Name: Jesper Kresten Nielsen
Position: Post doc.
Institution: Geological Institute,
Education: Ph.D. (Stable isotope and metal biogeochemistry, diagenesis,
anoxicity and
sedimentary mineralizations) 2001, Cand. scient. (Anoxicity and biogeochemistry) 1996
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Research areas:
My research project Carboniferous-Permian carbonates in the
carried out at the University of Tromsø (UiTø) and kindly financed by Statoil
and UiTø. One of the main objects is
the different biogeochemical processes that were present during deposition
and diagenesis of the carbonate and
siliciclastic sediments. In particularly the processes that may preserve and increase the
permeability and porosity
of the potential carbonate reservoir rocks are investigated. Also hydrocarbon
migration and the reactivity of
hydrocarbons to result in dissolution and precipitation of the carbonate and sulfur-containing
minerals are
emphasized. All these features are investigated by advanced microscope methods such
as cathodoluminescence
(CL), ultra-violet light (UV) and scanning electron microscopy
(SEM-EDX), and digital image analysis and
measurements (DIAM).
Stable isotope biogeochemistry (C, O and S) of different
compounds such as carbonates, metal sulfides, sulfates
and elemental sulfur are used to evaluate seawater and pore-fluid
compositions as well as anoxicity and different
microbial processes. Complementary information is obtained from radiogenic
isotopes of Sr. Isotopic compositions
are achieved by both conventional and in-situ
analysis with laser systems so the isotopes are linked directly to
crystal morphologies. Also trace element analyses are carried out by electron microprobe
and different kinds of
chemical and physical analytical bulk methods.
Other fieldwork areas than Barents Sea are Spitsbergen,
Persian Gulf, East Greenland and several parts of the
Nordic countries.
My personal interests are running (shorter than a marathon),
cross-country skiing, fly-fishing, fly-tying, and hiking
together with Catrine in the Norwegian mountains (see the picture above).
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