Essays about: "geochemical"

Showing result 36 - 40 of 118 essays containing the word geochemical.

  1. 36. Chemical Stabilization of Arsenic in Contaminated Soil under Low Redox Conditions

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

    Author : Eva Smedborn Pausson; [2019]
    Keywords : ;

    Abstract : Remediation techniques for arsenic contaminated soil have previously focused mostly on the surface soil layers where aerobic conditions are prevalent. In this master thesis, chemical stabilization by adding zero-valent iron (Fe(0)) and calcium oxide (CaO) to an arsenic-contaminated soil under low redox conditions have been studied through up-flow percolation tests. READ MORE

  3. 37. Cr-spinels in the Franklinian Mobile Belt : a geochemical record of Paleozoic tectonics

    University essay from Stockholms universitet/Institutionen för geologiska vetenskaper

    Author : Malvina Forbes Halldén; [2019]
    Keywords : geology; geochemistry; spinel; Cr-spinel; chromite; SEM; scanning electron microscope; electron microprobe; EMP; electron probe microanalyzer; EPMA; electron micro probe analyzer; EMPA; petrogenetic indicator; microscopy; alteration; Franklinian Mobile Belt; Kulutingwak Formation; Clements Markham fold belt; Pearya; Paleozoic; suprasubduction zone; SSZ; island arc; IA; Arctic Canadian Archipelago; Ellesmere Island; Canada; 2017 Circum-Arctic Structural Events Expedition 19; Memorial University of Newfoundland; geologi; geokemi; spinell; Cr-spinell; kromit; SEM; svepeletronmikroskopi; elektronmikrosondanalys; EMP; EPMA; EMPA; petrogenetisk indikator; mikroskopi; Franklinian Mobile Belt; Kulutingwak-formationen; Clements Markham fold belt; Pearya; Paleozoikum; suprasubduktionszon; SSZ; öbåge; IA; Kanadas arktiska öar; Ellesmereön; Kanada; 2017 Circum-Arctic Structural Events Expedition 19; Memorial University of Newfoundland;

    Abstract : The chemical compositions of Cr-spinel extracted from mafic and ultramafic rocks collected on Ellesmere Island in the Arctic Canadian Archipelago were obtained through electron microprobe analyses. The extensively altered rocks are sampled from rock units in the Franklinian MobileBelt, which is representative of a Paleozoic tectonically active oceanic regime of which little is presently known. READ MORE

  4. 38. Mineralogical and Geochemical characterization of the Fe-Cu-Occurrence and associated Hanging wall and Footwall Alteration halo of the Viscaria D-Zone, Kiruna District, Northern Sweden

    University essay from Luleå tekniska universitet/Geovetenskap och miljöteknik

    Author : Madelen Estholm; [2019]
    Keywords : Alteration halo;

    Abstract : Northern Norrbotten County is one of the three major ore producing districts in Sweden. Based on the predominance of epigenetic Cu-Au and Fe-oxide mineralization this region is regarded as a typical IOCG province. The massive to layered Viscaria Cu-deposit is proposed to be a VMS deposit of Besshi-type and is unique in deposit type of the region. READ MORE

  5. 39. Flotation of Yxsjöberg historical tungsten ore tailings

    University essay from Luleå tekniska universitet/Mineralteknik och metallurgi

    Author : Princess Rochelle Gan; [2019]
    Keywords : ;

    Abstract : Tailings dams, due to their sheer size and metal content, pose safety and environmental hazards. The Småltjarnen repository, which hosts material from the largest known tungsten mineralization in Sweden named the Yxsjöberg deposit, is estimated to contain 2. READ MORE

  6. 40. Using Very-Low-Frequency Electromagnetics (VLF-EM) for geophysical exploration at Albertine Graben, Uganda : a new CAD approach for 3D data blending

    University essay from Lunds universitet/Geologiska institutionen

    Author : David Eggert; [2019]
    Keywords : Albertine Graben; EAR; East-African-Rift; Exploration; Geology; Geophysics; Ore; Uganda; Very Low Frequency; VLF-EM; Earth and Environmental Sciences;

    Abstract : Elektromagnetiska vågor, även kända som radiovågor, är vågor som sprider sig med låga frekvenser från 3 till 30 kHz. Dessa lågfrekventa vågor används vanligtvis när man önskar kommunicera med ubåtar. De kan emellertid också användas på land för att mäta skillnader i jord– och bergarters elektriska konduktivitet. READ MORE