AG Petrology of the Ocean Crust

Room 5300

Department of Geosciences
University of Bremen
Klagenfurter Straße 2
28359 Bremen

Phone: +49 421 218 65406
Fax: +49 421 218 65429

Karin Los

Research theme

Massive sulphides deposits are found in the vicinity of mid-ocean ridges. These are thought to be formed when metasomatic fluids from the oceanic crust come into contact with fresh ocean water. At mixing, sulphate minerals such as anhydrite and barite precipitate quickly. Later, upon cooling, these minerals dissolve and metal-bearing sulphides are formed. The aim of my study is to investigate this replacement reaction and shed light on the hydrothermal formation of massive sulphide deposits. I will try to give more insight in the coupling between mineral replacement and rock porosity and permeability, by looking at the sulphate-sulphide mineral system.

This project is part of the Marie Curie ITN program ABYSS.

Scientific career

  • 2009 - 2012: B.Sc. Earth Sciences at Utrecht University
    • 2010: Erasmus exchange program at the Autonomous University of Barcelona (6 months)
    • 2012: Bachelor thesis: "Exploring the potential of liquidus spinel as indicator of magma sources in the mantle"
  • 2012 - 2014: M.Sc. Earth Science at Utrecht University
    • 2014: Master thesis: "Feldspar replacement reactions by interface-coupled dissolution-precipitation: a case study from the Larvik Plutonic Complex, SE-Norway"
  • 2014 - 2017: Ph.D. student at the research group "Petrology of the ocean crust" at Bremen University
    • November 2017: Dr. rer. nat. in Geosciences


  • Giampouras M, Garrido GC, Bach W, Los C, Fussmann D, Monien P, Garcia-Ruiz JM (2020): On the controls of mineral assemblages and textures in alkaline springs, Samail Ophiolite, Oman. Chemical Geology 533, 119435.
    | doi:10.1016/j.chemgeo.2019.119435 |
  • Los C, Bach W (2018): Sulfidation of major rock types of the oceanic lithosphere; an experimental study at 250 °C and 400 bars. Lithos 323, 208-217.
    | doi:10.1016/j.lithos.2018.02.006 |
  • Plümper O, Botan A, Los C, Liu Y, Malthe-Sorenssen Anders, Jamtveit B (2017): Fluid-driven metamorphism of the continental crust governed by nanoscale fluid flow. Nature Geoscience 10, 685-690.
    | doi:10.1038/ngeo3009 |

Conference Abstracts

  • Los CL, Kahl W-A, Bach W (2017): Length scales of reactive transport in basalt: Hydrothermal flow-through experiments and anhydrite precipitation. AGU Fall Meeting 2017, New Orleans, United States.
  • Giampouras M, Garcia-Ruiz JM, Bach W, Garrido CJ, Los CL, Fußmann D, Monien P (2017): Effect of hydrochemistry on mineral precipitation and textural diversity in serpentinization-driven alkaline environments; Insights from thermal springs in the Oman Ophiolite. AGU Fall Meeting 2017, New Orleans, United States.
  • Los CL, Kahl W-A, Bach W (2017): Reactive transport in basalt: sulfate precipitation in flow-through experiments. GeoBremen 2017, Bremen, Germany.
  • Los CL, Hansen C, Bach W (2017): Sulphidation of the oceanic lithosphere: an experimental approach. European Geosciences Union General Assembly 2017, Vienna, Austria.
  • Giampouras M, Garcia-Ruiz JM, Bach W, Garrido CJ, Los CL, Fussmann D, Monien P (2017): Mineral textures in serpentine-hosted alkaline springs from the Oman ophiolite. European Geosciences Union General Assembly 2017, Vienna, Austria.
  • Los CL, Bach W, Plümper O (2016): Replacive sulfide formation in anhydrite chimneys from the Pacmanus hydrothermal field, Papua New Guinea. European Geosciences Union General Assembly 2016, Vienna, Austria (Poster).
  • Los CL, Hansen C, Bach W (2016): Sulphidation of serpentinite at 250 °C and 400 bars: an experimental approach to seafloor alteration. Serpentine Days, Sète, France (Poster).
  • Los CL, Kahl W-A, Plümper O, Bach W (2016): Formation of replacive sulphide in anhydrite chimneys. DMG Meeting 2016 Geochemistry-Petrology-Petrophysics, Bremen, Germany.