Essays about: "Overprint"

Showing result 1 - 5 of 7 essays containing the word Overprint.

  1. 1. Zircon U-Pb constraints on the timing of Sveconorwegian migmatite formation in the Western and Median Segments of the Idefjorden terrane, SW Sweden

    University essay from Lunds universitet/Geologiska institutionen

    Author : Mimmi Ingered; [2019]
    Keywords : Sveconorwegian orogen; U-Pb; Zircon; Migmatite; Idefjorden terrane; Earth and Environmental Sciences;

    Abstract : The Western and Median Segments of the Idefjorden terrane have been metamorphosed and migmatized during the Sveconorwegian orogeny (ca. 1 Ga), but the timing of these events between the two segments remains unclear. READ MORE

  3. 2. 1D and 2D Modelling of AMT and CSAMT Measurements from Swedish Lapland - A Case Study

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Lisa Dossow; [2018]
    Keywords : audiomagnetotellurics; controlled source audiomagnetotellurics; Gällivare; Kiruna; time series processing; 1D and 2D inversion;

    Abstract : Audiomagnetotelluric measurements with (CSAMT) and without (AMT) a controlled source were performed near Gällivare and Kiruna in Swedish Lapland in order to retrieve representative conductivity models of the subsurfaces. Magnetotelluric transfer functions were gained from processed time series’ and subsequently inverted to generate the sought models successfully. READ MORE

  4. 3. Hydrothermal alteration and lithogeochemical marker units at the Svärdsjö Zn-Pb-Cu deposit, Bergslagen, Sweden, and their implications for exploration

    University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

    Author : Anton Fahlvik; [2018]
    Keywords : Hydrothermal alteration; Lithogeochemistry; Exploration; Bergslagen; Svärdsjö;

    Abstract : In exploration, a lithogeochemical approach can be used to aid the characterisation of rocks surrounding metamorphosed and hydrothermally altered deposits. Accurate description of the geological setting of deposits is crucial for understanding the ore forming processes and identifying targets for exploration. READ MORE

  5. 4. Structural Reconnaissance Mapping of the Nasa Basement Window, Southern Norrbotten Caledonides

    University essay from Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Author : Hugo Hedin Baastrup; [2018]
    Keywords : Caledonides; Belt; Window; Thrust; Shear; Basement; Nappe; Tectonic; Arjeplog; Nasa; Saltfjellet; Overprint;

    Abstract : Too few documentative descriptions exist from the reactivated Proterozoic Nasa Basement window in Sweden. This re-exposed crustal piece predominantly consisting of 1.8 Ga granite and volcanic basement rock lack structural evidences on maps. READ MORE

  6. 5. Pressure-Temperature-time Constraints on the Deep Subduction of the Seve Nappe Complex in Jämtland and southern Västerbotten, Scandinavian Caledonides

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Johanna Holmberg; [2017]
    Keywords : Seve Nappe Complex; COSC-1; Raman spectroscopy; QuiG barometry; kyanite-garnet gneiss; Lu-Hf garnet geochronology; Seveskollan; COSC-1; Raman spektroskopering; QuiG barometri; kyanit-granatförande gnejs; Lu-Hf granat geokronologi;

    Abstract : The Scandinavian Caledonides are defined by long transported thrust sheets emplaced in a nappe stratigraphic succession onto the Paleozoic Baltica platform, as a result of the collision between the paleo-continents Baltica and Laurentia. This Palaeozoic collisional orogen is nowadays exposed at mid-crustal levels, thus provides an excellent ground for in situ studies of mountain building processes. READ MORE