene-Eocene thermal maximum" wird vom Umweltbundesamt gefördert und von Universität Münster, Institut für Geologie und Paläontologie durchgeführt. Glendonites are pseudomorphs after the mineral ikaite (CaCO3 x 6H2O) and composed of calcite (CaCO3). In the past, they have been used as a paleo-thermometer because the primary mineral ikaite, according to observations and experiments, seems to be formed at temperatures near freezing, high alkalinity and high phosphate concentrations in marine sediments. An enigmatic occurrence of the largest glendonites known world-wide, in the Early Eocene Fur Formation of northwestern Denmark offers the unique possibility to shed more light on the actual mechanism and controlling parameters of ikaite formation. Right in the aftermath of the Paleocene-Eocene thermal maximum, a time known for its global pertubation in the global carbon cycle, the formation of authigenic calcium carbonate concretions start in the Fur Formation. In a specific stratigraphic interval inbetween these concretions, the glendonites can be found. We will investigate if termperature changes or changes in geochemical parameters of the Danish Basin caused the sudden formation of ikaite during a time interval that was based on known paleoclimatic reconstructions (semi tropic) not favorable for ikaite formation.
Types:
SupportProgram
Origin: /Bund/UBA/UFORDAT
Tags: Münster ? Calciumcarbonat ? Phosphat ? Biogeochemie ? Beleuchtung ? Geochemie ? Meeressediment ? Dänemark ? Kristallographie ? Licht ? Temperatur ? Frost ? Pelz ? Bildung ? Basizität ? Calcit ? Geologie ? Rechtsverfahren ? Gesteinskunde ? Einzugsgebiet ? Kohlenstoffkreislauf ? Kontrollmaßnahme ? Mineralogie ? Paläontologie ? Tropengebiet ? Kenngröße ? Globale Aspekte ? Rechte ? Mineral ? EXPERIMENT ? Lagerstättenkunde ? MECHANISMEN ? MOEGLICHKEIT ? Organische und Anorganische Geochemie ? SPEZIFISCH ? BETRACHTUNG ? THERMISCH ? UMGESTALTUNG ? FORMBLAETTER ? GROESST ? Konzentrat ?
Region: Nordrhein-Westfalen
Bounding box: 6.76339° .. 6.76339° x 51.21895° .. 51.21895°
License: cc-by-nc-nd/4.0
Language: Deutsch
Time ranges: 2013-01-01 - 2024-11-29
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