A5057151388- Hydrocarbon exploration and reservoir analysis
- Geological Studies and Exploration
- Paleontology and Stratigraphy of Fossils
- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Hydraulic Fracturing and Reservoir Analysis
- Geochemistry and Elemental Analysis
- Atmospheric and Environmental Gas Dynamics
- Reservoir Engineering and Simulation Methods
- Geological and Geochemical Analysis
- Geochemistry and Geologic Mapping
- Drilling and Well Engineering
- Geological and Geophysical Studies
- Enhanced Oil Recovery Techniques
- Geological Modeling and Analysis
- Petroleum Processing and Analysis
- Geological formations and processes
- CO2 Sequestration and Geologic Interactions
- Radioactive element chemistry and processing
- Seismic Imaging and Inversion Techniques
- Astro and Planetary Science
- NMR spectroscopy and applications
- Isotope Analysis in Ecology
- Geophysical and Geoelectrical Methods
- Marine Biology and Ecology Research
Geological Survey of Denmark and Greenland
2015-2024
Technical University of Denmark
2017
GFZ Helmholtz Centre for Geosciences
2017
Université de Lorraine
2017
Japan External Trade Organization
2014
University of Copenhagen
2000-2003
Natural History Museum
2000-2003
Natural History Museum Aarhus
2002
The evolution of Earth’s biota is intimately linked to the oxygenation oceans and atmosphere. We use isotopic composition concentration molybdenum (Mo) in sedimentary rocks explore this relationship. Our results indicate two episodes global ocean oxygenation. first coincides with emergence Ediacaran fauna, including large, motile bilaterian animals, ca. 550–560 million year ago (Ma), reinforcing previous geochemical indications that Earth surface facilitated radiation. second, perhaps...
The lithostratigraphic subdivision of the Cambrian successions in Scania-Bornholm, Östergötland, Västergötland, Närke, Öland-Gotland, southern Bothnian Sea and Mjøsa District is reviewed revised. review includes Tremadocian part Alum Shale Formation. Scania-Bornholmcomprises Nexø, Hardeberga, Læså, Gislöv formations. Nexø Formation Bornholm subdivided into new Gadeby Langeskanse members, which are c. 40 50 m thick, respectively. 1–15 thick arkosic basal sandstone succession Scania,...
Abstract. The last 8 Myr of the Cretaceous greenhouse interval were characterized by a progressive global cooling with superimposed cool/warm fluctuations. mechanisms responsible for these climatic fluctuations remain source debate that can only be resolved through multi-disciplinary studies and better time constraints. For first time, we present record very high-resolution (ca. 4.5 kyr) sea-surface temperature (SST) changes from Boreal epicontinental Chalk Sea (Stevns-1 core, Denmark), tied...
The Steptoean Positive Carbon Isotope Excursion Event (SPICE) represents one of the largest carbon cycle perturbations in Cambrian, which coincided with climatic changes and dramatic extinction shallow-shelf faunas. This perturbation has been linked to a global expansion marine euxinia (SPICE-OAE), but precise timing, duration extent changing redox conditions across SPICE event, as well its influences on coeval biotic evolution, remain unclear. Here, we report paired δ98Mo–δ238U data this...
Abstract The Cambrian is the most poorly dated period of past 541 million years. This hampers analysis profound environmental and biological changes that took place during this period. Astronomically forced climate cycles recognized in sediments anchored to radioisotopic ages provide a powerful geochronometer has fundamentally refined Mesozoic–Cenozoic time scales but not yet Palaeozoic. Here we report continuous astronomical signal detected as geochemical variations (1 mm resolution) late...
Continuous and biostratigraphically well-constrained carbon isotope (δ13Corg) profiles through the upper Miaolingian (middle Cambrian) to Tremadocian (Lower Ordovician) part of Alum Shale Formation in four drill cores from southernmost Scandinavia are described. The sections record seven Furongian (upper excursions/spikes, which three appear valuable as auxiliary markers for identifying global stage boundaries. Steptoean Positive Carbon Isotope Excursion (SPICE) event with a magnitude up...
Oxygen is a prerequisite for all large and motile animals. It puzzling paradox that fossils of benthic animals are often found in black shales with geochemical evidence deposition marine environments anoxic sulfidic bottom waters. debated whether the proxies unreliable, affected by diagenesis, or transported from afar perhaps were not benthic. Here, we improved stratigraphic resolution anoxia records 100-1000 fold using core-scanning X-Ray Fluorescence established centennial record oxygen...
Understanding of the processes petroleum source rock (SR) accumulation in lacustrine rift basins and behavior lake systems as long-term carbon sinks is fragmentary. Investigation an 800 m thick (500 core ~ 300 outcrop), deep-lacustrine, Oligocene section Vietnam, provides a rare insight into controls deposition organic (OC) SR formation continental basins. A multidisciplinary dataset, combining elemental data, inorganic geochemistry with sedimentology, shows that richest alginite-prone,...
The late Cambrian extinction – Early Ordovician biodiversification represents one of the crucial lower Paleozoic biological changes. However, mechanisms responsible for this transition remain poorly understood. Here, we reconstructed paleoenvironmental changes based on a model that integrated atmospheric-oceanic-biological inputs and provided first detailed assessment Cambro-Ordovician turnover. results show depositional environments evolved into extremely sulfidic conditions with nutrient...
Abstract The Cambro‐Ordovician interval marks a significant transition from extinction to bio‐diversification in deep time. However, the relationship of bio‐transition volcanism, commonly characterized by mercury (Hg) systematics sedimentary records, has not been examined. We present first Hg Scandinavian Alum Shale. Our results show pronounced Furongian enrichments, coupled with positive Δ 199 Hg, 200 and 201 values negative 204 that we ascribe atmospheric transport over long‐distances,...
Abstract The Scandinavian Alum Shale Formation (Middle Cambrian to Lower Ordovician) contains high levels of organic carbon (up 25 wt.%) and syngenetic enriched trace elements. A regional survey the uranium content reveals that is preferentially in sections located palaeo-shorewards compared with farther offshore. This type enrichment mode evident Upper (above A. pisiformis Zone) Tremadoc interval. In Middle no significant variation level present. most biozone (Peltura scarabaeoides average...
The Cambrian to Lower Silurian succession in Denmark is mostly composed of organic-rich black shales that were deposited an epicontinental sea during a period high global level (Haq & Schutter 2008). mid-Cambrian early Ordovician Alum Shale was intensively studied the 1980s for its source-rock properties (e.g. Buchardt et al. 1986). Recent attention has focused on potential as unconventional shale gas source (Energistyrelsen 2010). On southern Bornholm, many wells have been drilled...