A5030383397- Geological and Geochemical Analysis
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Polar Research and Ecology
- High-pressure geophysics and materials
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Geochemistry and Geologic Mapping
- Paleontology and Stratigraphy of Fossils
- Hydrocarbon exploration and reservoir analysis
- Cryospheric studies and observations
- Geological Modeling and Analysis
- Climate change and permafrost
- Geological and Geophysical Studies
- Geotechnical and Geomechanical Engineering
- Pleistocene-Era Hominins and Archaeology
- Geological formations and processes
- Earthquake Detection and Analysis
- Geochemistry and Elemental Analysis
- Geological and Tectonic Studies in Latin America
- Marine animal studies overview
- Image Processing and 3D Reconstruction
- Clay minerals and soil interactions
- Marine and coastal plant biology
- Lichen and fungal ecology
Norwegian Polar Institute
2008-2024
The FRAM Centre
2019
Geological Survey of Denmark and Greenland
2000-2004
UiT The Arctic University of Norway
1993-1996
Abstract A dataset to describe exposed bedrock and surficial geology of Antarctica has been constructed by the GeoMAP Action Group Scientific Committee on Antarctic Research (SCAR) GNS Science. Our group captured existing geological map data into a geographic information system (GIS), refined its spatial reliability, harmonised classification, improved representation glacial sequences geomorphology, thereby creating comprehensive coherent geology. total 99,080 polygons were unified for...
The basement of Svalbard comprises several terranes that were assembled along NS‐trending faults during the Caledonian orogeny. NW and NE parts are considered to be derived from east Greenland, while SW has affinities with Pearya, Ellesmere Island. High‐pressure (HP) metamorphic rocks, such as eclogites blueschists occur in west provide constraints on history convergence. Motalafjella HP rocks display a geometry which is compatible an initial dome structure sealed by Ordovician deposits....
Systematic geological mapping of the East Greenland Caledonides demonstrates that orogen is built up WNW-directed thrust sheets displaced across foreland windows. The windows in southern half are characterized by a thin (220–400 m) Neoproterozoic to Lower Palaeozoic succession, structurally overlain two major Caledonian (Niggli Spids and Hagar Bjerg Thrust Sheets). metasediments upper-level Sheet host 940–910 Ma granites migmatites formed during an early thermal or orogenic event, as well...
The Payer Land gneiss complex is unique among the mostly amphibolite-facies, mid-crustal complexes in East Greenland Caledonides due to its well-preserved, regional high-pressure (HP) granulite-facies metamorphism. High-pressure high-temperature (HPHT) assemblages are recognized mafic, ultramafic, granitic, and metasedimentary lithologies. Anatectic metapelites contain assemblage garnet + kyanite K-feldspar antiperthite (exsolved ternary feldspar) quartz ± biotite rutile record...
Research Article| October 01, 2005 Discovery of Paleozoic Fe-Mg carpholite in Motalafjella, Svalbard Caledonides: A milestone for subduction-zone gradients P. Agard; Agard 1 Laboratoire de Tectonique, Université Paris VI, Case 129, T46-0, 2E, 4 place Jussieu, 75252 Cedex 5, France Search other works by this author on: GSW Google Scholar L. Labrousse; Labrousse S. Elvevold; Elvevold 2Norwegian Polar Institute, 9296 Tromsø, Norway C. Lepvrier 3Laboratoire Author and Article Information...
Abstract Antarctica is the coldest, windiest and least inhabited place on Earth. One of its most enigmatic regions scoured by katabatic winds blue ice that covers 235,000 km 2 Antarctic fringe. Here, we demonstrate contrary to common belief, high-altitude inland areas are not dry, nor barren. Instead, they promote sub-surface melting enables them become “powerplants” for water, nutrients, carbon major ions production. Mapping cryoconite holes at an unprecedented scale 62 also revealed a...
The Mühlig-Hofmann- and Filchnerfjella in central Dronning Maud Land, Antarctica, consist of series granitoid igneous rocks emplaced granulite upper amphibolite facies metamorphic rocks. area has experienced high-temperature metamorphism followed by near-isothermal decompression, partial crustal melting, voluminous magmatism extensional exhumation during the later phase late Neoproterozoic to Cambrian Pan-African event. Remnants kyanite–garnet–ferritschermakite–rutile assemblages indicate an...
ABSTRACT The Seiland Igneous Province of the North Norwegian Caledonides consists a suite deep‐seated rift‐related magmatic rocks emplaced into paragneisses during late Precambrian to Ordovician time. In south‐eastern part province, contact metamorphism and later reworking intrusives associated aureoles have resulted in development three successive metamorphic stages. assemblage (M1) Opx + Grt Qtz Pl Kfs Hc Ilm ± Crd is preserved xenolithic rafts paragneiss within metagabbro....
Abstract A high‐ P granulite facies gneiss complex occurs in north‐west Payer Land (74°28′−74°47′N) the central part of East Greenland Caledonian (Ordovician–Devonian) orogen. High‐ metamorphism resulted formation assemblages Grt + Cpx Amp Qtz Ru ± Pl mafic rocks, and Ol Opx Spl rare ultramafic pods. Associated metapelites experienced anatexis kyanite stability field. Peak metamorphic formed around 800–850 °C at pressures c. 1.4–1.7 GPa, corresponding to crustal depths c . 50 km. Mafic...
Abstract Phengite-bearing eclogites occur in the Richarddalen Complex of NW Spitsbergen, Arctic Caledonides. Phase equilibrium modelling and conventional geothermobarometry have been used to constrain metamorphic evolution these eclogites. Pseudosections are calculated for peak-pressure assemblage garnet+omphacite+phengite+amphibole+dolomite quartz+rutile. Compositional isopleths garnet phengite pressure–temperature ( P–T ) conditions 1.9–2.0 GPa 720–730 °C, good agreement with results...
Abstract SIMS U‐Pb zircon dating of metaigneous rocks the Nordbreen Nappe from West Ny‐Friesland terrane (Eastern Basement Province Svalbard) yields crystallization ages 1,761 ± 4 Ma for a felsic metatuff and 1,373 metagabbro dyke. The Palaeoproterozoic age is similar to previously obtained various study area, whereas Mesoproterozoic has not been thus far documented on Svalbard. However, pattern reported Northeast Greenland. Therefore, we conclude that can be correlated with equivalent units...