At sea
On land
- tbs: 'GeoBioSWIR' @Southwest Indian Ridge (Indian Ocean), as Co-PI, onboard R/V Sonne, 35 days
- 2023: PS137 'Arctic lithosphere–ocean interaction study' @Gakkel Ridge (Arctic Ocean), onboard R/V Polarstern, 41 days
- 2022: IODP Exp. 393 'South Atlantic Transect II' @South Atlantic, onboard D/V JOIDES Resolution, 62 days
- 2020: SO273 'Marion Rise' @Southwest Indian Ridge (Indian Ocean), onboard R/V Sonne, 48 days
- 2016–2017: IODP Exp. 366 'Mariana Convergent Margin' @Mariana Forearc (NW Pacific), onboard D/V JOIDES Resolution, 61 days
- 2016: PS101 'Karasik Seamount' @Gakkel Ridge (Arctic Ocean), onboard R/V Polarstern, 45 days
- 2014: PS88.1 'POLMAR-Train' @North Sea/Atlantic Ocean, onboard R/V Polarstern, 9 days
On land
- 2022: Serpentinites of the Coast Range Ophiolite, California, 12 days
PS137: Alois
Expedition PS137, named ALOIS (Arctic Lithosphere–Ocean Interaction Study), aimed at investigating the formation of new lithosphere and associated hydrothermal circulation at the ultraslow-spreading Gakkel Ridge and Lena Trough, Arctic Ocean. My own interest was the collection of rocks and hydrothermal precipitates as well as hydrothermal fluid and plume samples from the ‘Aurora’ and ‘Lucky B’ hydrothermal systems.
IODP Exp. 393: South Atlantic Transect II
The South Atlantic Transect is a multidisciplinary ocean drilling project that included two expeditions (IODP Exp. 390 & 393) at which up to 200 m of basaltic crust as well as overlying sediments were drilled along a Mid-Atlantic Ridge crustal flow line. Basement and sediments were recovered at 7, 15, 31, 49, and 61 Ma old sites to investigate hydrothermal interactions between the aging oceanic crust and the evolving South Atlantic, microbiology of crust and sediments, as well as the evolution of deep-water masses and past climatic changes.
CaliforniaN Coast Ranges
Subduction and accretion processes in the Mesozoic have lead to the formation of "sedimentary serpentinites" in the Coast Ranges of California. A number of them are considered as paleo-analogs of the modern serpentinite mud volcanoes in the Mariana Forearc. We sampled serpentinites and associated lithologies to investigate serpentinization reactions and their possible ramifications for the cycling of carbon in ancient subduction systems.