Essays about: "granitoids"

Showing result 1 - 5 of 9 essays containing the word granitoids.

  1. 1. Genetic relationships and origin of the Ädelfors gold deposits in Southeastern Sweden

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

    Author : Tobias Wiberg Steen; [2018]
    Keywords : Ädelfors; sulfur isotope ratio; pyrite chemistry; orogenic gold; gold; gold quartz vein; trace elements; gold mine; banded iron formation; SEM-EDS analysis; gold silver ratio; Ädelfors; svavelisotoper; pyritkemi; orogent guld; guldrik kvartsåder; guld; guldfyndighet; spårelement; bandad järnmalm; SEM-EDS analys; guld silver förhållande;

    Abstract : Ädelfors is situated ca 17 km east of Vetlanda, Jönköping County, in the N-S striking Trans-scandinavian igneous belt and is a part of the NE-SW striking 1.83-1.82 Ga Oskarshamn-Jönköping belt emplaced during a continental subduction towards the Svecofennian continental margin. The continental arc hosts the 1. READ MORE

  3. 2. Compositional Systematics of Sphalerites from Western Bergslagen, Sweden

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Aristeidis Kritikos; [2016]
    Keywords : Western Bergslagen; sphalerite; critical elements; trace elements; substitution mechanisms; EMPA; LA-ICP-MS; Västra Bergslagen; zinkblände; kritiska metaller; spårelement; substitutionsmekanismer; EMPA; LA-ICP-MS;

    Abstract : Sphalerite is, apart from being the main global source of zinc (Zn), also one of the main source for the critical elements indium (In), gallium (Ga) and germanium (Ge), which can be extracted as by-products during Zn mining. In the westernmost part of the Palaeoproterozoic Bergslagen ore province, Sweden, In-anomalies have been reported from sulphide mineralizations. READ MORE

  4. 3. Understanding igneous processes through zircon trace element systematics : prospects and pitfalls

    University essay from Lunds universitet/Geologiska institutionen

    Author : Marín Ósk Hafnadóttir; [2014]
    Keywords : plagioclase fractionation. zirkon; hydrothermal alteration; precambrian; zircon; Ghana; hydrotermal-omvandling; plagioklasfraktionering; Earth and Environmental Sciences;

    Abstract : Zirkon från magmatiska bergarter extraherades från fem granitoider i Birimianterrängen i Ghana., och detritala zirkoner provtogs från sex platser i centrala Västgrönland. Av dessa härrör en population från palaeoproterozoikum i Prøvens magmatiska komplex. READ MORE

  5. 4. The Birimian event in the Baoulé Mossi domain (West African Craton) : regional and global context

    University essay from Lunds universitet/Geologiska institutionen

    Author : Mikael Grenholm; [2014]
    Keywords : accretionary orogen; Atlantica; Birimian event; supercontinent cycle; Lomagundi-Jatuli event; Earth and Environmental Sciences;

    Abstract : The crystalline basement of the West African Craton (WAC) was established during the Siderian to Orosirian (circa 2.35-1.95 Ga) Birimian event through accretion of extensive tracts of juvenile crust that was tectonically juxtaposed with Archean cratons. READ MORE

  6. 5. Petrology of Birimian granitoids in southern Ghana : petrography and petrogenesis

    University essay from Lunds universitet/Geologiska institutionen

    Author : Mikael Grenholm; [2011]
    Keywords : Ghana; Birimian; granitoids; subduction; TTG; water-saturated melting; transcurrent deformation; Earth and Environmental Sciences;

    Abstract : Den Paleoproterozoiska Birimiska terrinen består av vulkaniska och sedimentära bergarter i grönstensbälten och metasedimentära bassänger som har blivit intruderade av två generationer granitoider. Den Birimiska terrinen utgör en stor del av den västafrikanska kratonen. READ MORE