PhD student at University Bremen/MARUM (Germany),
General Geology - Marine Geology
|2016 - 2019||
University Bremen (Germany), Marine Geosciences,
Master of Science
|2013 - 2016||
TU Bergakademie Freiberg (Germany), Geology/Mineralogy,
Bachelor of Science
Submarine precipitates from the Scotia Sea and the Mediterranean – archives for shallow hydrothermal to deep-rooted fluid flow
The South Sandwich island arc is situated in the Atlantic part of the Southern Ocean and consists of eleven volcanic islands, the South Sandwich Islands (SSI), and submarine volcanoes. This island arc is forming as a result of the subduction of the South American plate under the Sandwich micro-plate. Furthermore, the East Scotia Ridge (ESR), which is referred to as an inter-oceanic back-arc spreading ridge, is associated with the subduction zone as well. This back-arc spreading ridge is located in the west of the South Sandwich
island arc and consists of ten ridge segments (E1-E10). Specifically in E2 and E9, hydrothermally active sites are known, occurring as actively venting chimneys. In addition, hydrothermal activity is also recorded from the volcanic island arc setting.
The submarine caldera west of Kemp Seamount is of particular interest. This area, known as Kemp Caldera, was newly discovered during a geophysical survey of the research cruise JR224 in 2009. A remarkable
(seafloor) feature in the middle of the caldera is a cone, interpreted as resurgent cone. Extinct chimneys and white smoker vent fields were found around this cone but are poorly imaged in the bathymetry of the seafloor.
To have a closer look into processes and dynamics of subduction-related vents and seeps, another site will be considered namely the Mediterranean Ridge at the Hellenic subduction zone in the Eastern Mediterranean Sea. Due to initial continental collision of the African and the Eurasian Plate, the backstop of the
Mediterranean Ridge is faulted while the ridge itself is being thrust over the backstop and fluid flow along emergent active thrusts occur. Despite that the settings of these subduction zones are different it will be tested if the mineral precipitates of both locations are comparable in respect to crucial fluid-flow processes.
My PhD work is part of the Cluster of Excellence in the general area “The Ocean Floor as Reactor”. In my project, I will focus first of all on the determination and differentiation of the hydrothermal precipitates found in the Scotia Sea, especially in the Kemp Caldera. Thus, I want to enhance the understanding of the genesis of these precipitates and the submarine caldera itself. Therefore, a geological mapping of the Kemp Caldera is necessary to get an overview and better understanding of the morphology and the geological setting. Further on, I want to have a closer look on the vent precipitates at the Mediterranean Ridge. Fluid-flow processes and mineralization products as a result of fluid/rock interaction and subsequent mineral precipitation may be similar. Therefore, I want to compare the vent precipitates from the Mediterranean Ridge with the samples taken in the Scotia Sea.