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  • 1. Andersson, Per
    et al.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Boström, Kurt
    Manganese in rain: throughfall and river water in North Swedish coniferous forest1989In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 70, no 15, p. 333-Article in journal (Other academic)
  • 2. Andersson, Per S.
    et al.
    Wasserburg, G.J.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Isotopic and chemical composition of Sr and Nd in dissolved and suspended loads in fresh and brackish waters from the Baltic Sea1996In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 74, no 16, p. 329-Article in journal (Other academic)
  • 3. Andersson, Per S.
    et al.
    Wasserburg, G.J.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Transport and mixing of Sr and Nd from old and young terranes in the Baltic Basin1992In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 73, no 14, p. 167-Article in journal (Other academic)
  • 4. Berggren, Robert
    et al.
    Sandrin, Alessandro
    Elming, Sten-åke
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Physical properties of rocks and geophysical data as tools for targeting Fe-oxide Cu-Au mineralisations in northern Sweden2004In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 85, no 47Article in journal (Other academic)
  • 5. Boström, Kurt
    et al.
    Burman, J-O
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Pontér, Christer
    Accumulation and selective loss patterns for Mn, Ba and other trace metals in the Baltic Sea1983In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 64, no 18, p. 243-Article in journal (Other academic)
  • 6. Chen, J.H.
    et al.
    Andersson, Per S.
    Wasserburg, G.J.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Uranium geochemistry in the Baltic Sea: mixing of different sources deduced from 234U - 238U1993In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 74, no 16, p. 329-Article in journal (Other academic)
  • 7. Dineva, Savka
    et al.
    Cochrane, C.
    Forouhideh, F.
    Mereu, R.
    Is the local seismicity along the North Shroe of Lake Erie (Southwestern Ontario) related to the oil/gas production and water injection2009In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 90, no 52 Suppl.Article in journal (Refereed)
    Abstract [en]

    Over the past decades a number of small earthquakes have been recorded in Leamington - Ridgetown area along the north shore of Lake Erie (southwestern Ontario). A new seismic cluster is forming in this area, away from the already known clusters in Ontario. The new seismic area lays across the seismic area south of Lake Erie (along the Pennsylvania- Ohio border), known for some moderate induced events related to the oil production there. Another cluster related to the oil/gas production- in the region of Gobles, north of Lake Erie-has been documented and studied by Mereu et al. (1986). The induced seismicity is usually related not to the oil/gas production itself but to the water injection accompanying this production. The water injection is used in southern Ontario in Leamington - Ridgetown area to increase the oil/gas recovery from the existing reservoirs. The relationship between the new forming cluster and the ongoing oil/gas production north of Lake Erie is studied here. The parameters of the earthquakes in the area (hypocenter location, magnitudes, seismic moment, stress drop, and focal mechanism and/or seismic moment tensors for some events) are calculated using the POLARIS and Canadian National Seismic Network (CNSN) data. A temporary seismic network, consisting of four high-frequency three-component stations, has been installed in the fall of 2008 to record data from possible smaller events, not recorded by the permanent stations. The lithology, structural geology, and hydrology of the site are critical for determining if the water injection can induce seismic events. This type of data as well as data about the local tectonics (the existing faults) have been collected and analyzed. The main goal of this work was to find if any spatial or temporal correlations between the seismicity pattern and oil production/water injection exist. The preliminary results of the study suggest a correlation between the seismic activity and the oil/gas production. The study provides also additional information about the tectonic regime in southern Ontario and on throws some light on the hypothesis for induced seismicity due to the oil/gas production north of Lake Erie.

  • 8.
    Elming, Sten-åke
    et al.
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Pesonen, Lauri
    Division of Atmospheric Sciences and Geophysics, Department of Physics, University of Helsinki.
    Recent developments in paleomagnetism and geomagnetism2009In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 90, no 51, p. 502-Article in journal (Other academic)
  • 9.
    Ingri, Johan
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Redox potential: a significant factor in regulating the uptake of Cu, Ni and Zn by Mn-oxyhydroxide at the sediment-water interface in the northern Baltic Sea1993In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 74, no 16, p. 326-327Article in journal (Other academic)
  • 10.
    Lundberg, Angela
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Winter forest processes: measurements and modeling2006In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 87, no 52Article in journal (Other academic)
    Abstract [en]

    Winter-forest processes affect global and local climates. Weather-forecast, climate and hydrological modelers incorporate increasingly realistic surface schemes into their models, and algorithms describing snow accumulation and snow-interception sublimation are now finding their way into these schemes. Both point and spatially variable data for calibration and verification of wintertime dynamics are therefore needed for such modeling schemes. Snow forest atmosphere interaction studies at Luleå University of Technology (in co-operation with researchers in Sweden, Finland, UK and Japan) show that seasonal sublimation fraction of snow precipitation in confined coniferous forests range about 0.35 and single events with sublimation rates of up to 3.9 mm in 7 h were observed. The most important factors for calculating the sublimation were: the relative humidity, the aerodynamic resistance, the wind speed and the intercepted mass. The techniques used to study processes and rates were weighing cut tree and weighing througfall (in Sweden) γ-ray attenuation and tree weighing systems, combined with plastic sheet net rainfall gauges for throughfall (in UK) and snow course measurements in combination with forest density measurements (in Finland) and with sky view fraction (SVF) measurements (fish eyed camera)(in Japan). For the last study forest snow accumulation (SF) could be estimated from snowfall in open fields (SO) and from SVF according to: SF = SO (0.56 + 0.6 × SVF) for SVF < 0.72 and SF = SO for SVF > 0.72 (R2 = 0.86) as well as from leaf area index (LAI). For observation plots exceeding 1 ha the SVF was correlated to the normalized difference snow index (NDSI) using a Landsat-TM image and SF was related to SO and NDSI according to SF = SO (0.81 - 0.37 × NDSI). Plot-size limitations allowed inclusion of only one sparse forest observation so the relationship.

  • 11. Morgan, Julia K.
    et al.
    Ask, Maria
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
    Overpressures and lithification state of underthrust sediments along the Nankai accretionary margin: implications for decollement evolution2003In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 84, no 46Article in journal (Other academic)
  • 12.
    Rona, P.A.
    et al.
    NOAA/AOML, Miami.
    Boström, Kürt
    Stockholm University.
    Widenfalk, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Cronan, D.S.
    Imperial College.
    Jenkins, W.J.
    Woods Hole Oceanographic Institution, Woods Hole, Massachusetts.
    Asymmetric hydrothermal activity and tectonics of the Mid-Atlantic Ridge, 11 degrees to 26 degrees North1984In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 65, no Suppl., p. 974-Article in journal (Other academic)
  • 13.
    Rona, Peter A.
    et al.
    NOAA/AOML, Miami.
    Boström, Kurt
    Luleå tekniska universitet.
    Widenfalk, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Malette, M.
    Smithsonian Institution.
    Melson, W.B.
    Smithsonian Institution.
    Preliminary reconnaissance of the Carlsberg Ridge, northwestern Indian Ocean, for hydrothermal mineralization1981In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, no 45, p. 1-Article in journal (Other academic)
  • 14.
    Rona, Peter A.
    et al.
    National Oceanic and Atmospheric Administration, Miami.
    Widenfalk, Lennart
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
    Boström, Kurt
    Stockholm University.
    Ultramafic rock suite from the rift valley of the Mid-Atlantic Ridge near 15 degrees N1983In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 64, no 45, p. 724-Article in journal (Other academic)
  • 15.
    Tohver, E.
    et al.
    Universidade de Sao Paulo, Instituto de Geociencias.
    Filho, M. d'Agrella
    Universidade de Sao Paulo, Instituto de Geociencias.
    Santos, J. Orestes
    Geological Survey of Brazil (CPRM).
    Elming, Sten-åke
    Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Geosciences and Environmental Engineering.
    Trindade, R.I.
    Universidade de Sao Paulo, Instituto de Geociencias.
    Teixeira, W.
    Universidade de Sao Paulo, Instituto de Geociencias.
    Paleomagnetic evidence for a transpressional Grenville Orogen: sinistral offsets between Amazonia and Laurentia point to an evolving Rodinia2005In: EOS: Transactions, ISSN 0096-3941, E-ISSN 2324-9250, Vol. 86, no 52 Suppl, article id GP33A-0091Article in journal (Other academic)
    Abstract [en]

    We report three new paleomagnetic poles from the Amazon craton for the Meso/Neoproterozoic Grenvillian interval, a period notable for the eponymous continental collision that affected the eastern margin of Laurentia. The poles were derived from study of ca.1230 Ma mafic sills (Figueira Branca -V 40Ar/39Ar biotite), the 1149 , b7 Ma sediments of the Aguapeí Gp. (U-Pb SHRIMP analysis of authigenic xenotime) and the ca.980 Ma basaltic dykes and flat-lying flows (40Ar/39Ar biotite) that intrude and overlie the Aguapeí Gp. sediments. These new data define a skeletal apparent polar wander path marked by a counterclockwise loop, similar to that observed for North America and Baltica. A pole-by-pole comparison of the Amazon and North American data demonstrates the evolving paleogeographic affinity of these two continents, marked by the large-scale strike-slip movement of Amazonia relative to Laurentia. The 3000 km of sinistral offset between these two continents is substantiated by a 200 Ma record of sinistral transpression recorded in the 1.2-1.15 Ga deformation of basement rocks of the Amazon craton, the 1.1 Ga Nova Brasil\^{a}ndia belt, and the 1.05-1.0 Ga Sunsas belt of eastern Bolivia. Our observations suggest that transpressional collision of the Amazon craton and Laurentia was responsible for the bulk of Grenvillian deformation, as opposed to the multiple continents required by other Rodinia models.

1 - 15 of 15
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