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Multicollector Mass Spectrometry

The mass spectrometry laboratory of the isotope geochemistry group is equipped with a Triton Thermal Ionization Mass Spectrometer (TIMS) and a Neptun Multicollector ICP-Mass Spectrometer (MC-ICPMS) for high precision analyses of non-traditional stable (e.g. Li, B, Ca, Cu...) and radiogenic (e.g. Sr, Nd, Pb...) isotopes. A clean laboratory is available for sample preparation and chemical separation. Isotope systems are used as proxies for a variety of endogenic and exogenic processes in palaeo-oceanic and tectonic research. The reconstruction of (sub)recent or past conditions in climate and environmental research includes the systematic fractionation of stable isotope ratios in inorganic and biogenic marine carbonates that depends on e.g. variation in temperature, in ocean pH and weathering conditions. The signatures of radiogenic isotopes provide information on the continental input into the ocean. This input reflects large scale variations in weathering and rates of denudation that are controlled by orogen building, large igneous events (e.g. flood basalt) or climatic changes like glacial and interglacial intervals.

Anette Meixner