Department of Geosciences Naturhistoriska Riksmuseet
Responsibilities I am primarily responsible for the ion microprobe facility, NordSIMS, which operates a large geometry CAMECA ims1280 instrument as a joint Nordic infrastructure between the museum, the Swedish Research Council and the University of Iceland. This role involves coordinating the facility staff resources, evaluation (together with the steering committee) and implementation of external projects, methodological development, and quality control, as well as reporting to the funding organisations and obtaining operating funds. I am also involved in some teaching at undergraduate and master’s level at Stockholm University. Research interests My primary research interests are in applying radiogenic and stable isotopes to the evolution of the terrestrial planets, including the Earth. Specific questions that I am addressing include (1) the earliest evolution of the Earth-Moon system and development of major isotopic and geochemical reservoirs in the first few million years after planetary accretion; (2) the origin and nature of early crusts on the terrestrial planets and, specifically on Earth, the transition from such protocrust to modern-style plate-tectonic recycling; (3) the nature and evolution of the early surface reservoirs (atmosphere, hydrosphere); (4) evidence for early biogenic activity on Earth. These investigations are largely conducted using in situ microanalysis of both radiogenic and stable isotopes with the ion microprobe coupled with other in situ and bulk analytical methods. In the more recent geological record, I am interested in the Neoarchean evolution of the North Atlantic Craton, primarily in Labrador, Greenland and Scotland as well as the Neoproterozoic evolution of the Arabian-Nubian Shield, one of the largest regions of juvenile crustal growth on the planet. I am also active in developing novel ion microprobe methods applied to modern ecology as well as nuclear safeguards and forensics. My research is currently funded by the Knut and Alice Wallenberg Foundation, the Swedish Research Council (VR) and the Swedish Radiological Protection Board.
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