Hei Geo! My name is Samuel Pereira and I have just started my PhD in ‘Hydrothermal Organic Geochemistry’ at the Department for Earth Sciences and K.G. Jebsen Centre for Deep-Sea Research.
I’m from Mumbai (India) and I’ve completed my Bachelor’s degree in Geology (2014-2017) from St Xavier’s College, Mumbai and I also have a Master’s degree in Marine Geosciences (2017-2020) from University of Bremen (Germany). Where I worked with the working groups of Wolfgang Bach and Andrea Koschinsky (MARUM, University of Bremen). My master thesis ‘Geochemical investigations of hydrothermal fluids from the South-Sandwich plate, (Southern Ocean)’ was focussed on fluid geochemistry and thermodynamic modelling in unravelling the formation of magmatic and seawater derived deep-sea hydrothermal fluids.
My aim area of focus has been deep-sea hydrothermal systems, previously I’ve focussed on the inorganics and volatiles in these systems (essentially in the fluids) to understand the formation of these energy-rich fluids, using the chemistry of various species in the fluids (major, minor and trace elements), speciation and solubility calculations, fluid-rock interactions and catabolic thermodynamic models to further understand them in detail.
At UiB has a part of project HyPOD (Hydrothermal Production of Organic molecules: carbon transformation and Decomposition in ocean crust fluids), I’ll be working with Eoghan P. Reeves in understanding the formation of organic molecules in these fluids as a result of pyrolysis of microbial biomass under hydrothermal conditions. High temperature-pressure experiments will be conducted using lab-cultivated biomass (bacteria and archaea) under realistic redox conditions. I’ll be analysing these fluids for hydrocarbons, alcohols, carboxylic acids, amino acids and biomarkers. I’ll also be collaborating with Prof. Ida Helene Steen, Dr Håkon Dahle at Bio, UiB and Dr Florence Schubotz (MARUM, University of Bremen). I’m very excited to continue studying these marvellous deep-sea hydrothermal systems as a part of my PhD and I’m looking forward towards my stay in Bergen! You will find Samuel in room 4140. Welcome to GEO 🙂