Organic, Inorganic and Isotopic Geochemistry Laboratory (LGO2i)

LGO2i comprises four geochemistry units dedicated to new quantitative methods for determining the magnitude and timing of climate variations from various archives such as ocean and lake sediments, corals, speleothems and polar ice.

The multiple geochemical indicators ("proxies") measured in the four LGO2i units are often complementary, making it possible either to study the same climatic event in different types of archives, or to reconstruct different environmental parameters in the same archive.

Our equipment is mainly housed in the Trocadero building in Arbois, a branch of the Collège de France inaugurated in 2005 and since integrated into the UMR CEREGE. In 2014, the Trocadero building was renovated and an extension was built to house the accelerator mass spectrometer dedicated to radiocarbon (AixMICADAS) and the polar ice chemistry unit.