Sökning: "serpentinization"

Hittade 4 avhandlingar innehållade ordet serpentinization.

  1. 1. Deformation and fluid-flow in magma-poor margins : A study of the Tasna Ocean-Continent transition, SE Switzerland

    Författare :Anna Engström; Alasdair Skelton; Hemin Koyi; Gianreto Manatschal; Wolfgang Bach; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Magma-poor margins; Deformation; Fluid-flow; Serpentinization; Earth sciences; Geovetenskap;

    Sammanfattning : In this study, interaction between fluids and deformation during the final stages of magma-poor rifting was investigated. The Tasna Ocean-Continent transition, located in the Swiss Alps, was studied and a large data set was obtained from profiles oriented perpendicular to two detachment faults. LÄS MER

  3. 2. Organics in hydrothermal fluids from ultramafic-hosted vents of the Mid-Atlantic Ridge

    Författare :cecile konn; Stockholms universitet; []
    Nyckelord :hydrothermal; organics; serpentinization; origin of life;

    Sammanfattning : The process of serpentinization at slow spreading ridges is due to the circulation of seawater through outcropping mantle rocks. The peridotites of the mantle are altered via fluid-rock interaction generating, in the presence of Fe bearing minerals, high CH4- and H2-concentrations in the water column. LÄS MER

  4. 3. Low temperature olivine alteration ; an experimental approach

    Författare :Anna Neubeck; Nils Holm; Gretchen Früh-Green; Stockholms universitet; []
    Nyckelord :Olivine alteration; hydrogen; methane; serpentinization; geokemi; Geochemistry;

    Sammanfattning : Water reacting with minerals to alter or dissolve them is a common phenomenon on Earth, leading to a unique chemical composition of the oceans and continents. The continuous circulation of elements and the chemical reactions between them creates the extraordinary environment prevailing on our Earth today and was probably an important requirement for the onset of life on our planet. LÄS MER

  5. 4. Abiotic and biotic methane dynamics in relation to the origin of life

    Författare :Nguyen Thanh Duc; David Bastviken; Patrick Crill; Nils Holm; Edward Hornibrook; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; methane; methanogens; methane formation; methane oxidation; lake sediment; olivine; origin of life; geokemi; Geochemistry;

    Sammanfattning : Methane (CH4) plays an important role in regulating Earth’s climate. Its atmospheric concentrations are related to both biotic and abiotic processes. The biotic one can be formed either by chemoautotrophic or heterotrophic pathways by methanogens. LÄS MER