Browsing Department of Earth Science by Title
Now showing items 357-376 of 1046
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Grenville-age continental arc magmatism and crustal evolution in central Dronning Maud Land (East Antarctica): Zircon geochronological and Hf-O isotopic evidence
(Peer reviewed; Journal article, 2020)This study focusses on the Grenville-age Maud Belt in Dronning Maud Land (DML), East Antarctica, which was located at the margin of the Proto-Kalahari Craton during the assembly of Rodinia. We present new U–Pb zircon ages ... -
Grottekartlegging og strukturgeologisk påvirkning på grottedannelse sør for Reingardslivatnet, Rana.
(Master thesis, 2016-06-01)Oppgaven utgjør sammen med Stadheim (2016) første ledd i det gjenopptatte forskningsarbeidet av de grotter som er lokalisert sør for Reingardslivatnet, Rana, som i utgangspunktet har vært fredet siden 6. Januar 1967. Den ... -
Grotter og grottedannelse i Plurdalen: Et tverrsnitt, Mo i Rana.
(Master thesis, 2015-06-01)Denne hovedfagsoppgaven omhandler grotter og grottedannelse langs et tverrsnitt av Plurdalen, i Nordland. Plurdalen er en dal med tydelige fluviale trekk, hvor mangelen på U-dalprofiler kan tyde på at den glasiale erosjonen ... -
Growth and retreat of the last British–Irish Ice Sheet, 31 000 to 15 000 years ago: the BRITICE-CHRONO reconstruction
(Journal article; Peer reviewed, 2022)The BRITICE-CHRONO consortium of researchers undertook a dating programme to constrain the timing of advance, maximum extent and retreat of the British–Irish Ice Sheet between 31 000 and 15 000 years before present. The ... -
Growth of collisional orogens from small and cold to large and hot ‐ inferences from geodynamic models
(Journal article; Peer reviewed, 2021)It is well documented that the interplay between crustal thickening and surface processes determines growth of continent-continent collision orogens from small and cold to large and hot. Additionally, studies have demonstrated ... -
GrSMBMIP: intercomparison of the modelled 1980-2012 surface mass balance over the Greenland Ice Sheet
(Journal article; Peer reviewed, 2020)Observations and models agree that the Greenland Ice Sheet (GrIS) surface mass balance (SMB) has decreased since the end of the 1990s due to an increase in meltwater runoff and that this trend will accelerate in the future. ... -
Halokinetic modulation of sedimentary thickness and architecture: A numerical modelling approach
(Journal article; Peer reviewed, 2021)Subsurface salt flow can deform overlying strata and influence contemporaneous sedimentary systems. Studying salt-sediment interactions is challenging in the subsurface due to poor imaging adjacent to salt, and in the field ... -
Harnessing the potential of CT scanning to identify cryptotephra in sediment cores: a controlled experiment.
(Master thesis, 2019-12-20)Volcanic ash (tephra) is a powerful geochronological tool, called tephrochronology, as rapid widespread deposition in multiple environments allows for correlation of geological archives across vast areas. It can thus help ... -
Hemipelagic deposits on the Mendeleev and northwestern Alpha submarine Ridges in the Arctic Ocean: acoustic stratigraphy, depositional environment and an inter-ridge correlation calibrated by the ACEX results
(Peer reviewed; Journal article, 2010)The first high resolution multichannel seismic data from the Mendeleev and Alpha Ridges in the Arctic Ocean have been used to investigate the depositional history, and compare acoustic stratigraphies of the three main ... -
High Mountain Melt-Down: Local Perceptions of Global Warming in the Andes and Himalayas
(Master thesis, 2008)Present scientific knowledge about global warming affirms that ice and snow packs in the high mountains of the world are melting at increasing rates (see IPCC 2007 and UNEP 2007). Melting glaciers and receding snowlines ... -
High resolution benthic Mg/Ca temperature record of the intermediate water in the Denmark Strait across D-O stadial-interstadial cycles
(Peer reviewed; Journal article, 2018)Dansgaard‐Oeschger (D‐O) climate instabilities that took place during Marine Isotope Stage 3 are connected to changes in ocean circulation patterns and sea ice cover. Here we explore in detail the configuration of the water ... -
High resolution seismic stratigraphic analysis: An integrated approach to the subsurface geology of the SE Persian Gulf
(Doctoral thesis, 2006-06-30) -
High-Resolution Environmagnetic Study of HOTRAX Core JPC-14 from the Alpha Ridge, Arctic Ocean
(Master thesis, 2007-11-19)Core JPC-14 was derived from the HLY-0503 expedition from the Alpha Ridge. My supervisor professor Reidar Løvlie guided me with the project, from experiments, data obtaining, and analyisis. -
High-Resolution Ps Receiver Function Imaging of the Crust and Mantle Lithosphere Beneath Southern New England and Tectonic Implications
(Journal article; Peer reviewed, 2021)Southern New England exhibits diverse geologic features resulting from past tectonic events. These include Proterozoic and early Paleozoic Laurentian units in the west, several Gondwana-derived terranes that accreted during ... -
High-resolution record revealsclimate-driven environmental andsedimentary changes in an active rift
(Peer reviewed; Journal article, 2019-02-28)Young rifts are shaped by combined tectonic and surface processes and climate, yet few records exist to evaluate the interplay of these processes over an extended period of early rift-basin development. Here, we present ... -
A high-resolution study of Holocene paleoclimatic and paleoceanographic changes in the Nordic Seas
(Peer reviewed; Journal article, 2003-03-26)High-resolution records from IMAGES core MD95-2011 in the eastern Norwegian Sea provide evidence for relatively large- and small-scale high-latitude climate variability throughout the Holocene. During the early and ... -
High-resolution δ^18 O and assemblage analysis between 1949- and 2000 AD based on planktonic foraminifera from the Storegga Slide, eastern Norwegian Sea
(Master thesis, 2016-09-28)In this study are presented results from a high-resolution δ^18 O and assemblage analysis between 1949- and 2000 AD based on planktonic foraminifera from core GS13-182-01. The core was retrieved from the head of the Storegga ... -
Higher-order Hamilton–Jacobi perturbation theory for anisotropic heterogeneous media: dynamic ray tracing in Cartesian coordinates
(Peer reviewed; Journal article, 2019)With a Hamilton–Jacobi equation in Cartesian coordinates as a starting point, it is common to use a system of ordinary differential equations describing the continuation of first-order derivatives of phase-space perturbations ... -
Higher-order Hamilton–Jacobi perturbation theory for anisotropic heterogeneous media: dynamic ray tracing in ray-centred coordinates
(Journal article; Peer reviewed, 2021)Dynamic ray tracing is a robust and efficient method for computation of amplitude and phase attributes of the high-frequency Green’s function. A formulation of dynamic ray tracing in Cartesian coordinates was recently ... -
A Highly Depleted and Subduction-Modified Mantle Beneath the Slow-Spreading Mohns Ridge
(Journal article; Peer reviewed, 2022)The Mohns Ridge is a very slow-spreading ridge that, together with the Knipovich Ridge, marks the boundary between the North American and Eurasian plates in the Norwegian-Greenland Sea. In this study, we report the major ...